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style="background: #ddd;"><a href="/wiki/Markarian_galaxies" title="Markarian galaxies">Markarian</a> 1018</th></tr><tr><td colspan="2" class="infobox-image"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:The_active_galaxy_Markarian_1018.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/9a/The_active_galaxy_Markarian_1018.jpg/290px-The_active_galaxy_Markarian_1018.jpg" decoding="async" width="290" height="290" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/9a/The_active_galaxy_Markarian_1018.jpg/435px-The_active_galaxy_Markarian_1018.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/9a/The_active_galaxy_Markarian_1018.jpg/580px-The_active_galaxy_Markarian_1018.jpg 2x" data-file-width="800" data-file-height="800" /></a></span><div class="infobox-caption">The Seyfert galaxy Markarian 1018.</div></td></tr><tr><th colspan="2" class="infobox-header" style="background: #ddd;">Observation data (<a href="/wiki/J2000" class="mw-redirect" title="J2000">J2000</a> <a href="/wiki/Epoch_(astronomy)" title="Epoch (astronomy)">epoch</a>)</th></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Constellation" title="Constellation">Constellation</a></th><td class="infobox-data"><a href="/wiki/Cetus" title="Cetus">Cetus</a></td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Right_ascension" title="Right ascension">Right ascension</a></th><td class="infobox-data"><span class="nowrap">02<sup>h</sup> 06<sup>m</sup> 15.98<sup>s</sup></span></td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Declination" title="Declination">Declination</a></th><td class="infobox-data">−00° 17′ 29.23″</td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Redshift" title="Redshift">Redshift</a></th><td class="infobox-data">0.042957</td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Radial_velocity" title="Radial velocity">Heliocentric radial velocity</a></th><td class="infobox-data">12,878 <a href="/wiki/Kilometer_per_second" class="mw-redirect" title="Kilometer per second">km/s</a></td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Cosmic_distance_ladder" title="Cosmic distance ladder">Distance</a></th><td class="infobox-data">607 <a href="/wiki/Light_year" class="mw-redirect" title="Light year">Mly</a> (186.1 <a href="/wiki/Megaparsec" class="mw-redirect" title="Megaparsec">Mpc</a>)</td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Apparent_magnitude" title="Apparent magnitude">Apparent magnitude</a> <small title="in visual light">(V)</small></th><td class="infobox-data">15.5</td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Apparent_magnitude" title="Apparent magnitude">Apparent magnitude</a> <small title="in B band">(B)</small></th><td class="infobox-data">15.9</td></tr><tr><th colspan="2" class="infobox-header" style="background: #ddd;">Characteristics</th></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Galaxy_morphological_classification" title="Galaxy morphological classification">Type</a></th><td class="infobox-data">S0; merger?, Sy 1.5</td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;"><a href="/wiki/Angular_diameter" title="Angular diameter">Apparent size</a> <small title="in visual light">(V)</small></th><td class="infobox-data">0.99' x 0.52'</td></tr><tr><th scope="row" class="infobox-label" style="background: inherit;">Notable features</th><td class="infobox-data"><a href="/wiki/Seyfert_galaxy" title="Seyfert galaxy">Seyfert galaxy</a></td></tr><tr><th colspan="2" class="infobox-header" style="background: #ddd;">Other designations</th></tr><tr><td colspan="2" class="infobox-full-data"><a href="/wiki/Uppsala_General_Catalogue" title="Uppsala General Catalogue">UGC</a> 1597, <a href="/wiki/University_of_Michigan" title="University of Michigan">UM</a> 393, <a href="/wiki/Principal_Galaxy_Catalogue" class="mw-redirect" title="Principal Galaxy Catalogue">PGC</a> 8029, <a href="/wiki/Morphological_Catalogue_of_Galaxies" title="Morphological Catalogue of Galaxies">MCG</a> +00-06-030, <a href="/wiki/Catalogue_of_Galaxies_and_of_Clusters_of_Galaxies" title="Catalogue of Galaxies and of Clusters of Galaxies">CGCG</a> 387-034</td></tr></tbody></table> <p><b>Markarian 1018</b> (<b>Mrk 1018</b>), also known as <b>UGC 1597,</b> is a <a href="/wiki/Lenticular_galaxy" title="Lenticular galaxy">lenticular galaxy</a> with a <a href="/wiki/Peculiar_galaxy" title="Peculiar galaxy">peculiar</a> structure located in the constellation <a href="/wiki/Cetus" title="Cetus">Cetus</a>. It is located at an approximate distance of 607 million <a href="/wiki/Light-year" title="Light-year">light years</a> from <a href="/wiki/Earth" title="Earth">Earth</a> and has an apparent <a href="/wiki/Dimension" title="Dimension">dimensions</a> of 0.99 by 0.52 <a href="/wiki/Minute_and_second_of_arc" title="Minute and second of arc">arcmin</a>.<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> It is classified as a change looking <a href="/wiki/Seyfert_galaxy" title="Seyfert galaxy">Seyfert galaxy</a> and <a href="/wiki/Galaxy_merger" title="Galaxy merger">galaxy merger</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Characteristics">Characteristics</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Markarian_1018&action=edit&section=1" title="Edit section: Characteristics"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Markarian 1018 is a post merger product of two <a href="/wiki/Interacting_galaxy" title="Interacting galaxy">colliding galaxies</a> indicated by the presence of its disturbed galactic envelope, <a href="/wiki/Tidal_tail" title="Tidal tail">tidal tails</a> and a faint loop of light surrounding it.<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><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><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> It has a <a href="/wiki/Stellar_mass" title="Stellar mass">stellar mass</a> measured as log M<sub>*</sub>/M<sub>ʘ</sub> = 10.92 and a total <a href="/wiki/Star_formation" title="Star formation">star formation</a> of M<sub>ʘ</sub> yr<sup>-1</sup>.<sup id="cite_ref-:0_5-0" class="reference"><a href="#cite_note-:0-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> It has an <a href="/wiki/Active_galactic_nucleus" title="Active galactic nucleus">active galactic nucleus</a> (AGN) like most types of <a href="/wiki/Active_galaxies" class="mw-redirect" title="Active galaxies">active galaxies</a> with the energy source originating from an <a href="/wiki/Accretion_disk" title="Accretion disk">accretion disk</a> around its <a href="/wiki/Supermassive_black_hole" title="Supermassive black hole">supermassive black hole</a>. The mass of the black hole in Markarian 1018 varies however. In a 2011 study, its mass is around log (M<sub>BH</sub>/M<sub>ʘ</sub>) = 8.15 .<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> But later studies showed the mass is (M<sub>BH</sub>/M<sub>ʘ</sub>) = 7.4.<sup id="cite_ref-:1_7-0" class="reference"><a href="#cite_note-:1-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> and subsequently (M<sub>BH</sub>/M<sub>ʘ</sub>) = 7.84.<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> </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Markarian_1018.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Markarian_1018.jpg/220px-Markarian_1018.jpg" decoding="async" width="220" height="110" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Markarian_1018.jpg/330px-Markarian_1018.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Markarian_1018.jpg/440px-Markarian_1018.jpg 2x" data-file-width="864" data-file-height="432" /></a><figcaption>The black hole in the center of Markarian 1018 as observed by <a href="/wiki/Chandra_X-ray_Observatory" title="Chandra X-ray Observatory">Chandra X-ray Observatory</a>.</figcaption></figure> <p>The appearance of Markarian 1018 is known to shift from a bright to a dim state when observed in <a href="/wiki/X-ray" title="X-ray">X-rays</a> as well as both <a href="/wiki/Optics" title="Optics">optical</a> and <a href="/wiki/Ultraviolet" title="Ultraviolet">ultraviolet</a> models detected by <a href="/wiki/Hubble_Space_Telescope" title="Hubble Space Telescope">Hubble Space Telescope</a>, <a href="/wiki/Sloan_Digital_Sky_Survey" title="Sloan Digital Sky Survey">Sloan Digital Sky Survey</a> and <a href="/wiki/GALEX" title="GALEX">GALEX</a>. This is likely caused by the disruption of the fueling of its black hole by an interaction of a likely secondary black hole in the galaxy.<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><sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p><p>The AGN of Markarian 1018 is described change looking. It was originally a type 1.9 Seyfert galaxy. Between the years 1979 and 1984, it underwent a transition to become a type I. During the change, its ultraviolet and optical <a href="/wiki/Emission_spectrum" title="Emission spectrum">line emission</a> strengthened.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> However, Markarian 1018 has since changed back into type 1.9 after a period of 30 years. Its broad line <a href="/wiki/Flux" title="Flux">flux</a> declined with a Hα factor of 4.75 ± 0.5 while its broad <a href="/wiki/Spectral_line" title="Spectral line">emission lines</a> vanished.<sup id="cite_ref-:1_7-1" class="reference"><a href="#cite_note-:1-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> This makes the galaxy the first known change looking AGN to undergo two transitions in a full cycle.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> It also shows a very weak continuum with the presence of indistinctive <a href="/wiki/Hydrogen-alpha" title="Hydrogen-alpha">Hα</a> and <a href="/wiki/Balmer_series" title="Balmer series">Hβ</a> emission lines best fitted by a line component with a measurement of <a href="/wiki/Full_width_at_half_maximum" title="Full width at half maximum">FWHM</a> ≈ 7200 km s<sup>-1</sup>.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </p><p>The <a href="/wiki/X-ray" title="X-ray">X-ray</a> source of Markarian 1018 has gone through a <a href="/wiki/Spectral_line" title="Spectral line">spectral</a> variation. Between 2005 and 2019, its hardness <a href="/wiki/Ratio" title="Ratio">ratio</a> significantly increased from 0.2 ± 0.1 to 0.4 ± 0.1, between both the 0.5-2 and 2-10 <a href="/wiki/Electronvolt" title="Electronvolt">keV</a> bands. In additional, the broadband in the galaxy became dim, as the X-ray, ultraviolet and optical <a href="/wiki/Luminosity" title="Luminosity">luminosities</a> went down by factors of > 7, > 24 and ~ 9. This sharp decrease is suggested by lower ultraviolet emission. Further evidence also points out the hot medium properties of Markarian 1018 clearly remains the same while a warm component is found to cool down to a <a href="/wiki/Temperature" title="Temperature">temperature</a> of ~ 0.2 keV, suggesting the cooling process plays a major role in weakening the accretion disk's <a href="/wiki/Magnetic_field" title="Magnetic field">magnetic fields</a> and the cause of ultraviolet dimming.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </p><p>In late 2016, Markarian 1018 suddenly stopped dimming. It underwent a flaring period in which the galaxy showed an outburst; its <a href="/wiki/Magnitude_(astronomy)" title="Magnitude (astronomy)">magnitude</a> level rising by ~ 0.25 <a href="/wiki/U_band" title="U band">U-band</a> per month until early 2017 according to confirmation from Hubble and <a href="/wiki/Chandra_X-ray_Observatory" title="Chandra X-ray Observatory">Chandra X-ray Observatory</a>. Following resumption of monitoring in July 2017, it has since been only found ~ 0.4 magnitude higher than its flaring period.<sup id="cite_ref-:0_5-1" class="reference"><a href="#cite_note-:0-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> It has since gone through another outburst this time in 2020. While much of its <a href="/wiki/Visible_spectrum" title="Visible spectrum">optical spectrum</a> and primary X-ray flux remained constant, its 6.4 keV <a href="/wiki/Iron" title="Iron">iron</a> line strengthened through increased emission. This suggests the <a href="/wiki/Accretion_(astrophysics)" title="Accretion (astrophysics)">accretion</a> rate in Markarian 1018 has changed drastically in short-term.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Markarian_1018&action=edit&section=2" title="Edit section: References"><span>edit</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"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Obj_id&objid=5844&objname=1&img_stamp=YES&hconst=73.0&omegam=0.27&omegav=0.73&corr_z=1">"Your NED Search Results"</a>. <i>ned.ipac.caltech.edu</i><span class="reference-accessdate">. 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(March 2024). <a rel="nofollow" class="external text" href="https://dx.doi.org/10.1051/0004-6361/202348098">"Interpreting the long-term variability of the changing-look AGN Mrk 1018"</a>. <i>Astronomy & Astrophysics</i>. <b>683</b>: A131. <a href="/wiki/ArXiv_(identifier)" class="mw-redirect" title="ArXiv (identifier)">arXiv</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://arxiv.org/abs/2312.07663">2312.07663</a></span>. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2024A&A...683A.131V">2024A&A...683A.131V</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1051%2F0004-6361%2F202348098">10.1051/0004-6361/202348098</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0004-6361">0004-6361</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Astronomy+%26+Astrophysics&rft.atitle=Interpreting+the+long-term+variability+of+the+changing-look+AGN+Mrk+1018&rft.volume=683&rft.pages=A131&rft.date=2024-03&rft_id=info%3Aarxiv%2F2312.07663&rft.issn=0004-6361&rft_id=info%3Adoi%2F10.1051%2F0004-6361%2F202348098&rft_id=info%3Abibcode%2F2024A%26A...683A.131V&rft.aulast=Veronese&rft.aufirst=S.&rft.au=Vignali%2C+C.&rft.au=Severgnini%2C+P.&rft.au=Matzeu%2C+G.+A.&rft.au=Cignoni%2C+M.&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1051%2F0004-6361%2F202348098&rfr_id=info%3Asid%2Fen.wikipedia.org%3AMarkarian+1018" class="Z3988"></span></span> </li> <li id="cite_note-15"><span class="mw-cite-backlink"><b><a href="#cite_ref-15">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBroganKrumpeHomanUrrutia2023" class="citation journal cs1">Brogan, R.; Krumpe, M.; Homan, D.; Urrutia, T.; Granzer, T.; Husemann, B.; Neumann, J.; Gaspari, M.; Vaughan, S. P.; Croom, S. M.; Combes, F.; Pérez Torres, M.; Coil, A.; McElroy, R.; Winkel, N. (September 2023). <a rel="nofollow" class="external text" href="https://dx.doi.org/10.1051/0004-6361/202346475">"Still alive and kicking: A significant outburst in changing-look AGN Mrk 1018"</a>. <i>Astronomy & Astrophysics</i>. <b>677</b>: A116. <a href="/wiki/ArXiv_(identifier)" class="mw-redirect" title="ArXiv (identifier)">arXiv</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://arxiv.org/abs/2307.14139">2307.14139</a></span>. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2023A&A...677A.116B">2023A&A...677A.116B</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1051%2F0004-6361%2F202346475">10.1051/0004-6361/202346475</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0004-6361">0004-6361</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Astronomy+%26+Astrophysics&rft.atitle=Still+alive+and+kicking%3A+A+significant+outburst+in+changing-look+AGN+Mrk+1018&rft.volume=677&rft.pages=A116&rft.date=2023-09&rft_id=info%3Aarxiv%2F2307.14139&rft.issn=0004-6361&rft_id=info%3Adoi%2F10.1051%2F0004-6361%2F202346475&rft_id=info%3Abibcode%2F2023A%26A...677A.116B&rft.aulast=Brogan&rft.aufirst=R.&rft.au=Krumpe%2C+M.&rft.au=Homan%2C+D.&rft.au=Urrutia%2C+T.&rft.au=Granzer%2C+T.&rft.au=Husemann%2C+B.&rft.au=Neumann%2C+J.&rft.au=Gaspari%2C+M.&rft.au=Vaughan%2C+S.+P.&rft.au=Croom%2C+S.+M.&rft.au=Combes%2C+F.&rft.au=P%C3%A9rez+Torres%2C+M.&rft.au=Coil%2C+A.&rft.au=McElroy%2C+R.&rft.au=Winkel%2C+N.&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1051%2F0004-6361%2F202346475&rfr_id=info%3Asid%2Fen.wikipedia.org%3AMarkarian+1018" class="Z3988"></span></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Markarian_1018&action=edit&section=3" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>Markarian 1018 on <a href="/wiki/WikiSky" class="mw-redirect" title="WikiSky">WikiSky</a>: <a rel="nofollow" class="external text" href="http://www.wikisky.org/?object=Markarian+1018&img_source=DSS2">DSS2</a>, <a rel="nofollow" class="external text" href="http://www.wikisky.org/?object=Markarian+1018&img_source=SDSS">SDSS</a>, <a rel="nofollow" class="external text" href="http://www.wikisky.org/?object=Markarian+1018&img_source=GALEX">GALEX</a>, <a rel="nofollow" class="external text" href="http://www.wikisky.org/?object=Markarian+1018&img_source=IRAS">IRAS</a>, <a rel="nofollow" class="external text" href="http://www.wikisky.org/?object=Markarian+1018&img_source=HALPHA">Hydrogen α</a>, <a rel="nofollow" class="external text" href="http://www.wikisky.org/?object=Markarian+1018&img_source=RASS">X-Ray</a>, <a rel="nofollow" class="external text" href="http://www.wikisky.org/?object=Markarian+1018&img_source=IMG_all">Astrophoto</a>, <a rel="nofollow" class="external text" href="http://www.wikisky.org/?object=Markarian+1018">Sky Map</a>, <a rel="nofollow" class="external text" href="http://www.wikisky.org/starview?object=Markarian+1018">Articles and images</a></li> <li><a rel="nofollow" class="external text" href="https://simbad.u-strasbg.fr/simbad/sim-id?Ident=Mrk%201018">Mrk 1018 on SIMBAD</a></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output 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href="/wiki/Template:Cetus" title="Template:Cetus"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Cetus" title="Template talk:Cetus"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Cetus" title="Special:EditPage/Template:Cetus"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Constellation_of_Cetus" style="font-size:114%;margin:0 4em"><a href="/wiki/Cetus_(constellation)" class="mw-redirect" title="Cetus (constellation)">Constellation of Cetus</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="2" style="text-align: center;"><div> <ul><li><a href="/wiki/List_of_stars_in_Cetus" title="List of stars in Cetus">List of stars in Cetus</a></li> <li><a href="/wiki/Cetus_in_Chinese_astronomy" title="Cetus in Chinese astronomy">Cetus in Chinese astronomy</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:55px"><a href="/wiki/Star" title="Star">Stars</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:70px"><a href="/wiki/Bayer_designation" title="Bayer designation">Bayer</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Alpha_Ceti" title="Alpha Ceti">α (Menkar)</a></li> <li><a href="/wiki/Beta_Ceti" title="Beta Ceti">β (Diphda)</a></li> <li><a href="/wiki/Gamma_Ceti" title="Gamma Ceti">γ (Kaffaljidhma)</a></li> <li><a href="/wiki/Delta_Ceti" title="Delta Ceti">δ</a></li> <li><a href="/wiki/Epsilon_Ceti" title="Epsilon Ceti">ε</a></li> <li><a href="/wiki/Zeta_Ceti" title="Zeta Ceti">ζ (Baten Kaitos)</a></li> <li><a href="/wiki/Eta_Ceti" title="Eta Ceti">η</a></li> <li><a href="/wiki/Theta_Ceti" title="Theta Ceti">θ</a></li> <li><a href="/wiki/Iota_Ceti" title="Iota Ceti">ι</a></li> <li><a href="/wiki/Kappa1_Ceti" title="Kappa1 Ceti">κ<sup>1</sup></a></li> <li><a href="/wiki/Kappa2_Ceti" title="Kappa2 Ceti">κ<sup>2</sup></a></li> <li><a href="/wiki/Lambda_Ceti" title="Lambda Ceti">λ</a></li> <li><a href="/wiki/Mu_Ceti" title="Mu Ceti">μ</a></li> <li><a href="/wiki/Nu_Ceti" title="Nu Ceti">ν</a></li> <li><a href="/wiki/Xi1_Ceti" title="Xi1 Ceti">ξ<sup>1</sup></a></li> <li><a href="/wiki/Xi2_Ceti" title="Xi2 Ceti">ξ<sup>2</sup></a></li> <li><a href="/wiki/Mira" title="Mira">ο (Mira)</a> <ul><li><a href="/wiki/Mira_A" class="mw-redirect" title="Mira A">A</a></li> <li><a href="/wiki/Mira_B" title="Mira B">B</a></li></ul></li> <li><a href="/wiki/Pi_Ceti" title="Pi Ceti">π</a></li> <li><a href="/wiki/Rho_Ceti" title="Rho Ceti">ρ</a></li> <li><a href="/wiki/Sigma_Ceti" title="Sigma Ceti">σ</a></li> <li><a href="/wiki/Tau_Ceti" title="Tau Ceti">τ</a></li> <li><a href="/wiki/Upsilon_Ceti" title="Upsilon Ceti">υ</a></li> <li><a href="/wiki/Phi1_Ceti" title="Phi1 Ceti">φ<sup>1</sup></a></li> <li><a href="/wiki/Phi2_Ceti" title="Phi2 Ceti">φ<sup>2</sup></a></li> <li><a href="/wiki/Phi3_Ceti" title="Phi3 Ceti">φ<sup>3</sup></a></li> <li><a href="/wiki/Phi4_Ceti" title="Phi4 Ceti">φ<sup>4</sup></a></li> <li><a href="/wiki/Chi_Ceti" title="Chi Ceti">χ</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:70px"><a href="/wiki/Flamsteed_designation" title="Flamsteed designation">Flamsteed</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/1_Ceti" title="1 Ceti">1</a></li> <li><a href="/wiki/2_Ceti" title="2 Ceti">2</a></li> <li><a href="/wiki/3_Ceti" title="3 Ceti">3</a></li> <li><a href="/wiki/6_Ceti" title="6 Ceti">6</a></li> <li><a href="/wiki/7_Ceti" title="7 Ceti">7</a></li> <li><a href="/wiki/9_Ceti" title="9 Ceti">9</a></li> <li><a href="/wiki/13_Ceti" title="13 Ceti">13</a></li> <li><a href="/wiki/14_Ceti" title="14 Ceti">14</a></li> <li><a href="/wiki/20_Ceti" title="20 Ceti">20</a></li> <li><a href="/wiki/46_Ceti" title="46 Ceti">46</a></li> <li><a href="/wiki/49_Ceti" title="49 Ceti">49</a></li> <li><a href="/wiki/56_Ceti" title="56 Ceti">56 (υ<sup>1</sup>)</a></li> <li><a href="/wiki/63_Ceti" title="63 Ceti">63</a></li> <li><a href="/wiki/64_Ceti" title="64 Ceti">64</a></li> <li><a href="/wiki/69_Ceti" title="69 Ceti">69</a></li> <li><a href="/wiki/75_Ceti" title="75 Ceti">75</a></li> <li><a href="/wiki/77_Ceti" title="77 Ceti">77</a></li> <li><a href="/wiki/79_Ceti" title="79 Ceti">79</a></li> <li><a href="/wiki/81_Ceti" title="81 Ceti">81</a></li> <li><a href="/wiki/84_Ceti" title="84 Ceti">84</a></li> <li><a href="/wiki/94_Ceti" title="94 Ceti">94</a></li> <li><i><a href="/wiki/25_Arietis" title="25 Arietis">25 Ari</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:70px"><a href="/wiki/Variable_star_designation" class="mw-redirect" title="Variable star designation">Variable</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/T_Ceti" title="T Ceti">T</a></li> <li><a href="/wiki/Gliese_65" title="Gliese 65">UV</a></li> <li><a href="/wiki/YZ_Ceti" title="YZ Ceti">YZ</a></li> <li><a href="/wiki/Ross_548" title="Ross 548">ZZ</a></li> <li><a href="/wiki/AY_Ceti" title="AY Ceti">AY</a></li> <li><a href="/wiki/Gliese_65" title="Gliese 65">BL</a></li> <li><a href="/wiki/HD_9289" title="HD 9289">BW</a></li> <li><a href="/wiki/HD_12039" title="HD 12039">DK</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:70px"><a href="/wiki/Bright_Star_Catalogue" title="Bright Star Catalogue">HR</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/HD_256" title="HD 256">10</a></li> <li><a href="/wiki/HD_1461" title="HD 1461">72</a></li> <li><a href="/wiki/HD_3443" title="HD 3443">159</a></li> <li><a href="/wiki/HD_4732" title="HD 4732">228</a></li> <li><a href="/wiki/HD_10550" title="HD 10550">500</a></li> <li><a href="/wiki/HD_14214" title="HD 14214">672</a></li> <li><a href="/wiki/HD_18262" title="HD 18262">870</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:70px"><a href="/wiki/Henry_Draper_Catalogue" title="Henry Draper Catalogue">HD</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/HD_984" title="HD 984">984</a></li> <li><a href="/wiki/HD_1690" title="HD 1690">1690</a></li> <li><a href="/wiki/HD_2638" title="HD 2638">2638</a></li> <li><a href="/wiki/HD_4747" title="HD 4747">4747</a></li> <li><a href="/wiki/HD_5319" title="HD 5319">5319</a></li> <li><a href="/wiki/HD_6718" title="HD 6718">6718</a></li> <li><a href="/wiki/HD_7449" title="HD 7449">7449</a></li> <li><a href="/wiki/HD_11506" title="HD 11506">11506</a></li> <li><a href="/wiki/HD_11964" title="HD 11964">11964</a></li> <li><a href="/wiki/HD_15115" title="HD 15115">15115</a></li> <li><a href="/wiki/HIP_11915" title="HIP 11915">16008</a></li> <li><a href="/wiki/HD_224693" title="HD 224693">224693 (Axólotl)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:70px">Other</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/2MASS_J01225093%E2%88%922439505" title="2MASS J01225093−2439505">2MASS J01225093−2439505</a></li> <li><a href="/wiki/BD-07_436" title="BD-07 436">BD-07 436</a></li> <li><a href="/wiki/BD%E2%88%9217_63" title="BD−17 63">BD−17 63 (Felixvarela)</a></li> <li><a href="/wiki/Cayrel%27s_Star" title="Cayrel's Star">Cayrel's Star</a></li> <li><a href="/wiki/CFBDS_J005910.90%E2%80%93011401.3" title="CFBDS J005910.90–011401.3">CFBDS J005910.90–011401.3</a></li> <li><a href="/wiki/DENIS-P_J020529.0%E2%88%92115925" title="DENIS-P J020529.0−115925">DENIS-P J020529.0−115925</a></li> <li><a href="/wiki/GD_40" title="GD 40">GD 40</a></li> <li><a href="/wiki/Gliese_65" title="Gliese 65">Gliese 65</a></li> <li><a href="/wiki/Gliese_105" title="Gliese 105">Gliese 105</a></li> <li><a href="/wiki/GJ_1002" title="GJ 1002">GJ 1002</a></li> <li><a href="/wiki/GJ_1005" title="GJ 1005">GJ 1005</a></li> <li><a href="/wiki/HIP_5158" title="HIP 5158">HIP 5158</a></li> <li><a href="/wiki/HIP_11952" title="HIP 11952">HIP 11952</a></li> <li><a href="/wiki/LHS_1140" title="LHS 1140">LHS 1140</a></li> <li><a href="/wiki/NGC_156" title="NGC 156">NGC 156</a></li> <li><a href="/wiki/NGC_158" title="NGC 158">NGC 158</a></li> <li><a href="/wiki/NGC_302" title="NGC 302">NGC 302</a></li> <li><a href="/wiki/NGC_308" title="NGC 308">NGC 308</a></li> <li><a href="/wiki/NGC_310" title="NGC 310">NGC 310</a></li> <li><a href="/wiki/PSR_J0108%E2%88%921431" title="PSR J0108−1431">PSR J0108−1431</a></li> <li><a href="/wiki/SDSS_J001820.5%E2%88%92093939.2" title="SDSS J001820.5−093939.2">SDSS J001820.5−093939.2</a></li> <li><a href="/wiki/SDSS_J0106%E2%88%921000" title="SDSS J0106−1000">SDSS J0106−1000</a></li> <li><a href="/wiki/ULAS_J003402.77%E2%88%92005206.7" title="ULAS J003402.77−005206.7">ULAS J003402.77−005206.7</a></li> <li><a href="/wiki/WD_J2356%E2%88%92209" title="WD J2356−209">WD J2356−209</a></li> <li><a href="/wiki/WASP-20" title="WASP-20">WASP-20</a></li> <li><a href="/wiki/WASP-26" title="WASP-26">WASP-26</a></li> <li><a href="/wiki/WASP-44" title="WASP-44">WASP-44</a></li> <li><a href="/wiki/BD%2B00_316" title="BD+00 316">WASP-71 (Mpingo)</a></li> <li><a href="/wiki/WISE_J0254%2B0223" title="WISE J0254+0223">WISE J0254+0223</a></li> <li><a href="/wiki/WHL0137-LS" title="WHL0137-LS">WHL0137-LS</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Exoplanets" scope="row" class="navbox-group" style="width:151px;background: #ddddff;"><a href="/wiki/Exoplanet" title="Exoplanet">Exoplanets</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/79_Ceti_b" title="79 Ceti b">79 Ceti b</a></li> <li><a href="/wiki/81_Ceti_b" title="81 Ceti b">81 Ceti b</a></li> <li><a href="/wiki/94_Ceti_b" title="94 Ceti b">94 Ceti b</a></li> <li><a href="/wiki/BD%E2%88%9217_63_b" title="BD−17 63 b">BD−17 63 b</a></li> <li><a href="/wiki/HD_1461_b" title="HD 1461 b">HD 1461 b</a></li> <li><a href="/wiki/HD_2638_b" title="HD 2638 b">HD 2638 b</a></li> <li><a href="/wiki/HD_5319_b" title="HD 5319 b">HD 5319 b</a></li> <li><a href="/wiki/HD_11506_b" title="HD 11506 b">HD 11506 b</a></li> <li><a href="/wiki/HD_11506_c" title="HD 11506 c">c</a></li> <li><a href="/wiki/HD_11964_b" title="HD 11964 b">HD 11964 b</a></li> <li><a href="/wiki/HD_11964_c" title="HD 11964 c">c</a></li> <li><a href="/wiki/HD_224693_b" title="HD 224693 b">HD 224693 b</a></li> <li><a href="/wiki/HIP_5158_b" title="HIP 5158 b">HIP 5158 b</a></li> <li><a href="/wiki/HIP_5158_c" title="HIP 5158 c">c</a></li> <li><a href="/wiki/HIP_11915_b" title="HIP 11915 b">HIP 11915 b</a></li> <li><a href="/wiki/Tau_Ceti_e" title="Tau Ceti e">τ Ceti e</a></li> <li><a href="/wiki/Tau_Ceti_f" title="Tau Ceti f">f</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Nebulae" scope="row" class="navbox-group" style="width:151px;background: #ddddff;"><a href="/wiki/Nebula" title="Nebula">Nebulae</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/NGC_246" title="NGC 246">NGC 246</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:55px"><a href="/wiki/Galaxy" title="Galaxy">Galaxies</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:70px"><a href="/wiki/Messier_object" title="Messier object">Messier</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Messier_77" title="Messier 77">77</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:70px"><a href="/wiki/New_General_Catalogue" title="New General Catalogue">NGC</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/NGC_17" title="NGC 17">17</a></li> <li><a href="/wiki/NGC_35" title="NGC 35">35</a></li> <li><a href="/wiki/NGC_45" title="NGC 45">45</a></li> <li><a href="/wiki/NGC_47" title="NGC 47">47</a></li> <li><a href="/wiki/NGC_50" title="NGC 50">50</a></li> <li><a href="/wiki/NGC_54" title="NGC 54">54</a></li> <li><a href="/wiki/NGC_59" title="NGC 59">59</a></li> <li><a href="/wiki/NGC_61" title="NGC 61">61</a></li> <li><a href="/wiki/NGC_62" title="NGC 62">62</a></li> <li><a href="/wiki/NGC_64" title="NGC 64">64</a></li> <li><a href="/wiki/NGC_65" title="NGC 65">65</a></li> <li><a href="/wiki/NGC_66" title="NGC 66">66</a></li> <li><a href="/wiki/NGC_73" title="NGC 73">73</a></li> <li><a href="/wiki/NGC_77" title="NGC 77">77</a></li> <li><a href="/wiki/NGC_102" title="NGC 102">102</a></li> <li><a href="/wiki/NGC_107" title="NGC 107">107</a></li> <li><a href="/wiki/NGC_113" title="NGC 113">113</a></li> <li><a href="/wiki/NGC_114" title="NGC 114">114</a></li> <li><a href="/wiki/NGC_116" title="NGC 116">116</a></li> <li><a href="/wiki/NGC_117" title="NGC 117">117</a></li> <li><a href="/wiki/NGC_118" title="NGC 118">118</a></li> <li><a href="/wiki/NGC_120" title="NGC 120">120</a></li> <li><a href="/wiki/NGC_124" title="NGC 124">124</a></li> <li><a href="/wiki/NGC_132" title="NGC 132">132</a></li> <li><a href="/wiki/NGC_135" class="mw-redirect" title="NGC 135">135</a></li> <li><a href="/wiki/NGC_142" class="mw-redirect" title="NGC 142">142</a></li> <li><a href="/wiki/NGC_143" title="NGC 143">143</a></li> <li><a href="/wiki/NGC_144" title="NGC 144">144</a></li> <li><a href="/wiki/NGC_145" title="NGC 145">145</a></li> <li><a href="/wiki/NGC_151" title="NGC 151">151</a></li> <li><a href="/wiki/NGC_154" title="NGC 154">154</a></li> <li><a href="/wiki/NGC_155" title="NGC 155">155</a></li> <li><a href="/wiki/NGC_157" title="NGC 157">157</a></li> <li><a href="/wiki/NGC_161" title="NGC 161">161</a></li> <li><a href="/wiki/NGC_163" title="NGC 163">163</a></li> <li><a href="/wiki/NGC_165" title="NGC 165">165</a></li> <li><a href="/wiki/NGC_166" title="NGC 166">166</a></li> <li><a href="/wiki/NGC_167" title="NGC 167">167</a></li> <li><a href="/wiki/NGC_168" title="NGC 168">168</a></li> <li><a href="/wiki/NGC_170" title="NGC 170">170</a></li> <li><a href="/wiki/NGC_171" title="NGC 171">171</a></li> <li><a href="/wiki/NGC_172" title="NGC 172">172</a></li> <li><a href="/wiki/NGC_173" title="NGC 173">173</a></li> <li><a href="/wiki/NGC_177" title="NGC 177">177</a></li> <li><a href="/wiki/NGC_178" title="NGC 178">178</a></li> <li><a href="/wiki/NGC_179" title="NGC 179">179</a></li> <li><a href="/wiki/NGC_187" title="NGC 187">187</a></li> <li><a href="/wiki/NGC_191" title="NGC 191">191</a></li> <li><a href="/wiki/NGC_192" title="NGC 192">192</a></li> <li><a href="/wiki/NGC_195" title="NGC 195">195</a></li> <li><a href="/wiki/NGC_196" title="NGC 196">196</a></li> <li><a href="/wiki/NGC_197" title="NGC 197">197</a></li> <li><a href="/wiki/NGC_201" title="NGC 201">201</a></li> <li><a href="/wiki/NGC_207" title="NGC 207">207</a></li> <li><a href="/wiki/NGC_209" title="NGC 209">209</a></li> <li><a href="/wiki/NGC_210" title="NGC 210">210</a></li> <li><a href="/wiki/NGC_216" title="NGC 216">216</a></li> <li><a href="/wiki/NGC_217" title="NGC 217">217</a></li> <li><a href="/wiki/NGC_219" title="NGC 219">219</a></li> <li><a href="/wiki/NGC_223" title="NGC 223">223</a></li> <li><a href="/wiki/NGC_227" title="NGC 227">227</a></li> <li><a href="/wiki/NGC_230" title="NGC 230">230</a></li> <li><a href="/wiki/NGC_232" title="NGC 232">232</a></li> <li><a href="/wiki/NGC_235" title="NGC 235">235</a></li> <li><a href="/wiki/NGC_237" title="NGC 237">237</a></li> <li><a href="/wiki/NGC_239" title="NGC 239">239</a></li> <li><a href="/wiki/NGC_244" title="NGC 244">244</a></li> <li><a href="/wiki/NGC_245" title="NGC 245">245</a></li> <li><a href="/wiki/NGC_247" title="NGC 247">247</a></li> <li><a href="/wiki/NGC_255" title="NGC 255">255</a></li> <li><a href="/wiki/NGC_259" title="NGC 259">259</a></li> <li><a href="/wiki/NGC_263" title="NGC 263">263</a></li> <li><a href="/wiki/NGC_268" title="NGC 268">268</a></li> <li><a href="/wiki/NGC_270" title="NGC 270">270</a></li> <li><a href="/wiki/NGC_271" title="NGC 271">271</a></li> <li><a href="/wiki/NGC_273" title="NGC 273">273</a></li> <li><a href="/wiki/NGC_274" title="NGC 274">274</a></li> <li><a href="/wiki/NGC_275" title="NGC 275">275</a></li> <li><a href="/wiki/NGC_276" title="NGC 276">276</a></li> <li><a href="/wiki/NGC_277" title="NGC 277">277</a></li> <li><a href="/wiki/NGC_279" title="NGC 279">279</a></li> <li><a href="/wiki/NGC_283" title="NGC 283">283</a></li> <li><a href="/wiki/NGC_284" title="NGC 284">284</a></li> <li><a href="/wiki/NGC_285" title="NGC 285">285</a></li> <li><a href="/wiki/NGC_286" title="NGC 286">286</a></li> <li><a href="/wiki/NGC_291" title="NGC 291">291</a></li> <li><a href="/wiki/NGC_293" title="NGC 293">293</a></li> <li><a href="/wiki/NGC_297" title="NGC 297">297</a></li> <li><a href="/wiki/NGC_298" title="NGC 298">298</a></li> <li><a href="/wiki/NGC_301" title="NGC 301">301</a></li> <li><a href="/wiki/NGC_303" title="NGC 303">303</a></li> <li><a href="/wiki/NGC_307" title="NGC 307">307</a></li> <li><a href="/wiki/NGC_309" title="NGC 309">309</a></li> <li><a href="/wiki/NGC_320" title="NGC 320">320</a></li> <li><a href="/wiki/NGC_321" title="NGC 321">321</a></li> <li><a href="/wiki/NGC_325" title="NGC 325">325</a></li> <li><a href="/wiki/NGC_327" title="NGC 327">327</a></li> <li><a href="/wiki/NGC_329" title="NGC 329">329</a></li> <li><a href="/wiki/NGC_331" title="NGC 331">331</a></li> <li><a href="/wiki/NGC_333" title="NGC 333">333</a></li> <li><a href="/wiki/NGC_335" title="NGC 335">335</a></li> <li><a href="/wiki/NGC_336" title="NGC 336">336</a></li> <li><a href="/wiki/NGC_337" title="NGC 337">337</a></li> <li><a href="/wiki/NGC_340" title="NGC 340">340</a></li> <li><a href="/wiki/NGC_341" title="NGC 341">341</a></li> <li><a href="/wiki/NGC_342" title="NGC 342">342</a></li> <li><a href="/wiki/NGC_343" title="NGC 343">343</a></li> <li><a href="/wiki/NGC_344" title="NGC 344">344</a></li> <li><a href="/wiki/NGC_345" title="NGC 345">345</a></li> <li><a href="/wiki/NGC_347" title="NGC 347">347</a></li> <li><a href="/wiki/NGC_349" title="NGC 349">349</a></li> <li><a href="/wiki/NGC_350" title="NGC 350">350</a></li> <li><a href="/wiki/NGC_351" title="NGC 351">351</a></li> <li><a href="/wiki/NGC_352" title="NGC 352">352</a></li> <li><a href="/wiki/NGC_353" title="NGC 353">353</a></li> <li><a href="/wiki/NGC_355" title="NGC 355">355</a></li> <li><a href="/wiki/NGC_356" title="NGC 356">356</a></li> <li><a href="/wiki/NGC_357" title="NGC 357">357</a></li> <li><a href="/wiki/NGC_359" title="NGC 359">359</a></li> <li><a href="/wiki/NGC_363" title="NGC 363">363</a></li> <li><a href="/wiki/NGC_364" title="NGC 364">364</a></li> <li><a href="/wiki/NGC_367" title="NGC 367">367</a></li> <li><a href="/wiki/NGC_369" title="NGC 369">369</a></li> <li><a href="/wiki/NGC_377" title="NGC 377">377</a></li> <li><a href="/wiki/NGC_391" title="NGC 391">391</a></li> <li><a href="/wiki/NGC_413" title="NGC 413">413</a></li> <li><a href="/wiki/NGC_417" title="NGC 417">417</a></li> <li><a href="/wiki/NGC_426" title="NGC 426">426</a></li> <li><a href="/wiki/NGC_428" title="NGC 428">428</a></li> <li><a href="/wiki/NGC_429" title="NGC 429">429</a></li> <li><a href="/wiki/NGC_430" title="NGC 430">430</a></li> <li><a href="/wiki/NGC_435" title="NGC 435">435</a></li> <li><a href="/wiki/NGC_442" title="NGC 442">442</a></li> <li><a href="/wiki/NGC_445" title="NGC 445">445</a></li> <li><a href="/wiki/NGC_448" title="NGC 448">448</a></li> <li><a href="/wiki/NGC_450" title="NGC 450">450</a></li> <li><a href="/wiki/NGC_478" title="NGC 478">478</a></li> <li><a href="/wiki/NGC_480" title="NGC 480">480</a></li> <li><a href="/wiki/NGC_481" title="NGC 481">481</a></li> <li><a href="/wiki/NGC_487" title="NGC 487">487</a></li> <li><a href="/wiki/NGC_493" title="NGC 493">493</a></li> <li><a href="/wiki/NGC_497" title="NGC 497">497</a></li> <li><a href="/wiki/NGC_519" title="NGC 519">519</a></li> <li><a href="/wiki/NGC_521" title="NGC 521">521</a></li> <li><a href="/wiki/NGC_533" title="NGC 533">533</a></li> <li><a href="/wiki/NGC_540" title="NGC 540">540</a></li> <li><a href="/wiki/NGC_541" title="NGC 541">541</a></li> <li><a href="/wiki/NGC_545" title="NGC 545">545</a></li> <li><a href="/wiki/NGC_547" title="NGC 547">547</a></li> <li><a href="/w/index.php?title=NGC_554&action=edit&redlink=1" class="new" title="NGC 554 (page does not exist)">554</a></li> <li><a href="/wiki/NGC_555" title="NGC 555">555</a></li> <li><a href="/wiki/NGC_560" title="NGC 560">560</a></li> <li><a href="/wiki/NGC_570" title="NGC 570">570</a></li> <li><a href="/wiki/NGC_584" title="NGC 584">584</a></li> <li><a href="/wiki/NGC_585" title="NGC 585">585</a></li> <li><a href="/wiki/NGC_596" title="NGC 596">596</a></li> <li><a href="/wiki/NGC_615" title="NGC 615">615</a></li> <li><a href="/wiki/NGC_622" title="NGC 622">622</a></li> <li><a href="/wiki/NGC_655" title="NGC 655">655</a></li> <li><a href="/wiki/NGC_681" title="NGC 681">681</a></li> <li><a href="/wiki/NGC_682" title="NGC 682">682</a></li> <li><a href="/wiki/NGC_690" title="NGC 690">690</a></li> <li><a href="/wiki/NGC_701" title="NGC 701">701</a></li> <li><a href="/wiki/NGC_720" title="NGC 720">720</a></li> <li><a href="/wiki/NGC_747" title="NGC 747">747</a></li> <li><a href="/wiki/NGC_755" title="NGC 755">755</a></li> <li><a href="/wiki/NGC_779" title="NGC 779">779</a></li> <li><a href="/wiki/NGC_800" title="NGC 800">800</a></li> <li><a href="/wiki/NGC_806" title="NGC 806">806</a></li> <li><a href="/wiki/NGC_833" title="NGC 833">833</a></li> <li><a href="/wiki/NGC_838" title="NGC 838">838</a></li> <li><a href="/wiki/NGC_864" title="NGC 864">864</a></li> <li><a href="/wiki/NGC_874" title="NGC 874">874</a></li> <li><a href="/wiki/NGC_880" title="NGC 880">880</a></li> <li><a href="/wiki/NGC_895" title="NGC 895">895</a></li> <li><a href="/wiki/NGC_908" title="NGC 908">908</a></li> <li><a href="/wiki/NGC_936" title="NGC 936">936</a></li> <li><a href="/wiki/NGC_945" title="NGC 945">945</a></li> <li><a href="/wiki/NGC_950" title="NGC 950">950</a></li> <li><a href="/wiki/NGC_960" title="NGC 960">960</a></li> <li><a href="/wiki/NGC_965" title="NGC 965">965</a></li> <li><a href="/wiki/NGC_966" title="NGC 966">966</a></li> <li><a href="/wiki/NGC_985" title="NGC 985">985</a></li> <li><a href="/wiki/NGC_988" title="NGC 988">988</a></li> <li><a href="/wiki/NGC_1009" title="NGC 1009">1009</a></li> <li><a href="/wiki/NGC_1015" title="NGC 1015">1015</a></li> <li><a href="/wiki/NGC_1019" title="NGC 1019">1019</a></li> <li><a href="/wiki/NGC_1022" title="NGC 1022">1022</a></li> <li><a href="/wiki/NGC_1032" title="NGC 1032">1032</a></li> <li><a href="/wiki/NGC_1042" title="NGC 1042">1042</a></li> <li><a href="/wiki/NGC_1052" title="NGC 1052">1052</a></li> <li><a href="/wiki/NGC_1055" title="NGC 1055">1055</a></li> <li><a href="/wiki/NGC_1073" title="NGC 1073">1073</a></li> <li><a href="/wiki/NGC_1087" title="NGC 1087">1087</a></li> <li><a href="/wiki/NGC_1090" title="NGC 1090">1090</a></li> <li><a href="/wiki/NGC_1128" title="NGC 1128">1128</a></li> <li><a href="/wiki/NGC_1142" title="NGC 1142">1142</a></li> <li><a href="/wiki/NGC_1218" title="NGC 1218">1218</a></li> <li><a href="/wiki/NGC_7808" title="NGC 7808">7808</a></li> <li><a href="/wiki/NGC_7828" title="NGC 7828">7828</a></li> <li><a href="/wiki/NGC_7829" title="NGC 7829">7829</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:70px">Other</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Arp_146" title="Arp 146">Arp 146</a></li> <li><a href="/wiki/Arp_147" title="Arp 147">Arp 147</a></li> <li><a href="/wiki/Arp_256" title="Arp 256">Arp 256</a></li> <li><a href="/wiki/3C_75" title="3C 75">3C 75</a></li> <li><a href="/wiki/Cetus_Dwarf" title="Cetus Dwarf">Cetus Dwarf</a></li> <li><a href="/wiki/HCM-6A" title="HCM-6A">HCM-6A</a></li> <li><a href="/wiki/HD1" title="HD1">HD2</a></li> <li><a href="/wiki/Holmberg_15A" title="Holmberg 15A">Holmberg 15A</a></li> <li><a href="/wiki/HXMM01" title="HXMM01">HXMM01</a></li> <li><a href="/wiki/IC_1613" title="IC 1613">IC 1613</a></li> <li><a href="/wiki/IC_1623" title="IC 1623">IC 1623</a></li> <li><a href="/wiki/IRAS_01003-2238" title="IRAS 01003-2238">IRAS 01003-2238</a></li> <li><a href="/wiki/Markarian_1014" title="Markarian 1014">Markarian 1014</a></li> <li><a class="mw-selflink selflink">Markarian 1018</a></li> <li><a href="/wiki/MCG_-03-04-014" title="MCG -03-04-014">MCG -03-04-014</a></li> <li><a href="/wiki/PGC_2456" title="PGC 2456">PGC 2456</a></li> <li><a href="/wiki/SDSS_J0303-0019" title="SDSS J0303-0019">SDSS J0303-0019</a></li> <li><a href="/wiki/SXDF-NB1006-2" title="SXDF-NB1006-2">SXDF-NB1006-2</a></li> <li><a href="/wiki/9Spitch" class="mw-redirect" title="9Spitch">9Spitch</a></li> <li><a href="/wiki/TON_S180" title="TON S180">TON S180</a></li> <li><a href="/wiki/UGC_711" title="UGC 711">UGC 711</a></li> <li><a href="/wiki/UGC_1775" title="UGC 1775">UGC 1775</a></li> <li><a href="/wiki/Wolf%E2%80%93Lundmark%E2%80%93Melotte" title="Wolf–Lundmark–Melotte">Wolf–Lundmark–Melotte</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Galaxy_clusters" scope="row" class="navbox-group" style="width:151px;background: #ddddff;"><a href="/wiki/Galaxy_cluster" title="Galaxy cluster">Galaxy clusters</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Abell_133" title="Abell 133">Abell 133</a></li> <li><a href="/wiki/Abell_222" title="Abell 222">Abell 222</a></li> <li><a href="/wiki/Abell_223" title="Abell 223">Abell 223</a></li> <li><a href="/wiki/Abell_370" title="Abell 370">Abell 370</a></li> <li><a href="/wiki/Abell_400" title="Abell 400">Abell 400</a></li> <li><a href="/wiki/Arp_251" title="Arp 251">Arp 251</a></li> <li><a href="/wiki/Gioiello_(galaxy_cluster)" title="Gioiello (galaxy cluster)">Gioiello</a></li> <li><a href="/wiki/IRC_0218" title="IRC 0218">IRC 0218</a></li> <li><a href="/wiki/JKCS_041" title="JKCS 041">JKCS 041</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Astronomical_events" scope="row" class="navbox-group" style="width:151px;background: #ddddff;"><a href="/wiki/Transient_astronomical_event" class="mw-redirect" title="Transient astronomical event">Astronomical events</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/SN_2005E" title="SN 2005E">SN 2005E</a></li> <li><a href="/wiki/SN_2005gj" title="SN 2005gj">SN 2005gj</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td class="navbox-abovebelow" colspan="2" style="text-align: center;"><div><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" 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