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L'<a href="/wiki/Eccentricit%C3%A0_(matematica)" title="Eccentricità (matematica)">eccentricità</a> di questa sezione conica, detta <b>eccentricità dell'orbita</b> o <b>eccentricità orbitale</b>, è un importante parametro per la definizione assoluta della sua forma circolare come una sfera perfetta. </p><p>L'eccentricità può essere considerata come la misura di quanto l'orbita sia deviata da un <a href="/wiki/Cerchio" title="Cerchio">cerchio</a>. </p> <div id="toc" class="toc" role="navigation" aria-labelledby="mw-toc-heading"><input type="checkbox" role="button" id="toctogglecheckbox" class="toctogglecheckbox" style="display:none" /><div class="toctitle" lang="it" dir="ltr"><h2 id="mw-toc-heading">Indice</h2><span class="toctogglespan"><label class="toctogglelabel" for="toctogglecheckbox"></label></span></div> <ul> <li class="toclevel-1 tocsection-1"><a href="#Definizione"><span class="tocnumber">1</span> <span class="toctext">Definizione</span></a></li> <li class="toclevel-1 tocsection-2"><a href="#Calcolo"><span class="tocnumber">2</span> <span class="toctext">Calcolo</span></a></li> <li class="toclevel-1 tocsection-3"><a href="#Esempi"><span class="tocnumber">3</span> <span class="toctext">Esempi</span></a></li> <li class="toclevel-1 tocsection-4"><a href="#Pianeti_extrasolari"><span class="tocnumber">4</span> <span class="toctext">Pianeti extrasolari</span></a></li> <li class="toclevel-1 tocsection-5"><a href="#Note"><span class="tocnumber">5</span> <span class="toctext">Note</span></a></li> <li class="toclevel-1 tocsection-6"><a href="#Voci_correlate"><span class="tocnumber">6</span> <span class="toctext">Voci correlate</span></a></li> <li class="toclevel-1 tocsection-7"><a href="#Collegamenti_esterni"><span class="tocnumber">7</span> <span class="toctext">Collegamenti esterni</span></a></li> </ul> </div> <div class="mw-heading mw-heading2"><h2 id="Definizione">Definizione</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Eccentricit%C3%A0_orbitale&veaction=edit&section=1" title="Modifica la sezione Definizione" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Eccentricit%C3%A0_orbitale&action=edit&section=1" title="Edit section's source code: Definizione"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="thumb tright"><div class="thumbinner" style="width:212px;flex-direction:row"><div class="tsingle" style="float:left;margin:1px;width:210px;padding-left:0px;padding-right:0px"><div class="thumbimage" style="height:208px;overflow:hidden"><span typeof="mw:File"><a href="/wiki/File:Binary_system_orbit_q%3D3_e%3D0.gif" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/ae/Binary_system_orbit_q%3D3_e%3D0.gif/208px-Binary_system_orbit_q%3D3_e%3D0.gif" decoding="async" width="208" height="208" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/a/ae/Binary_system_orbit_q%3D3_e%3D0.gif 1.5x" data-file-width="220" data-file-height="220" /></a></span></div><div class="thumbcaption" style="clear:left"><i>e</i> = 0</div></div><div style="clear:left"></div><div class="tsingle" style="float:left;margin:1px;width:210px;padding-left:0px;padding-right:0px"><div class="thumbimage" style="height:182px;overflow:hidden"><span typeof="mw:File"><a href="/wiki/File:Binary_system_orbit_q%3D3_e%3D0.5.gif" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7a/Binary_system_orbit_q%3D3_e%3D0.5.gif/208px-Binary_system_orbit_q%3D3_e%3D0.5.gif" decoding="async" width="208" height="182" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/7/7a/Binary_system_orbit_q%3D3_e%3D0.5.gif 1.5x" data-file-width="220" data-file-height="193" /></a></span></div><div class="thumbcaption" style="clear:left"><i>e</i> = 0,5</div></div><div style="clear:left"></div><div class="thumbcaption" style="clear:left;text-align:left">Le orbite in un sistema di due corpi celesti per due diversi valori di eccentricità (<i>e</i>). (+ è il <a href="/wiki/Centro_di_massa" title="Centro di massa">baricentro</a>)</div></div></div> <p>Sempre sotto le ipotesi standard, l'eccentricità orbitale (<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle e}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>e</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle e}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/cd253103f0876afc68ebead27a5aa9867d927467" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.083ex; height:1.676ex;" alt="{\displaystyle e}"></span>) è definita rigorosamente per tutte le <a href="/wiki/Orbita_circolare" title="Orbita circolare">orbite circolari</a>, <a href="/wiki/Orbita_ellittica" title="Orbita ellittica">ellittiche</a>, <a href="/wiki/Traiettoria_parabolica" title="Traiettoria parabolica">paraboliche</a>, <a href="/wiki/Traiettoria_iperbolica" title="Traiettoria iperbolica">iperboliche</a> e vale: </p> <ul><li>per le <a href="/wiki/Orbita_circolare" title="Orbita circolare">orbite circolari</a>: <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle e=0}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>e</mi> <mo>=</mo> <mn>0</mn> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle e=0}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/d9850169d70a5ab7df71c2126441a86cec93eec8" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:5.344ex; height:2.176ex;" alt="{\displaystyle e=0}"></span>,</li> <li>per le <a href="/wiki/Orbita_ellittica" title="Orbita ellittica">orbite ellittiche</a>: <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle 0<e<1}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mn>0</mn> <mo><</mo> <mi>e</mi> <mo><</mo> <mn>1</mn> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle 0<e<1}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/679de8c4138507493a1cc5adc572bb0ffdd19a82" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:9.605ex; height:2.176ex;" alt="{\displaystyle 0<e<1}"></span>,</li> <li>per le <a href="/wiki/Traiettoria_parabolica" title="Traiettoria parabolica">traiettorie paraboliche</a>: <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle e=1}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>e</mi> <mo>=</mo> <mn>1</mn> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle e=1}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/9c2f5932668126c63c844dc00ca187bc58a29e5a" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:5.344ex; height:2.176ex;" alt="{\displaystyle e=1}"></span>,</li> <li>per le <a href="/wiki/Traiettoria_iperbolica" title="Traiettoria iperbolica">traiettorie iperboliche</a>: <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle e>1}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>e</mi> <mo>></mo> <mn>1</mn> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle e>1}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/9605ca17e3915b659685c0326fbbcbfb522f11b3" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:5.344ex; height:2.176ex;" alt="{\displaystyle e>1}"></span>.</li></ul> <p>L'eccentricità, a prescindere dal tipo di orbita, è data da </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle e={\sqrt {1+{\frac {2EL^{2}}{m_{\text{rid}}\alpha ^{2}}}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>e</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <msqrt> <mn>1</mn> <mo>+</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <mn>2</mn> <mi>E</mi> <msup> <mi>L</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> </mrow> <mrow> <msub> <mi>m</mi> <mrow class="MJX-TeXAtom-ORD"> <mtext>rid</mtext> </mrow> </msub> <msup> <mi>α</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> </mrow> </mfrac> </mrow> </msqrt> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle e={\sqrt {1+{\frac {2EL^{2}}{m_{\text{rid}}\alpha ^{2}}}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/8d5e84028e0a9f0a32367ac3455cb7d48590a65f" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -3.171ex; width:18.175ex; height:7.509ex;" alt="{\displaystyle e={\sqrt {1+{\frac {2EL^{2}}{m_{\text{rid}}\alpha ^{2}}}}}}"></span></dd></dl> <p>dove <i>E</i> è l'<a href="/wiki/Energia_orbitale_specifica" title="Energia orbitale specifica">energia orbitale</a> totale, <i>L</i> è il <a href="/wiki/Momento_angolare" title="Momento angolare">momento angolare</a>, <i>m</i><sub>rid</sub> è la <a href="/wiki/Massa_ridotta" title="Massa ridotta">massa ridotta</a>, e <i>α</i> il coefficiente della <a href="/wiki/Forza_centrale" title="Forza centrale">forza centrale</a> che <a href="/wiki/Legge_dell%27inverso_del_quadrato" title="Legge dell'inverso del quadrato">va con il quadrato della distanza</a>: ad esempio la <a href="/wiki/Interazione_gravitazionale" title="Interazione gravitazionale">gravità</a> o l'<a href="/wiki/Elettrostatica" title="Elettrostatica">elettrostatica</a> in <a href="/wiki/Meccanica_classica" title="Meccanica classica">meccanica classica</a>. </p><p>Ad esempio, per la forza gravitazionale </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle F={\frac {\alpha }{r^{2}}}={\frac {GMm}{r^{2}}},}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>F</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mi>α</mi> <msup> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> </mfrac> </mrow> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <mi>G</mi> <mi>M</mi> <mi>m</mi> </mrow> <msup> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> </mfrac> </mrow> <mo>,</mo> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle F={\frac {\alpha }{r^{2}}}={\frac {GMm}{r^{2}}},}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/51f89e45fa29ab3682add0e0b837dfc3a5157a73" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.171ex; width:18.669ex; height:5.676ex;" alt="{\displaystyle F={\frac {\alpha }{r^{2}}}={\frac {GMm}{r^{2}}},}"></span></dd></dl> <p>la formula per l'eccentricità diventa: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle e={\sqrt {1+{\frac {2\varepsilon h^{2}}{\mu ^{2}}}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>e</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <msqrt> <mn>1</mn> <mo>+</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <mn>2</mn> <mi>ε</mi> <msup> <mi>h</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> </mrow> <msup> <mi>μ</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> </mfrac> </mrow> </msqrt> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle e={\sqrt {1+{\frac {2\varepsilon h^{2}}{\mu ^{2}}}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/56bf173b613ed5a2cc8485714c210108884d2c31" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -3.338ex; width:15.984ex; height:7.676ex;" alt="{\displaystyle e={\sqrt {1+{\frac {2\varepsilon h^{2}}{\mu ^{2}}}}}}"></span></dd></dl> <p>dove <i>ε</i> è l'<a href="/wiki/Energia_orbitale_specifica" title="Energia orbitale specifica">energia orbitale specifica</a> (energia totale divisa per la massa ridotta), <i>μ</i> la <a href="/wiki/Costante_gravitazionale_planetaria" title="Costante gravitazionale planetaria">costante gravitazionale planetaria</a> basata sulla massa totale, e <i>h</i> il <a href="/wiki/Momento_angolare_specifico" title="Momento angolare specifico">momento angolare specifico</a> (momento angolare diviso per la massa ridotta). </p> <div class="mw-heading mw-heading2"><h2 id="Calcolo">Calcolo</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Eccentricit%C3%A0_orbitale&veaction=edit&section=2" title="Modifica la sezione Calcolo" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Eccentricit%C3%A0_orbitale&action=edit&section=2" title="Edit section's source code: Calcolo"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>L'eccentricità di un'<a href="/wiki/Orbita" title="Orbita">orbita</a> può essere calcolata a partire dai <a href="/wiki/Vettore_(matematica)" title="Vettore (matematica)">vettori di stato</a> come <a href="/wiki/Valore_assoluto#Valore_assoluto_dei_vettori" title="Valore assoluto">valore assoluto</a> del <a href="/wiki/Vettore_eccentricit%C3%A0" title="Vettore eccentricità">vettore eccentricità</a>: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle e=\left|\mathbf {e} \right|}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>e</mi> <mo>=</mo> <mrow> <mo>|</mo> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="bold">e</mi> </mrow> <mo>|</mo> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle e=\left|\mathbf {e} \right|}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/c093a492d9d4b09ece25d6ded7ae9f6988b976f4" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:6.701ex; height:2.843ex;" alt="{\displaystyle e=\left|\mathbf {e} \right|}"></span></dd></dl> <p>dove <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \mathbf {e} }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="bold">e</mi> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \mathbf {e} }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/8b904155833429dc023056b5b9609c4a679d7064" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.225ex; height:1.676ex;" alt="{\displaystyle \mathbf {e} }"></span>, è il vettore eccentricità. </p><p>Per le <a href="/wiki/Orbita_ellittica" title="Orbita ellittica">orbite ellittiche</a> può anche essere calcolata come distanza tra l'<a href="/wiki/Apside" title="Apside">apoasse e il periasse</a> da <span class="nowrap"><i>r</i><sub>p</sub> = <i>a</i>(1 − <i>e</i>)</span> e <span class="nowrap"><i>r</i><sub>a</sub> = <i>a</i>(1 + <i>e</i>)</span>, dove <i>a</i> è il <a href="/wiki/Semiasse_maggiore" title="Semiasse maggiore">semiasse maggiore</a>. </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle e={{r_{a}-r_{p}} \over {r_{a}+r_{p}}}=1-{\frac {2}{{\frac {r_{a}}{r_{p}}}+1}}={\frac {2}{{\frac {r_{p}}{r_{a}}}+1}}-1}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>e</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow class="MJX-TeXAtom-ORD"> <msub> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>a</mi> </mrow> </msub> <mo>−</mo> <msub> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>p</mi> </mrow> </msub> </mrow> <mrow class="MJX-TeXAtom-ORD"> <msub> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>a</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>p</mi> </mrow> </msub> </mrow> </mfrac> </mrow> <mo>=</mo> <mn>1</mn> <mo>−</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mn>2</mn> <mrow> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <msub> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>a</mi> </mrow> </msub> <msub> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>p</mi> </mrow> </msub> </mfrac> </mrow> <mo>+</mo> <mn>1</mn> </mrow> </mfrac> </mrow> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mn>2</mn> <mrow> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <msub> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>p</mi> </mrow> </msub> <msub> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>a</mi> </mrow> </msub> </mfrac> </mrow> <mo>+</mo> <mn>1</mn> </mrow> </mfrac> </mrow> <mo>−</mo> <mn>1</mn> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle e={{r_{a}-r_{p}} \over {r_{a}+r_{p}}}=1-{\frac {2}{{\frac {r_{a}}{r_{p}}}+1}}={\frac {2}{{\frac {r_{p}}{r_{a}}}+1}}-1}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/82629c1dba8d53bcebc5bbf83a0e9d817b47a698" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -3.671ex; width:40.893ex; height:7.176ex;" alt="{\displaystyle e={{r_{a}-r_{p}} \over {r_{a}+r_{p}}}=1-{\frac {2}{{\frac {r_{a}}{r_{p}}}+1}}={\frac {2}{{\frac {r_{p}}{r_{a}}}+1}}-1}"></span></dd></dl> <p>dove: </p> <ul><li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle r_{p}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>p</mi> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle r_{p}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/d02ec163fac8837ac757005d783b375e52808b97" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.005ex; width:2.108ex; height:2.343ex;" alt="{\displaystyle r_{p}}"></span> è il raggio di pericentro,</li> <li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle r_{a}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>a</mi> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle r_{a}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/da5f0781a46ba20129a554237056b6ade78b956f" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:2.151ex; height:2.009ex;" alt="{\displaystyle r_{a}}"></span> è il raggio di apocentro.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Esempi">Esempi</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Eccentricit%C3%A0_orbitale&veaction=edit&section=3" title="Modifica la sezione Esempi" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Eccentricit%C3%A0_orbitale&action=edit&section=3" title="Edit section's source code: Esempi"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable floatright"> <caption>Eccentricità di oggetti del sistema solare </caption> <tbody><tr> <th>Oggetto</th> <th>eccentricità </th></tr> <tr> <td><a href="/wiki/Tritone_(astronomia)" title="Tritone (astronomia)">Tritone</a></td> <td>0,00002 </td></tr> <tr> <td><a href="/wiki/Venere_(astronomia)" title="Venere (astronomia)">Venere</a></td> <td>0,0068 </td></tr> <tr> <td><a href="/wiki/Nettuno_(astronomia)" title="Nettuno (astronomia)">Nettuno</a></td> <td>0,0086 </td></tr> <tr> <td><a href="/wiki/Terra" title="Terra">Terra</a></td> <td>0,0167 </td></tr> <tr> <td><a href="/wiki/Titano_(astronomia)" title="Titano (astronomia)">Titano</a></td> <td>0,0288 </td></tr> <tr> <td><a href="/wiki/Urano_(astronomia)" title="Urano (astronomia)">Urano</a></td> <td>0,0472 </td></tr> <tr> <td><a href="/wiki/Giove_(astronomia)" title="Giove (astronomia)">Giove</a></td> <td>0,0484 </td></tr> <tr> <td><a href="/wiki/Saturno_(astronomia)" title="Saturno (astronomia)">Saturno</a></td> <td>0,0541 </td></tr> <tr> <td><a href="/wiki/Luna" title="Luna">Luna</a></td> <td>0,0549 </td></tr> <tr> <td><a href="/wiki/Cerere_(astronomia)" title="Cerere (astronomia)">Cerere</a></td> <td>0,0758 </td></tr> <tr> <td><a href="/wiki/4_Vesta" title="4 Vesta">4 Vesta</a></td> <td>0,0887 </td></tr> <tr> <td><a href="/wiki/Marte_(astronomia)" title="Marte (astronomia)">Marte</a></td> <td>0,0934 </td></tr> <tr> <td><a href="/wiki/10_Hygiea" title="10 Hygiea">10 Hygiea</a></td> <td>0,1146 </td></tr> <tr> <td><a href="/wiki/Makemake_(astronomia)" title="Makemake (astronomia)">Makemake</a></td> <td>0,1559 </td></tr> <tr> <td><a href="/wiki/Haumea_(astronomia)" title="Haumea (astronomia)">Haumea</a></td> <td>0,1887 </td></tr> <tr> <td><a href="/wiki/Mercurio_(astronomia)" title="Mercurio (astronomia)">Mercurio</a></td> <td>0,2056 </td></tr> <tr> <td><a href="/wiki/2_Pallas" title="2 Pallas">2 Pallas</a></td> <td>0,2313 </td></tr> <tr> <td><a href="/wiki/Plutone_(astronomia)" title="Plutone (astronomia)">Plutone</a></td> <td>0,2488 </td></tr> <tr> <td><a href="/wiki/3_Juno" title="3 Juno">3 Juno</a></td> <td>0,2555 </td></tr> <tr> <td><a href="/wiki/324_Bamberga" title="324 Bamberga">324 Bamberga</a></td> <td>0,3400 </td></tr> <tr> <td><a href="/wiki/Eris_(astronomia)" title="Eris (astronomia)">Eris</a></td> <td>0,4407 </td></tr> <tr> <td><a href="/wiki/Nereide_(astronomia)" title="Nereide (astronomia)">Nereide</a></td> <td>0,7507 </td></tr> <tr> <td><a href="/wiki/90377_Sedna" title="90377 Sedna">Sedna</a></td> <td>0,8549 </td></tr> <tr> <td><a href="/wiki/Cometa_di_Halley" title="Cometa di Halley">Cometa di Halley</a></td> <td>0,9671 </td></tr> <tr> <td><a href="/wiki/Cometa_Hale-Bopp" title="Cometa Hale-Bopp">Cometa Hale-Bopp</a></td> <td>0,9951 </td></tr> <tr> <td><a href="/wiki/C/1965_S1_Ikeya-Seki" title="C/1965 S1 Ikeya-Seki">Cometa Ikeya-Seki</a></td> <td>0,9999 </td></tr> <tr> <td><a href="/wiki/C/1980_E1_Bowell" title="C/1980 E1 Bowell">C/1980 E1 Bowell</a></td> <td>1.057 </td></tr> <tr> <td><a href="/wiki/1I/%27Oumuamua" title="1I/'Oumuamua">1I/'Oumuamua</a></td> <td>1.20<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/2I/Borisov" title="2I/Borisov">2I/Borisov</a></td> <td>3.5<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </td></tr></tbody></table> <p>L'eccentricità dell'<a href="/wiki/Orbita_della_Terra" title="Orbita della Terra">orbita terrestre</a> è attualmente di circa 0,0167 ed è quasi circolare. <a href="/wiki/Venere_(astronomia)" title="Venere (astronomia)">Venere</a> e <a href="/wiki/Nettuno_(astronomia)" title="Nettuno (astronomia)">Nettuno</a> hanno eccentricità ancora più basse. Nel corso di centinaia di migliaia di anni, l'eccentricità dell'orbita terrestre varia da quasi 0,0034 a quasi 0,058 a causa delle attrazioni gravitazionali con gli altri <a href="/wiki/Pianeta" title="Pianeta">pianeti</a>.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>La tabella a destra mostra le eccentricità orbitali di tutti i pianeti e pianeti nani, e di alcuni asteroidi, comete e satelliti naturali. <a href="/wiki/Mercurio_(astronomia)" title="Mercurio (astronomia)">Mercurio</a> ha la più grande eccentricità orbitale di qualsiasi pianeta del <a href="/wiki/Sistema_solare" title="Sistema solare">sistema solare</a> (<i>e</i> = 0,2056). Tale eccentricità è sufficiente affinché Mercurio riceva il doppio dell'irradiazione solare al perielio rispetto all'afelio. Prima della sua retrocessione dallo stato di pianeta nel 2006, <a href="/wiki/Plutone_(astronomia)" title="Plutone (astronomia)">Plutone</a> era considerato il pianeta con l'orbita più eccentrica (<i>e</i> = 0,248). Altri <a href="/wiki/Oggetto_transnettuniano" title="Oggetto transnettuniano">oggetti transnettuniani</a> hanno un'eccentricità significativa, in particolare il <a href="/wiki/Pianeta_nano" title="Pianeta nano">pianeta nano</a> <a href="/wiki/Eris_(astronomia)" title="Eris (astronomia)">Eris</a> (0,44). Ancora più lontano, <a href="/wiki/90377_Sedna" title="90377 Sedna">Sedna</a>, ha un'eccentricità estremamente elevata di 0,855, con un afelio a 937 UA e un perielio a circa 76 UA. </p><p>La maggior parte degli <a href="/wiki/Asteroide" title="Asteroide">asteroidi</a> del sistema solare hanno eccentricità orbitali comprese tra 0 e 0,35 con un valore medio di 0,17. Le loro eccentricità relativamente elevate sono probabilmente dovute all'influenza di <a href="/wiki/Giove_(astronomia)" title="Giove (astronomia)">Giove</a> e alle <a href="/wiki/Impatto_astronomico" title="Impatto astronomico">collisioni</a> del passato. </p><p>Il valore dell'<a href="/wiki/Orbita_della_Luna" title="Orbita della Luna">orbita lunare</a> è 0,0549; è l'orbita più eccentrica tra i grandi satelliti del sistema solare. Le <a href="/wiki/Satelliti_medicei" title="Satelliti medicei">quattro lune galileiane</a> hanno un'eccentricità <0,01. La più grande luna di Nettuno, <a href="/wiki/Tritone_(astronomia)" title="Tritone (astronomia)">Tritone</a>, ha un'eccentricità di 1,6 × 10<sup>-5</sup> (0,000016), la più piccola eccentricità di qualsiasi satellite conosciuto nel sistema solare; la sua orbita è quasi un cerchio perfetto.<sup id="cite_ref-Tritone_4-0" class="reference"><a href="#cite_note-Tritone-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> Tuttavia, le lune più piccole, in particolare le <a href="/wiki/Luna_irregolare" class="mw-redirect" title="Luna irregolare">lune irregolari</a>, possono avere un'alta eccentricità, come la terza luna più grande di Nettuno, <a href="/wiki/Nereide_(astronomia)" title="Nereide (astronomia)">Nereide</a> (0,75). </p><p>Le <a href="/wiki/Comete" class="mw-redirect" title="Comete">comete</a> hanno valori di eccentricità molto diversi. Quelle <a href="/wiki/Cometa_periodica" title="Cometa periodica">periodiche</a> hanno eccentricità per lo più comprese tra 0,2 e 0,7,<sup id="cite_ref-Comets_5-0" class="reference"><a href="#cite_note-Comets-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> ma alcune di esse hanno <a href="/wiki/Orbita_ellittica" title="Orbita ellittica">orbite ellittiche</a> altamente eccentriche con eccentricità appena inferiori a 1, ad esempio, la <a href="/wiki/Cometa_di_Halley" title="Cometa di Halley">cometa di Halley</a> ha un valore di 0,967. Le <a href="/wiki/Cometa_non_periodica" title="Cometa non periodica">comete non periodiche</a> seguono orbite quasi paraboliche e quindi hanno eccentricità ancora più vicine a 1. Gli esempi includono la <a href="/wiki/Cometa_Hale-Bopp" title="Cometa Hale-Bopp">cometa Hale-Bopp</a> con un valore di 0,995 e la <a href="/wiki/C/2006_P1_McNaught" title="C/2006 P1 McNaught">cometa McNaught</a> con un valore di 1,000019. Poiché il valore della Hale-Bopp è inferiore a 1, la sua orbita è ellittica e quindi tornerà. La cometa McNaught ha un'<a href="/wiki/Orbita_iperbolica" class="mw-redirect" title="Orbita iperbolica">orbita iperbolica</a> sotto l'influenza dei pianeti, ma è ancora legata al Sole con un <a href="/wiki/Periodo_di_rivoluzione" title="Periodo di rivoluzione">periodo orbitale</a> di circa 105 anni. In un'epoca del 2010, la cometa <a href="/wiki/C/1980_E1_Bowell" title="C/1980 E1 Bowell">C/1980 E1 Bowell</a> ha la più grande eccentricità di qualsiasi cometa iperbolica conosciuta, con un'eccentricità di 1,057, e alla fine lascerà il sistema solare.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p><p><a href="/wiki/1I/%27Oumuamua" title="1I/'Oumuamua">1I/'Oumuamua</a> è il primo <a href="/w/index.php?title=Oggetto_interstellare&action=edit&redlink=1" class="new" title="Oggetto interstellare (la pagina non esiste)">oggetto interstellare</a> osservato mentre attraversava il sistema solare. La sua eccentricità orbitale di 1,20 indica che 'Oumuamua non è mai stato legato gravitazionalmente al nostro sole. È stato scoperto a 0,2 UA dalla Terra ed ha un diametro di circa 200 metri. Ha una velocità interstellare (velocità all'infinito) di 26,33 km/s. </p> <div class="mw-heading mw-heading2"><h2 id="Pianeti_extrasolari">Pianeti extrasolari</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Eccentricit%C3%A0_orbitale&veaction=edit&section=4" title="Modifica la sezione Pianeti extrasolari" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Eccentricit%C3%A0_orbitale&action=edit&section=4" title="Edit section's source code: Pianeti extrasolari"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La maggior parte dei tanti <a href="/wiki/Pianeta_extrasolare" title="Pianeta extrasolare">esopianeti</a> scoperti ha un'eccentricità orbitale maggiore rispetto ai pianeti nel nostro <a href="/wiki/Sistema_planetario" title="Sistema planetario">sistema planetario</a>. Gli esopianeti trovati con una bassa eccentricità orbitale (orbite quasi circolari) sono molto vicini alla loro stella e sono in <a href="/wiki/Rotazione_sincrona" title="Rotazione sincrona">rotazione sincrona</a> attorno a essa. Tutti gli otto pianeti del Sistema Solare hanno orbite quasi circolari, gli esopianeti scoperti mostrano che il sistema solare, con la sua eccentricità insolitamente bassa, è molto raro.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p><p>Una teoria attribuisce questa bassa eccentricità all'elevato numero di pianeti nel sistema solare; un altro suggerisce che sia sorto a causa delle sue <a href="/wiki/Cintura_asteroidale" title="Cintura asteroidale">cinture di asteroidi</a> uniche. Sono stati trovati alcuni altri sistemi multiplanetari, ma nessuno assomiglia al sistema solare, con i pianeti che hanno orbite quasi circolari. I sistemi di <a href="/wiki/Planetesimi" class="mw-redirect" title="Planetesimi">planetesimi</a> solari includono la <a href="/wiki/Fascia_principale" title="Fascia principale">fascia principale</a>, la <a href="/wiki/Famiglia_Hilda" title="Famiglia Hilda">famiglia Hilda</a>, la <a href="/wiki/Fascia_di_Kuiper" title="Fascia di Kuiper">fascia di Kuiper</a>, la <a href="/w/index.php?title=Nube_di_Hills&action=edit&redlink=1" class="new" title="Nube di Hills (la pagina non esiste)">nube di Hills</a> e la <a href="/wiki/Nube_di_Oort" title="Nube di Oort">nube di Oort</a>. Molti dei sistemi di pianeti extrasolari scoperti non hanno un sistema di planetesimi e non sono sistemi molto vasti. È necessaria una bassa eccentricità per l'<a href="/wiki/Abitabilit%C3%A0_planetaria" title="Abitabilità planetaria">abitabilità planetaria</a>, specialmente per la vita complessa.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> È probabile che all'aumentare della molteplicità di un sistema l'eccentricità orbitale in generale diminuisca, favorendo l'abitabilità planetaria.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> Anche l'<a href="/wiki/Ipotesi_della_grande_virata" title="Ipotesi della grande virata">ipotesi della grande virata</a> aiuta a comprendere le orbite quasi circolari e altre caratteristiche uniche del sistema solare.<sup id="cite_ref-Zubritsky_2011_10-0" class="reference"><a href="#cite_note-Zubritsky_2011-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Sanders_2011_11-0" class="reference"><a href="#cite_note-Sanders_2011-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Choi_2015_12-0" class="reference"><a href="#cite_note-Choi_2015-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> </p><p><a href="/wiki/HD_20782_b" title="HD 20782 b">HD 20782 b</a> è il pianeta con l'orbita più eccentrica conosciuta, con <i>e</i> = 0,97. Ha un semiasse maggiore di 1,38 UA, tuttavia la sua distanza dalla stella varia da appena 0,1 UA, quando si trova al <a href="/wiki/Periastro" class="mw-redirect" title="Periastro">periastro</a>, a 2,6 UA quando passa per l'apoastro. </p> <div class="mw-heading mw-heading2"><h2 id="Note">Note</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Eccentricit%C3%A0_orbitale&veaction=edit&section=5" title="Modifica la sezione Note" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Eccentricit%C3%A0_orbitale&action=edit&section=5" title="Edit section's source code: Note"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><a href="#cite_ref-1"><b>^</b></a> <span class="reference-text">'Oumuamua non è mai stato legato al Sole.</span> </li> <li id="cite_note-2"><a href="#cite_ref-2"><b>^</b></a> <span class="reference-text">2I/Borisov non è mai stata legata al Sole.</span> </li> <li id="cite_note-3"><a href="#cite_ref-3"><b>^</b></a> <span class="reference-text"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20180106070653/http://www.museum.state.il.us/exhibits/ice_ages/eccentricity_graph.html">Graph of the eccentricity of the Earth's orbit</a> Berger and Loutre (1991)</span> </li> <li id="cite_note-Tritone-4"><a href="#cite_ref-Tritone_4-0"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> David R. Williams, <a rel="nofollow" class="external text" href="https://nssdc.gsfc.nasa.gov/planetary/factsheet/neptuniansatfact.html"><span style="font-style:italic;">Neptunian Satellite Fact Sheet</span></a>, su <span style="font-style:italic;">nssdc.gsfc.nasa.gov</span>, NASA.</cite></span> </li> <li id="cite_note-Comets-5"><a href="#cite_ref-Comets_5-0"><b>^</b></a> <span class="reference-text"><cite class="citation libro" style="font-style:normal"> John Lewis, <a rel="nofollow" class="external text" href="https://books.google.com/books?id=35uwarLgVLsC&pg=PA281"><span style="font-style:italic;">Physics and Chemistry of the Solar System</span></a>, Academic Press, 2012, <a href="/wiki/ISBN" title="ISBN">ISBN</a> <a href="/wiki/Speciale:RicercaISBN/9780323145848" title="Speciale:RicercaISBN/9780323145848">9780323145848</a>.</cite></span> </li> <li id="cite_note-6"><a href="#cite_ref-6"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=1980E1"><span style="font-style:italic;">JPL Small-Body Database Browser: C/1980 E1 (Bowell)</span></a>, su <span style="font-style:italic;">ssd.jpl.nasa.gov</span>.</cite></span> </li> <li id="cite_note-7"><a href="#cite_ref-7"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="http://exoplanets.org/ecc.html"><span style="font-style:italic;">Orbital eccentricites</span></a>, su <span style="font-style:italic;">exoplanets.org</span>.</cite></span> </li> <li id="cite_note-8"><a href="#cite_ref-8"><b>^</b></a> <span class="reference-text"><cite class="citation libro" style="font-style:normal"> Peter Ward, Donald Brownlee, <a rel="nofollow" class="external text" href="https://archive.org/details/rareearthwhycomp00ward"><span style="font-style:italic;">Rare Earth: Why Complex Life is Uncommon in the Universe</span></a>, Springer, 2000, pp. <a rel="nofollow" class="external text" href="https://archive.org/details/rareearthwhycomp00ward/page/122">122</a>–123, <a href="/wiki/ISBN" title="ISBN">ISBN</a> <a href="/wiki/Speciale:RicercaISBN/0-387-98701-0" title="Speciale:RicercaISBN/0-387-98701-0">0-387-98701-0</a>.</cite></span> </li> <li id="cite_note-9"><a href="#cite_ref-9"><b>^</b></a> <span class="reference-text"><cite class="citation pubblicazione" style="font-style:normal"> MA Limbach; EL Turner, <a rel="nofollow" class="external text" href="https://oadoi.org/10.1073/pnas.1406545111"><span style="font-style:italic;">Exoplanet orbital eccentricity: multiplicity relation and the Solar System</span></a>, in <span style="font-style:italic;">Proc Natl Acad Sci U S A</span>, vol. 112, n. 1, 2015, pp. 20–4, <a href="/wiki/Digital_object_identifier" title="Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1073%2Fpnas.1406545111">10.1073/pnas.1406545111</a>, <a href="/wiki/PMID" title="PMID">PMID</a> <a rel="nofollow" class="external text" href="//www.ncbi.nlm.nih.gov/pubmed/25512527">25512527</a>, <a href="/wiki/ArXiv" title="ArXiv">arXiv</a>:<a rel="nofollow" class="external text" href="http://arxiv.org/abs/1404.2552">1404.2552</a>.</cite></span> </li> <li id="cite_note-Zubritsky_2011-10"><a href="#cite_ref-Zubritsky_2011_10-0"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> Elizabeth Zubritsky, <a rel="nofollow" class="external text" href="https://web.archive.org/web/20110609234138/http://www.nasa.gov/topics/solarsystem/features/young-jupiter.html"><span style="font-style:italic;">Jupiter's Youthful Travels Redefined Solar System</span></a>, su <span style="font-style:italic;">nasa.gov</span>, <a href="/wiki/NASA" title="NASA">NASA</a>. <small>URL consultato il 10 febbraio 2021</small> <small>(archiviato dall'<abbr title="http://www.nasa.gov/topics/solarsystem/features/young-jupiter.html">url originale</abbr> il 9 giugno 2011)</small>.</cite></span> </li> <li id="cite_note-Sanders_2011-11"><a href="#cite_ref-Sanders_2011_11-0"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> Ray Sanders, <a rel="nofollow" class="external text" href="http://www.universetoday.com/88374/how-did-jupiter-shape-our-solar-system/"><span style="font-style:italic;">How Did Jupiter Shape Our Solar System?</span></a>, su <span style="font-style:italic;">universetoday.com</span>, <a href="/wiki/Universe_Today" title="Universe Today">Universe Today</a>.</cite></span> </li> <li id="cite_note-Choi_2015-12"><a href="#cite_ref-Choi_2015_12-0"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> Charles Q. Choi, <a rel="nofollow" class="external text" href="http://www.space.com/28901-wandering-jupiter-oddball-solar-system.html"><span style="font-style:italic;">Jupiter's 'Smashing' Migration May Explain Our Oddball Solar System</span></a>, su <span style="font-style:italic;">space.com</span>, <a href="/wiki/Space.com" title="Space.com">Space.com</a>.</cite></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Voci_correlate">Voci correlate</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Eccentricit%C3%A0_orbitale&veaction=edit&section=6" title="Modifica la sezione Voci correlate" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Eccentricit%C3%A0_orbitale&action=edit&section=6" title="Edit section's source code: Voci correlate"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Vettore_eccentricit%C3%A0" title="Vettore eccentricità">Vettore eccentricità</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Collegamenti_esterni">Collegamenti esterni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Eccentricit%C3%A0_orbitale&veaction=edit&section=7" title="Modifica la sezione Collegamenti esterni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Eccentricit%C3%A0_orbitale&action=edit&section=7" title="Edit section's source code: Collegamenti esterni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="http://scienceworld.wolfram.com/physics/Eccentricity.html"><span style="font-style:italic;">Mondo della Fisica: eccentricità</span></a>, su <span style="font-style:italic;">scienceworld.wolfram.com</span>.</cite></li> <li><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20180106070653/http://www.museum.state.il.us/exhibits/ice_ages/eccentricity_graph.html"><span style="font-style:italic;">Variazione dell'eccentricità dell'orbita terrestre</span></a>, su <span style="font-style:italic;">museum.state.il.us</span>. <small>URL consultato il 4 luglio 2005</small> <small>(archiviato dall'<abbr title="http://www.museum.state.il.us/exhibits/ice_ages/eccentricity_graph.html">url originale</abbr> il 6 gennaio 2018)</small>.</cite></li></ul> <div class="noprint" style="width:100%; padding: 3px 0; display: flex; flex-wrap: wrap; row-gap: 4px; column-gap: 8px; box-sizing: border-box;"><div style="flex-grow: 1"><style data-mw-deduplicate="TemplateStyles:r140555418">.mw-parser-output .itwiki-template-occhiello{width:100%;line-height:25px;border:1px solid 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vector-search-box"> <h3 >Ricerca</h3> <form action="/w/index.php" id="searchform" class="vector-search-box-form"> <div id="simpleSearch" class="vector-search-box-inner" data-search-loc="header-navigation"> <input class="vector-search-box-input" type="search" name="search" placeholder="Cerca in Wikipedia" aria-label="Cerca in Wikipedia" autocapitalize="sentences" title="Cerca in Wikipedia [f]" accesskey="f" id="searchInput" > <input type="hidden" name="title" value="Speciale:Ricerca"> <input id="mw-searchButton" class="searchButton mw-fallbackSearchButton" type="submit" name="fulltext" title="Cerca il testo indicato nelle pagine" value="Ricerca"> <input id="searchButton" class="searchButton" type="submit" name="go" title="Vai a una pagina con il titolo indicato, se esiste" value="Vai"> </div> </form> </div> </div> </div> <div id="mw-panel" class="vector-legacy-sidebar"> <div id="p-logo" role="banner"> <a class="mw-wiki-logo" href="/wiki/Pagina_principale" title="Visita la pagina principale"></a> </div> <nav id="p-navigation" class="mw-portlet mw-portlet-navigation vector-menu-portal portal vector-menu" aria-labelledby="p-navigation-label" > <h3 id="p-navigation-label" class="vector-menu-heading " > <span class="vector-menu-heading-label">Navigazione</span> </h3> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage-description" class="mw-list-item"><a href="/wiki/Pagina_principale" title="Visita la pagina principale [z]" accesskey="z"><span>Pagina principale</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Speciale:UltimeModifiche" title="Elenco delle ultime modifiche del sito [r]" accesskey="r"><span>Ultime modifiche</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Speciale:PaginaCasuale" title="Mostra una pagina a caso [x]" accesskey="x"><span>Una voce a caso</span></a></li><li id="n-nearby-pages-title" class="mw-list-item"><a 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class="mw-list-item"><a href="/wiki/Wikipedia:Bar"><span>Bar</span></a></li><li id="n-wikipediano" class="mw-list-item"><a href="/wiki/Wikipedia:Wikipediano"><span>Il Wikipediano</span></a></li><li id="n-sitesupport" class="mw-list-item"><a href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_it.wikipedia.org&uselang=it" title="Sostienici"><span>Fai una donazione</span></a></li><li id="n-contactpage" class="mw-list-item"><a href="/wiki/Wikipedia:Contatti"><span>Contatti</span></a></li> </ul> </div> </nav> <nav id="p-tb" class="mw-portlet mw-portlet-tb vector-menu-portal portal vector-menu" aria-labelledby="p-tb-label" > <h3 id="p-tb-label" class="vector-menu-heading " > <span class="vector-menu-heading-label">Strumenti</span> </h3> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Speciale:PuntanoQui/Eccentricit%C3%A0_orbitale" title="Elenco di tutte le pagine che sono collegate a questa [j]" accesskey="j"><span>Puntano qui</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Speciale:ModificheCorrelate/Eccentricit%C3%A0_orbitale" rel="nofollow" title="Elenco delle ultime modifiche alle pagine collegate a questa [k]" accesskey="k"><span>Modifiche correlate</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Speciale:PagineSpeciali" title="Elenco di tutte le pagine speciali [q]" accesskey="q"><span>Pagine speciali</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Eccentricit%C3%A0_orbitale&oldid=139699154" title="Collegamento permanente a questa versione di questa pagina"><span>Link permanente</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Eccentricit%C3%A0_orbitale&action=info" title="Ulteriori informazioni su questa pagina"><span>Informazioni pagina</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Speciale:Cita&page=Eccentricit%C3%A0_orbitale&id=139699154&wpFormIdentifier=titleform" title="Informazioni su come citare questa pagina"><span>Cita questa voce</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Speciale:UrlShortener&url=https%3A%2F%2Fit.wikipedia.org%2Fwiki%2FEccentricit%25C3%25A0_orbitale"><span>Ottieni URL breve</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Speciale:QrCode&url=https%3A%2F%2Fit.wikipedia.org%2Fwiki%2FEccentricit%25C3%25A0_orbitale"><span>Scarica codice QR</span></a></li> </ul> </div> </nav> <nav id="p-coll-print_export" class="mw-portlet mw-portlet-coll-print_export vector-menu-portal portal vector-menu" aria-labelledby="p-coll-print_export-label" > <h3 id="p-coll-print_export-label" class="vector-menu-heading " > <span class="vector-menu-heading-label">Stampa/esporta</span> </h3> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Speciale:Libro&bookcmd=book_creator&referer=Eccentricit%C3%A0+orbitale"><span>Crea un libro</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Speciale:DownloadAsPdf&page=Eccentricit%C3%A0_orbitale&action=show-download-screen"><span>Scarica come PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Eccentricit%C3%A0_orbitale&printable=yes" title="Versione stampabile di questa pagina [p]" accesskey="p"><span>Versione stampabile</span></a></li> </ul> </div> </nav> <nav id="p-wikibase-otherprojects" class="mw-portlet mw-portlet-wikibase-otherprojects vector-menu-portal portal vector-menu" aria-labelledby="p-wikibase-otherprojects-label" > <h3 id="p-wikibase-otherprojects-label" class="vector-menu-heading " > <span class="vector-menu-heading-label">In altri progetti</span> </h3> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q208474" title="Collegamento all'elemento connesso dell'archivio dati [g]" accesskey="g"><span>Elemento Wikidata</span></a></li> </ul> </div> </nav> <nav id="p-lang" class="mw-portlet mw-portlet-lang vector-menu-portal portal vector-menu" aria-labelledby="p-lang-label" > <h3 id="p-lang-label" class="vector-menu-heading " > <span class="vector-menu-heading-label">In altre lingue</span> </h3> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Eksentrisiteit_(sterrekunde)" title="Eksentrisiteit (sterrekunde) - afrikaans" lang="af" hreflang="af" data-title="Eksentrisiteit (sterrekunde)" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Excentricidat" title="Excentricidat - aragonese" lang="an" hreflang="an" data-title="Excentricidat" data-language-autonym="Aragonés" data-language-local-name="aragonese" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%A7%D9%86%D8%AD%D8%B1%D8%A7%D9%81_%D9%85%D8%AF%D8%A7%D8%B1%D9%8A" title="انحراف مداري - arabo" lang="ar" hreflang="ar" data-title="انحراف مداري" data-language-autonym="العربية" data-language-local-name="arabo" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%AD%D0%BA%D1%81%D1%86%D1%8D%D0%BD%D1%82%D1%80%D1%8B%D1%81%D1%96%D1%82%D1%8D%D1%82_%D0%B0%D1%80%D0%B1%D1%96%D1%82%D1%8B" title="Эксцэнтрысітэт арбіты - bielorusso" lang="be" hreflang="be" data-title="Эксцэнтрысітэт арбіты" data-language-autonym="Беларуская" data-language-local-name="bielorusso" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%95%D0%BA%D1%81%D1%86%D0%B5%D0%BD%D1%82%D1%80%D0%B8%D1%86%D0%B8%D1%82%D0%B5%D1%82_(%D0%BE%D1%80%D0%B1%D0%B8%D1%82%D0%B0)" title="Ексцентрицитет (орбита) - bulgaro" lang="bg" hreflang="bg" data-title="Ексцентрицитет (орбита)" data-language-autonym="Български" data-language-local-name="bulgaro" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%95%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A7%80%E0%A6%AF%E0%A6%BC_%E0%A6%89%E0%A7%8E%E0%A6%95%E0%A7%87%E0%A6%A8%E0%A7%8D%E0%A6%A6%E0%A7%8D%E0%A6%B0%E0%A6%BF%E0%A6%95%E0%A6%A4%E0%A6%BE" title="কক্ষীয় উৎকেন্দ্রিকতা - bengalese" lang="bn" hreflang="bn" data-title="কক্ষীয় উৎকেন্দ্রিকতা" data-language-autonym="বাংলা" data-language-local-name="bengalese" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Excentricitat_orbital" title="Excentricitat orbital - catalano" lang="ca" hreflang="ca" data-title="Excentricitat orbital" data-language-autonym="Català" data-language-local-name="catalano" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Excentricita_dr%C3%A1hy" title="Excentricita dráhy - ceco" lang="cs" hreflang="cs" data-title="Excentricita dráhy" data-language-autonym="Čeština" data-language-local-name="ceco" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Excentricitet_(astronomi)" title="Excentricitet (astronomi) - danese" lang="da" hreflang="da" data-title="Excentricitet (astronomi)" data-language-autonym="Dansk" data-language-local-name="danese" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Exzentrizit%C3%A4t_(Astronomie)" title="Exzentrizität (Astronomie) - tedesco" lang="de" hreflang="de" data-title="Exzentrizität (Astronomie)" data-language-autonym="Deutsch" data-language-local-name="tedesco" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Orbital_eccentricity" title="Orbital eccentricity - inglese" lang="en" hreflang="en" data-title="Orbital eccentricity" data-language-autonym="English" data-language-local-name="inglese" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Excentricidad_orbital" title="Excentricidad orbital - spagnolo" lang="es" hreflang="es" data-title="Excentricidad orbital" data-language-autonym="Español" data-language-local-name="spagnolo" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Orbiidi_ekstsentrilisus" title="Orbiidi ekstsentrilisus - estone" lang="et" hreflang="et" data-title="Orbiidi ekstsentrilisus" data-language-autonym="Eesti" data-language-local-name="estone" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Eszentrikotasun_orbital" title="Eszentrikotasun orbital - basco" lang="eu" hreflang="eu" data-title="Eszentrikotasun orbital" data-language-autonym="Euskara" data-language-local-name="basco" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AE%D8%B1%D9%88%D8%AC_%D8%A7%D8%B2_%D9%85%D8%B1%DA%A9%D8%B2_%D9%85%D8%AF%D8%A7%D8%B1%DB%8C" title="خروج از مرکز مداری - persiano" lang="fa" hreflang="fa" data-title="خروج از مرکز مداری" data-language-autonym="فارسی" data-language-local-name="persiano" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Excentricit%C3%A9_orbitale" title="Excentricité orbitale - francese" lang="fr" hreflang="fr" data-title="Excentricité orbitale" data-language-autonym="Français" data-language-local-name="francese" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%95%E0%A4%95%E0%A5%8D%E0%A4%B7%E0%A5%80%E0%A4%AF_%E0%A4%B5%E0%A4%BF%E0%A4%95%E0%A5%87%E0%A4%A8%E0%A5%8D%E0%A4%A6%E0%A5%8D%E0%A4%B0%E0%A4%A4%E0%A4%BE" title="कक्षीय विकेन्द्रता - hindi" lang="hi" hreflang="hi" data-title="कक्षीय विकेन्द्रता" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Ekscentri%C4%8Dnost_orbite" title="Ekscentričnost orbite - croato" lang="hr" hreflang="hr" data-title="Ekscentričnost orbite" data-language-autonym="Hrvatski" data-language-local-name="croato" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Excentricit%C3%A1s_(csillag%C3%A1szat)" title="Excentricitás (csillagászat) - ungherese" lang="hu" hreflang="hu" data-title="Excentricitás (csillagászat)" data-language-autonym="Magyar" data-language-local-name="ungherese" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Eksentrisitas_orbit" title="Eksentrisitas orbit - indonesiano" lang="id" hreflang="id" data-title="Eksentrisitas orbit" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesiano" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E8%BB%8C%E9%81%93%E9%9B%A2%E5%BF%83%E7%8E%87" title="軌道離心率 - giapponese" lang="ja" hreflang="ja" data-title="軌道離心率" data-language-autonym="日本語" data-language-local-name="giapponese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-kab mw-list-item"><a href="https://kab.wikipedia.org/wiki/Annfal_amezzay" title="Annfal amezzay - cabilo" lang="kab" hreflang="kab" data-title="Annfal amezzay" data-language-autonym="Taqbaylit" data-language-local-name="cabilo" class="interlanguage-link-target"><span>Taqbaylit</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%AD%D0%BA%D1%81%D1%86%D0%B5%D0%BD%D1%82%D1%80%D0%B8%D1%81%D0%B8%D1%82%D0%B5%D1%82" title="Эксцентриситет - kazako" lang="kk" hreflang="kk" data-title="Эксцентриситет" data-language-autonym="Қазақша" data-language-local-name="kazako" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EA%B6%A4%EB%8F%84_%EC%9D%B4%EC%8B%AC%EB%A5%A0" title="궤도 이심률 - coreano" lang="ko" hreflang="ko" data-title="궤도 이심률" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Exzentrizit%C3%A9it_(Astronomie)" title="Exzentrizitéit (Astronomie) - lussemburghese" lang="lb" hreflang="lb" data-title="Exzentrizitéit (Astronomie)" data-language-autonym="Lëtzebuergesch" data-language-local-name="lussemburghese" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Orb%C4%ABtas_ekscentricit%C4%81te" title="Orbītas ekscentricitāte - lettone" lang="lv" hreflang="lv" data-title="Orbītas ekscentricitāte" data-language-autonym="Latviešu" data-language-local-name="lettone" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%BD%D0%BE_%D0%B7%D0%B0%D0%BD%D0%B5%D1%81%D1%83%D0%B2%D0%B0%D1%9A%D0%B5" title="Орбитално занесување - macedone" lang="mk" hreflang="mk" data-title="Орбитално занесување" data-language-autonym="Македонски" data-language-local-name="macedone" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%89%E0%B5%BD%E0%B4%95%E0%B5%87%E0%B4%A8%E0%B5%8D%E0%B4%A6%E0%B5%8D%E0%B4%B0%E0%B4%A4_(%E0%B4%9C%E0%B5%8D%E0%B4%AF%E0%B5%8B%E0%B4%A4%E0%B4%BF%E0%B4%B6%E0%B4%BE%E0%B4%B8%E0%B5%8D%E0%B4%A4%E0%B5%8D%E0%B4%B0%E0%B4%82)" title="ഉൽകേന്ദ്രത (ജ്യോതിശാസ്ത്രം) - malayalam" lang="ml" hreflang="ml" data-title="ഉൽകേന്ദ്രത (ജ്യോതിശാസ്ത്രം)" data-language-autonym="മലയാളം" data-language-local-name="malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%95%E0%A4%95%E0%A5%8D%E0%A4%B7%E0%A5%80%E0%A4%AF_%E0%A4%B5%E0%A4%95%E0%A5%8D%E0%A4%B0%E0%A4%A4%E0%A4%BE_%E0%A4%A8%E0%A4%BF%E0%A4%B0%E0%A5%8D%E0%A4%A6%E0%A5%87%E0%A4%B6%E0%A4%BE%E0%A4%82%E0%A4%95" title="कक्षीय वक्रता निर्देशांक - marathi" lang="mr" hreflang="mr" data-title="कक्षीय वक्रता निर्देशांक" data-language-autonym="मराठी" data-language-local-name="marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Kesipian_orbit" title="Kesipian orbit - malese" lang="ms" hreflang="ms" data-title="Kesipian orbit" data-language-autonym="Bahasa Melayu" data-language-local-name="malese" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Excentriciteit_(astronomie)" title="Excentriciteit (astronomie) - olandese" lang="nl" hreflang="nl" data-title="Excentriciteit (astronomie)" data-language-autonym="Nederlands" data-language-local-name="olandese" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Eksentrisitet" title="Eksentrisitet - norvegese nynorsk" lang="nn" hreflang="nn" data-title="Eksentrisitet" data-language-autonym="Norsk nynorsk" data-language-local-name="norvegese nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Baneeksentrisitet" title="Baneeksentrisitet - norvegese bokmål" lang="nb" hreflang="nb" data-title="Baneeksentrisitet" data-language-autonym="Norsk bokmål" data-language-local-name="norvegese bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Excentricitat_orbitala" title="Excentricitat orbitala - occitano" lang="oc" hreflang="oc" data-title="Excentricitat orbitala" data-language-autonym="Occitan" data-language-local-name="occitano" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Ekscentryczno%C5%9B%C4%87_(fizyka)" title="Ekscentryczność (fizyka) - polacco" lang="pl" hreflang="pl" data-title="Ekscentryczność (fizyka)" data-language-autonym="Polski" data-language-local-name="polacco" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Excentricidade_orbital" title="Excentricidade orbital - portoghese" lang="pt" hreflang="pt" data-title="Excentricidade orbital" data-language-autonym="Português" data-language-local-name="portoghese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Excentricitate_orbital%C4%83" title="Excentricitate orbitală - rumeno" lang="ro" hreflang="ro" data-title="Excentricitate orbitală" data-language-autonym="Română" data-language-local-name="rumeno" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%AD%D0%BA%D1%81%D1%86%D0%B5%D0%BD%D1%82%D1%80%D0%B8%D1%81%D0%B8%D1%82%D0%B5%D1%82_%D0%BE%D1%80%D0%B1%D0%B8%D1%82%D1%8B" title="Эксцентриситет орбиты - russo" lang="ru" hreflang="ru" data-title="Эксцентриситет орбиты" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Ekscentricitet_orbite" title="Ekscentricitet orbite - serbo-croato" lang="sh" hreflang="sh" data-title="Ekscentricitet orbite" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbo-croato" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B6%9A%E0%B6%9A%E0%B7%8A%E0%B7%82%E0%B7%93%E0%B6%BA_%E0%B6%8B%E0%B6%AD%E0%B7%8A%E0%B6%9A%E0%B7%9A%E0%B6%B1%E0%B7%8A%E0%B6%AF%E0%B7%8A%E2%80%8D%E0%B6%BB%E0%B7%92%E0%B6%BA%E0%B6%AD%E0%B7%8F%E0%B7%80%E0%B6%BA" title="කක්ෂීය උත්කේන්ද්‍රියතාවය - singalese" lang="si" hreflang="si" data-title="කක්ෂීය උත්කේන්ද්‍රියතාවය" data-language-autonym="සිංහල" data-language-local-name="singalese" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Orbital_eccentricity" title="Orbital eccentricity - Simple English" lang="en-simple" hreflang="en-simple" data-title="Orbital eccentricity" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Excentricita_(astron%C3%B3mia)" title="Excentricita (astronómia) - slovacco" lang="sk" hreflang="sk" data-title="Excentricita (astronómia)" data-language-autonym="Slovenčina" data-language-local-name="slovacco" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Izsrednost_tira" title="Izsrednost tira - sloveno" lang="sl" hreflang="sl" data-title="Izsrednost tira" data-language-autonym="Slovenščina" data-language-local-name="sloveno" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%95%D0%BA%D1%81%D1%86%D0%B5%D0%BD%D1%82%D1%80%D0%B8%D1%86%D0%B8%D1%82%D0%B5%D1%82_%D0%BE%D1%80%D0%B1%D0%B8%D1%82%D0%B5" title="Ексцентрицитет орбите - serbo" lang="sr" hreflang="sr" data-title="Ексцентрицитет орбите" data-language-autonym="Српски / srpski" data-language-local-name="serbo" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-su mw-list-item"><a href="https://su.wikipedia.org/wiki/%C3%89ks%C3%A9ntrisitas_orbit" title="Ékséntrisitas orbit - sundanese" lang="su" hreflang="su" data-title="Ékséntrisitas orbit" data-language-autonym="Sunda" data-language-local-name="sundanese" class="interlanguage-link-target"><span>Sunda</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Excentricitet_(astronomi)" title="Excentricitet (astronomi) - svedese" lang="sv" hreflang="sv" data-title="Excentricitet (astronomi)" data-language-autonym="Svenska" data-language-local-name="svedese" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%9A%E0%AF%81%E0%AE%B1%E0%AF%8D%E0%AE%B1%E0%AF%81%E0%AE%AA%E0%AF%8D%E0%AE%AA%E0%AE%BE%E0%AE%A4%E0%AF%88%E0%AE%AF%E0%AE%BF%E0%AE%A9%E0%AF%8D_%E0%AE%B5%E0%AE%9F%E0%AF%8D%E0%AE%9F%E0%AE%B5%E0%AE%BF%E0%AE%B2%E0%AE%95%E0%AE%B2%E0%AF%8D" title="சுற்றுப்பாதையின் வட்டவிலகல் - tamil" lang="ta" hreflang="ta" data-title="சுற்றுப்பாதையின் வட்டவிலகல்" data-language-autonym="தமிழ்" data-language-local-name="tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%84%E0%B8%A7%E0%B8%B2%E0%B8%A1%E0%B9%80%E0%B8%A2%E0%B8%B7%E0%B9%89%E0%B8%AD%E0%B8%87%E0%B8%A8%E0%B8%B9%E0%B8%99%E0%B8%A2%E0%B9%8C%E0%B8%81%E0%B8%A5%E0%B8%B2%E0%B8%87%E0%B8%82%E0%B8%AD%E0%B8%87%E0%B8%A7%E0%B8%87%E0%B9%82%E0%B8%84%E0%B8%88%E0%B8%A3" title="ความเยื้องศูนย์กลางของวงโคจร - thailandese" lang="th" hreflang="th" data-title="ความเยื้องศูนย์กลางของวงโคจร" data-language-autonym="ไทย" data-language-local-name="thailandese" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/D%C4%B1%C5%9F_merkezlik_(astronomi)" title="Dış merkezlik (astronomi) - turco" lang="tr" hreflang="tr" data-title="Dış merkezlik (astronomi)" data-language-autonym="Türkçe" data-language-local-name="turco" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%95%D0%BA%D1%81%D1%86%D0%B5%D0%BD%D1%82%D1%80%D0%B8%D1%81%D0%B8%D1%82%D0%B5%D1%82_%D0%BE%D1%80%D0%B1%D1%96%D1%82%D0%B8" title="Ексцентриситет орбіти - ucraino" lang="uk" hreflang="uk" data-title="Ексцентриситет орбіти" data-language-autonym="Українська" data-language-local-name="ucraino" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/%C4%90%E1%BB%99_l%E1%BB%87ch_t%C3%A2m_qu%E1%BB%B9_%C4%91%E1%BA%A1o" title="Độ lệch tâm quỹ đạo - vietnamita" lang="vi" hreflang="vi" data-title="Độ lệch tâm quỹ đạo" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E8%BD%A8%E9%81%93%E7%A6%BB%E5%BF%83%E7%8E%87" title="轨道离心率 - wu" lang="wuu" hreflang="wuu" data-title="轨道离心率" data-language-autonym="吴语" data-language-local-name="wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E8%BB%8C%E9%81%93%E9%9B%A2%E5%BF%83%E7%8E%87" title="軌道離心率 - cinese" lang="zh" hreflang="zh" data-title="軌道離心率" data-language-autonym="中文" data-language-local-name="cinese" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E8%BB%8C%E9%81%93%E9%9B%A2%E5%BF%83%E7%8E%87" title="軌道離心率 - cantonese" lang="yue" hreflang="yue" data-title="軌道離心率" data-language-autonym="粵語" data-language-local-name="cantonese" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q208474#sitelinks-wikipedia" 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