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<div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">US Air Force satellite</div> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><style data-mw-deduplicate="TemplateStyles:r1089065853">.mw-parser-output .ib-spaceflight{width:25em}.mw-parser-output .ib-spaceflight .infobox-header{background:#ddf}.mw-parser-output .ib-edit-wd{float:right}</style><table class="infobox ib-spaceflight"><caption class="infobox-title">OV2-5</caption><tbody><tr><td colspan="2" class="infobox-image"><span typeof="mw:File"><a href="/wiki/File:OV2-5.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1a/OV2-5.jpg/180px-OV2-5.jpg" decoding="async" width="180" height="131" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1a/OV2-5.jpg/270px-OV2-5.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1a/OV2-5.jpg/360px-OV2-5.jpg 2x" data-file-width="580" data-file-height="423" /></a></span><div class="infobox-caption">OV2-5 satellite mock-up donated by Northrop to the National Museum of the U.S. Air Force</div></td></tr><tr><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546" /></td></tr><tr><th scope="row" class="infobox-label">Mission type</th><td class="infobox-data"><a href="/wiki/Particle_science" class="mw-redirect" title="Particle science">particle science</a></td></tr><tr><th scope="row" class="infobox-label">Operator</th><td class="infobox-data"><a href="/wiki/USAF" class="mw-redirect" title="USAF">USAF</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/International_Designator" title="International Designator">COSPAR ID</a></th><td class="infobox-data"><span class="nowrap"><a rel="nofollow" class="external text" href="https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1968-081A">1968-081A</a></span><span class="ib-edit-wd"> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q107335351#P247" title="Edit this at Wikidata"><img alt="Edit this at Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></span></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Satellite_Catalog_Number" title="Satellite Catalog Number">SATCAT <abbr title="number">no.</abbr></a></th><td class="infobox-data">S03428</td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546" /></td></tr><tr><th colspan="2" class="infobox-header">Spacecraft properties</th></tr><tr><th scope="row" class="infobox-label">Manufacturer</th><td class="infobox-data"><a href="/wiki/Northrop_Corporation" title="Northrop Corporation">Northrop</a></td></tr><tr><th scope="row" class="infobox-label">Launch mass</th><td class="infobox-data">204 kg (450 lb)<sup id="cite_ref-NSSDC_1-0" class="reference"><a href="#cite_note-NSSDC-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546" /></td></tr><tr><th colspan="2" class="infobox-header">Start of mission</th></tr><tr><th scope="row" class="infobox-label">Launch date</th><td class="infobox-data">26 September 1968, 07:37:01<span style="display:none"> (<span class="dtstart">1968-09-26UTC07:37:01</span>)</span> UTC</td></tr><tr><th scope="row" class="infobox-label">Rocket</th><td class="infobox-data"><a href="/wiki/Titan_IIIC" title="Titan IIIC">Titan IIIC</a></td></tr><tr><th scope="row" class="infobox-label">Launch site</th><td class="infobox-data"><a href="/wiki/Cape_Canaveral_Air_Force_Station_Space_Launch_Complex_41" class="mw-redirect" title="Cape Canaveral Air Force Station Space Launch Complex 41">Cape Canaveral LC41</a><sup id="cite_ref-log_2-0" class="reference"><a href="#cite_note-log-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546" /></td></tr><tr><th colspan="2" class="infobox-header">Orbital parameters</th></tr><tr><th scope="row" class="infobox-label">Reference system</th><td class="infobox-data"><a href="/wiki/Geocentric_orbit" title="Geocentric orbit">Geocentric</a></td></tr><tr><th scope="row" class="infobox-label">Regime</th><td class="infobox-data"><a href="/wiki/Highly_elliptical_orbit" title="Highly elliptical orbit">Geosynchronous</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Apsis" title="Apsis">Perigee altitude</a></th><td class="infobox-data">35,064 km (21,788 mi)<sup id="cite_ref-cat_3-0" class="reference"><a href="#cite_note-cat-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Apsis" title="Apsis">Apogee altitude</a></th><td class="infobox-data">35,797 km (22,243 mi)<sup id="cite_ref-cat_3-1" class="reference"><a href="#cite_note-cat-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Orbital_inclination" title="Orbital inclination">Inclination</a></th><td class="infobox-data">3.0 °<sup id="cite_ref-n2yo_4-0" class="reference"><a href="#cite_note-n2yo-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Orbital_period" title="Orbital period">Period</a></th><td class="infobox-data">1,417.9 minutes<sup id="cite_ref-n2yo_4-1" class="reference"><a href="#cite_note-n2yo-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Epoch_(astronomy)" title="Epoch (astronomy)">Epoch</a></th><td class="infobox-data">26 November 1968</td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><td colspan="2" class="infobox-below"><div class="" style="width:100%; text-align:center; border-top:1px #aaa solid"><i><a href="/wiki/Orbiting_Vehicle#OV2" title="Orbiting Vehicle">OV-2</a></i></div><div style="width:100%"><div style="float: left; text-align:left;padding-right:0.5em;" class="noprint">← <a href="/wiki/OV2-3" title="OV2-3">OV2-3</a></div></div><div style="clear:both;" class=""></div></td></tr></tbody></table> <p><b>Orbiting Vehicle 2-5</b> (COSPAR ID: 1968-081A, also known as <b>OV2-5</b>), the third and last satellite of the second series of the United States Air Force's <a href="/wiki/Orbiting_Vehicle" title="Orbiting Vehicle">Orbiting Vehicle</a> program, was an American <a href="/wiki/Particle_science" class="mw-redirect" title="Particle science">particle science</a> and <a href="/wiki/Ionosphere" title="Ionosphere">ionosphere</a> research satellite. Launched 26 September 1968 along with three other satellites, OV2-5 became the first scientific satellite to operate at <a href="/wiki/Geosynchronous" class="mw-redirect" title="Geosynchronous">geosynchronous</a> altitude. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Background">Background</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OV2-5&action=edit&section=1" title="Edit section: Background"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Orbiting Vehicle satellite program arose from a US Air Force initiative, begun in the early 1960s, to reduce the expense of space research. Through this initiative, satellites would be standardized to improve reliability and cost-efficiency, and where possible, they would fly on test vehicles or be piggybacked with other satellites. In 1961, the Air Force Office of Aerospace Research (OAR) created the Aerospace Research Support Program (ARSP) to request satellite research proposals and choose mission experiments. The USAF Space and Missiles Organization created their own analog of the ARSP called the Space Experiments Support Program (SESP), which sponsored a greater proportion of technological experiments than the ARSP.<sup id="cite_ref-Brit_5-0" class="reference"><a href="#cite_note-Brit-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page / location: 417">: 417 </span></sup> Five distinct OV series of standardized satellites were developed under the auspices of these agencies.<sup id="cite_ref-Brit_5-1" class="reference"><a href="#cite_note-Brit-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page / location: 425">: 425 </span></sup> </p><p>The OV2 series of satellites was originally designed as part of the ARENTS (Advanced Research Environmental Test Satellite) program, intended to obtain supporting data for the <a href="/wiki/Vela_(satellite)" title="Vela (satellite)">Vela</a> satellites, which monitored the Earth for violations of the 1963 <a href="/wiki/Partial_Test_Ban_Treaty" class="mw-redirect" title="Partial Test Ban Treaty">Partial Test Ban Treaty</a>. Upon the cancellation of ARENTS due to delays in the <a href="/wiki/Centaur_(rocket_stage)" title="Centaur (rocket stage)">Centaur rocket stage</a>, the program's hardware (developed by <a href="/wiki/General_Dynamics" title="General Dynamics">General Dynamics</a>) was repurposed to fly on the <a href="/wiki/Titan_III" class="mw-redirect" title="Titan III">Titan III</a><sup id="cite_ref-Brit_5-2" class="reference"><a href="#cite_note-Brit-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page / location: 422">: 422 </span></sup> (initially the A,<sup id="cite_ref-avweek1965a_6-0" class="reference"><a href="#cite_note-avweek1965a-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> ultimately the C) booster test launches.<sup id="cite_ref-Brit_5-3" class="reference"><a href="#cite_note-Brit-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page / location: 422">: 422 </span></sup> The USAF contracted <a href="/wiki/Northrop_Corporation" title="Northrop Corporation">Northrop</a> to produce these satellites, with William C. Armstrong of Northrop Space Laboratories serving as the program manager.<sup id="cite_ref-avweek1965a_6-1" class="reference"><a href="#cite_note-avweek1965a-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p><p>The first satellite in the OV2 series, <a href="/wiki/OV2-1" title="OV2-1">OV2-1</a>, was launched 15 October 1965 with a suite of radiation measuring experiments; it was lost when its booster broke up in orbit.<sup id="cite_ref-NSSDC1_7-0" class="reference"><a href="#cite_note-NSSDC1-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> The next satellite in the series, OV2-2, was to carry out optical measurements from an altitude of 400 kilometres (250 mi), but the mission was cancelled when the Titan III test schedule was truncated. Instead, OV2-3, with several solar experiments, was scheduled for the next Titan III launch.<sup id="cite_ref-Brit_5-4" class="reference"><a href="#cite_note-Brit-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page / location: 422">: 422 </span></sup> </p><p>OV2-3, along with <a href="/wiki/LES-3" title="LES-3">LES-3</a>, <a href="/wiki/LES-4" title="LES-4">LES-4</a>, and <a href="/wiki/OSCAR_4" title="OSCAR 4">OSCAR 4</a>, was launched on a Titan IIIC on 22 December 1965, but the Transtage carrying the satellites never made its final burn to finalize the geosynchronous orbit. Though the other satellites attached separated and returned data, OV2-3 remained attached and did not operate.<sup id="cite_ref-Brit_5-5" class="reference"><a href="#cite_note-Brit-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> OV2-4, which would have left Earth's orbit to conduct measurements, was deleted from the schedule like OV2-2.<sup id="cite_ref-Brit_5-6" class="reference"><a href="#cite_note-Brit-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page / location: 422">: 422 </span></sup> </p><p>OV2-5, originally planned for launch in Spring of 1967, had the largest equipment loadout of the OV2 series. In addition to duplicating OV2-1's radiation detection capabilities, it also could conduct <a href="/wiki/Ionosphere" title="Ionosphere">ionospheric</a> radio transmission tests and measure the <a href="/wiki/Lyman_series" title="Lyman series">Lyman-alpha hydrogen emission background</a>. The Titan IIIC <a href="/wiki/Initial_Defense_Communications_Satellite_Program" title="Initial Defense Communications Satellite Program">launch failure on 26 August 1966</a> caused the rescheduling of OV2-5's flight for 1968.<sup id="cite_ref-Brit_5-7" class="reference"><a href="#cite_note-Brit-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page / location: 422">: 422 </span></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Spacecraft_design">Spacecraft design</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OV2-5&action=edit&section=2" title="Edit section: Spacecraft design"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The 204 kg (450 lb)<sup id="cite_ref-NSSDC_1-1" class="reference"><a href="#cite_note-NSSDC-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> OV2-5 was built to the configuration standard to all of the OV2 satellites, with a roughly cubical structure of aluminum honeycomb, .61 m (2.0 ft) in height, and .58 m (1.9 ft) wide. Four 2.3 m (7.5 ft) paddle-like solar panels, each with 20,160 solar cells, were mounted at the four upper corners of the main body. The power system, which included <a href="/wiki/Nickel%E2%80%93cadmium_battery" title="Nickel–cadmium battery">NiCd batteries</a> for night-time operations, provided 63 W of power. </p><p>As with the other craft in the OV2 series, experiments were generally mounted outside the cube while satellite systems, including tape recorder, command receiver, and PAM/FM/FM telemetry system, were installed inside. Four small solid rocket motors spun, one on each paddle, were designed to spin the OV2 satellites upon reaching orbit, providing gyroscopic stability. Cold-gas jets maintained this stability, receiving information on the satellite's alignment with respect to the Sun via an onboard solar aspect sensor, and with respect to the local magnetic field via two onboard fluxgate magnetometers. A damper kept the satellite from precessing (wobbling around its spin axis). Passive thermal control kept the satellite from overheating.<sup id="cite_ref-Brit_5-8" class="reference"><a href="#cite_note-Brit-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page / location: 422">: 422 </span></sup> OV2-5 was designed for a lifespan of at least one year.<sup id="cite_ref-northrop_8-0" class="reference"><a href="#cite_note-northrop-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Experiments">Experiments</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OV2-5&action=edit&section=3" title="Edit section: Experiments"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>OV2-5 carried 11 experiments, most of which were designed to measure charged particles and magnetic fields around the spacecraft. The satellite also carried the ORBIS-High Ionospheric radio beacon, a <a href="/wiki/Very_low_frequency" title="Very low frequency">VLF</a> receiver, as well as a scanning ultra-violet <a href="/wiki/Photometer" title="Photometer">photometer</a> to measure the <a href="/wiki/Lyman_series" title="Lyman series">Lyman-alpha hydrogen emission background</a>.<sup id="cite_ref-Brit_5-9" class="reference"><a href="#cite_note-Brit-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page / location: 422">: 422 </span></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Mission_and_results">Mission and results</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OV2-5&action=edit&section=4" title="Edit section: Mission and results"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>OV2-5, along with <a href="/w/index.php?title=OV5-2&action=edit&redlink=1" class="new" title="OV5-2 (page does not exist)">OV5-2</a>, <a href="/w/index.php?title=OV5-4&action=edit&redlink=1" class="new" title="OV5-4 (page does not exist)">OV5-4</a>, and <a href="/w/index.php?title=LES_6&action=edit&redlink=1" class="new" title="LES 6 (page does not exist)">LES 6</a>, was successfully launched via Titan IIIC from <a href="/wiki/Cape_Canaveral_Air_Force_Station_Space_Launch_Complex_41" class="mw-redirect" title="Cape Canaveral Air Force Station Space Launch Complex 41">Cape Canaveral LC41</a> at 07:37:01 UTC<sup id="cite_ref-log_2-1" class="reference"><a href="#cite_note-log-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> and ultimately delivered to an altitude of 22,000 mi (35,000 km)<sup id="cite_ref-northrop_8-1" class="reference"><a href="#cite_note-northrop-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> making it the first ever scientific <a href="/wiki/Geosynchronous" class="mw-redirect" title="Geosynchronous">geosynchronous</a> satellite. Though seven of the 12 experiment appendages failed to deploy, most of the satellite's experiments returned useful data.<sup id="cite_ref-Brit_5-10" class="reference"><a href="#cite_note-Brit-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page / location: 422">: 422 </span></sup> </p><p>Proton energy data collected 2–13 October 1968 in the energy range of 0.060 to 3.3 <a href="/wiki/Electron-volt" class="mw-redirect" title="Electron-volt">Mev</a> showed an eight-fold reduction in particle <a href="/wiki/Flux" title="Flux">flux</a> between solar storms and quiet periods. Measuring the angle at which protons encountered the satellite also helped refine theoretical models of how the <a href="/wiki/Magnetosphere" title="Magnetosphere">magnetosphere</a> interacts with the flux of charged particles.<sup id="cite_ref-jgr_9-0" class="reference"><a href="#cite_note-jgr-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p><p>OV2-5 was originally released into a <a href="/wiki/Geostationary" class="mw-redirect" title="Geostationary">geostationary</a> orbit,<sup id="cite_ref-northrop_8-2" class="reference"><a href="#cite_note-northrop-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> but as it lacked a system for maintaining an orbit, it gradually slipped into a geosynchronous orbit,<sup id="cite_ref-Brit_5-11" class="reference"><a href="#cite_note-Brit-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page / location: 422">: 422 </span></sup> where it and its Transtage still remain (as of June 2021).<sup id="cite_ref-n2yo_4-2" class="reference"><a href="#cite_note-n2yo-4"><span class="cite-bracket">[</span>4<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=OV2-5&action=edit&section=5" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-NSSDC-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-NSSDC_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-NSSDC_1-1"><sup><i><b>b</b></i></sup></a></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://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1968-081A">"OV2-5"</a>. NASA Space Science Data Coordinated Archive<span class="reference-accessdate">. Retrieved <span class="nowrap">8 June</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=OV2-5&rft.pub=NASA+Space+Science+Data+Coordinated+Archive&rft_id=https%3A%2F%2Fnssdc.gsfc.nasa.gov%2Fnmc%2Fspacecraft%2Fdisplay.action%3Fid%3D1968-081A&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOV2-5" class="Z3988"></span></span> </li> <li id="cite_note-log-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-log_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-log_2-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFMcDowell" class="citation web cs1">McDowell, Jonathan. <a rel="nofollow" class="external text" href="http://planet4589.org/space/log/launchlog.txt">"Launch Log"</a>. Jonathan's Space Report<span class="reference-accessdate">. Retrieved <span class="nowrap">8 June</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Launch+Log&rft.pub=Jonathan%27s+Space+Report&rft.aulast=McDowell&rft.aufirst=Jonathan&rft_id=http%3A%2F%2Fplanet4589.org%2Fspace%2Flog%2Flaunchlog.txt&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOV2-5" class="Z3988"></span></span> </li> <li id="cite_note-cat-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-cat_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-cat_3-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFMcDowell" class="citation web cs1">McDowell, Jonathan. <a rel="nofollow" class="external text" href="https://www.planet4589.org/space/log/satcat.txt">"Satellite Catalog"</a>. Jonathon's Space Report<span class="reference-accessdate">. Retrieved <span class="nowrap">8 June</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Satellite+Catalog&rft.pub=Jonathon%27s+Space+Report&rft.aulast=McDowell&rft.aufirst=Jonathan&rft_id=https%3A%2F%2Fwww.planet4589.org%2Fspace%2Flog%2Fsatcat.txt&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOV2-5" class="Z3988"></span></span> </li> <li id="cite_note-n2yo-4"><span class="mw-cite-backlink">^ <a href="#cite_ref-n2yo_4-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-n2yo_4-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-n2yo_4-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.n2yo.com/satellite/?s=3428#results">"OV2-5"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">8 June</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=OV2-5&rft_id=https%3A%2F%2Fwww.n2yo.com%2Fsatellite%2F%3Fs%3D3428%23results&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOV2-5" class="Z3988"></span></span> </li> <li id="cite_note-Brit-5"><span class="mw-cite-backlink">^ <a href="#cite_ref-Brit_5-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Brit_5-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Brit_5-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-Brit_5-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-Brit_5-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-Brit_5-5"><sup><i><b>f</b></i></sup></a> <a href="#cite_ref-Brit_5-6"><sup><i><b>g</b></i></sup></a> <a href="#cite_ref-Brit_5-7"><sup><i><b>h</b></i></sup></a> <a href="#cite_ref-Brit_5-8"><sup><i><b>i</b></i></sup></a> <a href="#cite_ref-Brit_5-9"><sup><i><b>j</b></i></sup></a> <a href="#cite_ref-Brit_5-10"><sup><i><b>k</b></i></sup></a> <a href="#cite_ref-Brit_5-11"><sup><i><b>l</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFPowellRichards1987" class="citation magazine cs1">Powell, Joel W.; Richards, G.R. 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London: British Interplanetary Society.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Journal+of+the+British+Interplanetary+Society&rft.atitle=The+Orbiting+Vehicle+Series+of+Satellites&rft.volume=40&rft.date=1987&rft.aulast=Powell&rft.aufirst=Joel+W.&rft.au=Richards%2C+G.R.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOV2-5" class="Z3988"></span></span> </li> <li id="cite_note-avweek1965a-6"><span class="mw-cite-backlink">^ <a href="#cite_ref-avweek1965a_6-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-avweek1965a_6-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation magazine cs1"><span class="id-lock-subscription" title="Paid subscription required"><a rel="nofollow" class="external text" href="http://archive.aviationweek.com/issue/19650208#!&pid=26">"OV2-1A Readied for Titan 3 A Test"</a></span>. <i>Aviation Week and Space Technology</i>. New York: McGraw Hill Publishing Company. February 8, 1965<span class="reference-accessdate">. Retrieved <span class="nowrap">February 10,</span> 2020</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Aviation+Week+and+Space+Technology&rft.atitle=OV2-1A+Readied+for+Titan+3+A+Test&rft.date=1965-02-08&rft_id=http%3A%2F%2Farchive.aviationweek.com%2Fissue%2F19650208%23%21%26pid%3D26&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOV2-5" class="Z3988"></span></span> </li> <li id="cite_note-NSSDC1-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-NSSDC1_7-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1965-082A">"OV2-1"</a>. NASA Space Science Data Coordinated Archive<span class="reference-accessdate">. Retrieved <span class="nowrap">February 10,</span> 2020</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=OV2-1&rft.pub=NASA+Space+Science+Data+Coordinated+Archive&rft_id=https%3A%2F%2Fnssdc.gsfc.nasa.gov%2Fnmc%2Fspacecraft%2Fdisplay.action%3Fid%3D1965-082A&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOV2-5" class="Z3988"></span></span> </li> <li id="cite_note-northrop-8"><span class="mw-cite-backlink">^ <a href="#cite_ref-northrop_8-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-northrop_8-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-northrop_8-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.nationalmuseum.af.mil/Visit/Museum-Exhibits/Fact-Sheets/Display/Article/196869/northrop-ov2-5-space-satellite/">"Northrop OV2-5 Space Satellite"</a>. National Museum of the United States Air Force. 4 June 2015<span class="reference-accessdate">. Retrieved <span class="nowrap">8 June</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Northrop+OV2-5+Space+Satellite&rft.pub=National+Museum+of+the+United+States+Air+Force&rft.date=2015-06-04&rft_id=https%3A%2F%2Fwww.nationalmuseum.af.mil%2FVisit%2FMuseum-Exhibits%2FFact-Sheets%2FDisplay%2FArticle%2F196869%2Fnorthrop-ov2-5-space-satellite%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOV2-5" class="Z3988"></span></span> </li> <li id="cite_note-jgr-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-jgr_9-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFStevens,_John_R.;_Martina,_E._Frank;_White,_R._Stephen1970" class="citation journal cs1">Stevens, John R.; Martina, E. Frank; White, R. Stephen (1 October 1970). <a rel="nofollow" class="external text" href="https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/JA075i028p05373">"Proton energy distributions from 0.060 to 3.3 Mev at 6.6 Earth radii"</a>. <i>Journal of Geophysical Research</i>. <b>75</b> (28): 5373. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1029%2FJA075i028p05373">10.1029/JA075i028p05373</a><span class="reference-accessdate">. Retrieved <span class="nowrap">8 June</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research&rft.atitle=Proton+energy+distributions+from+0.060+to+3.3+Mev+at+6.6+Earth+radii&rft.volume=75&rft.issue=28&rft.pages=5373&rft.date=1970-10-01&rft_id=info%3Adoi%2F10.1029%2FJA075i028p05373&rft.au=Stevens%2C+John+R.%3B+Martina%2C+E.+Frank%3B+White%2C+R.+Stephen&rft_id=https%3A%2F%2Fagupubs.onlinelibrary.wiley.com%2Fdoi%2Fabs%2F10.1029%2FJA075i028p05373&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOV2-5" class="Z3988"></span><span class="cs1-maint citation-comment"><code class="cs1-code">{{<a href="/wiki/Template:Cite_journal" title="Template:Cite journal">cite journal</a>}}</code>: CS1 maint: multiple names: authors list (<a href="/wiki/Category:CS1_maint:_multiple_names:_authors_list" title="Category:CS1 maint: multiple names: authors list">link</a>)</span></span> </li> </ol></div></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=OV2-5&action=edit&section=6" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://www.n2yo.com/satellite/?s=3428#results">Current orbital information for OV2-5</a>. N2YO.com</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 .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist dd::after,.mw-parser-output .hlist li::after{content:" · ";font-weight:bold}.mw-parser-output .hlist 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href="/wiki/1967_in_spaceflight" title="1967 in spaceflight">← 1967</a></div><a href="/wiki/1968_in_spaceflight" title="1968 in spaceflight"><span class="vevent"><span class="summary">Orbital launches in <span class="dtstart">1968</span></span></span></a><div style="float: right;"><a href="/wiki/1969_in_spaceflight" title="1969 in spaceflight">1969 →</a></div></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Surveyor_7" title="Surveyor 7">Surveyor 7</a></li> <li><a href="/wiki/Explorer_36" title="Explorer 36">Explorer 36</a></li> <li><a href="/w/index.php?title=Kosmos_199&action=edit&redlink=1" class="new" title="Kosmos 199 (page does not exist)">Kosmos 199</a></li> <li><a href="/w/index.php?title=OPS_1965&action=edit&redlink=1" class="new" title="OPS 1965 (page does not exist)">OPS 1965</a></li> <li><a href="/w/index.php?title=OPS_5028&action=edit&redlink=1" class="new" title="OPS 5028 (page does not exist)">OPS 5028</a></li> <li><a href="/w/index.php?title=Kosmos_200&action=edit&redlink=1" class="new" title="Kosmos 200 (page does not exist)">Kosmos 200</a></li> <li><a href="/wiki/Apollo_5" title="Apollo 5">Apollo 5</a></li> <li><a href="/w/index.php?title=OPS_2243&action=edit&redlink=1" class="new" title="OPS 2243 (page does not exist)">OPS 2243</a></li> <li><a href="/w/index.php?title=OPS_6236&action=edit&redlink=1" class="new" title="OPS 6236 (page does not exist)">OPS 6236</a></li> <li><a href="/w/index.php?title=Kosmos_201&action=edit&redlink=1" class="new" title="Kosmos 201 (page does not exist)">Kosmos 201</a></li> <li><i><a href="/wiki/Luna_E-6LS_No.112" title="Luna E-6LS No.112">E-6LS No.112</a></i></li> <li><a href="/wiki/Kosmos_202" title="Kosmos 202">Kosmos 202</a></li> <li><a href="/w/index.php?title=Kosmos_203&action=edit&redlink=1" class="new" title="Kosmos 203 (page does not exist)">Kosmos 203</a></li> <li><a href="/w/index.php?title=OPS_7034&action=edit&redlink=1" class="new" title="OPS 7034 (page does not exist)">OPS 7034</a></li> <li><a href="/wiki/Zond_4" title="Zond 4">Zond 4</a></li> <li><a href="/w/index.php?title=OGO-5&action=edit&redlink=1" class="new" title="OGO-5 (page does not exist)">OGO-5</a></li> <li><a href="/wiki/Kosmos_204" title="Kosmos 204">Kosmos 204</a></li> <li><a href="/wiki/Kosmos_205" title="Kosmos 205">Kosmos 205</a></li> <li><a href="/wiki/Explorer_37" class="mw-redirect" title="Explorer 37">Explorer 37</a></li> <li><i><a href="/w/index.php?title=DS-U1-Ya_No.1&action=edit&redlink=1" class="new" title="DS-U1-Ya No.1 (page does not exist)">DS-U1-Ya No.1</a></i></li> <li><a href="/w/index.php?title=OPS_5057&action=edit&redlink=1" class="new" title="OPS 5057 (page does not exist)">OPS 5057</a></li> <li><a href="/w/index.php?title=Kosmos_206&action=edit&redlink=1" class="new" title="Kosmos 206 (page does not exist)">Kosmos 206</a></li> <li><a href="/w/index.php?title=OPS_4849&action=edit&redlink=1" class="new" title="OPS 4849 (page does not exist)">OPS 4849</a></li> <li><a href="/w/index.php?title=OPS_7076&action=edit&redlink=1" class="new" title="OPS 7076 (page does not exist)">OPS 7076</a></li> <li><a href="/w/index.php?title=Kosmos_207&action=edit&redlink=1" class="new" title="Kosmos 207 (page does not exist)">Kosmos 207</a></li> <li><a href="/w/index.php?title=Kosmos_208&action=edit&redlink=1" class="new" title="Kosmos 208 (page does not exist)">Kosmos 208</a></li> <li><a href="/w/index.php?title=Kosmos_209&action=edit&redlink=1" class="new" title="Kosmos 209 (page does not exist)">Kosmos 209</a></li> <li><a href="/w/index.php?title=Kosmos_210&action=edit&redlink=1" class="new" title="Kosmos 210 (page does not exist)">Kosmos 210</a></li> <li><a href="/wiki/Apollo_6" title="Apollo 6">Apollo 6</a></li> <li><a href="/wiki/OV1-13" title="OV1-13">OV1-13</a></li> <li><a href="/wiki/OV1-14" title="OV1-14">OV1-14</a></li> <li><a href="/wiki/Luna_14" title="Luna 14">Luna 14</a></li> <li><a href="/wiki/Kosmos_211" title="Kosmos 211">Kosmos 211</a></li> <li><a href="/wiki/Kosmos_212" title="Kosmos 212">Kosmos 212</a></li> <li><a href="/wiki/Kosmos_213" title="Kosmos 213">Kosmos 213</a></li> <li><a href="/w/index.php?title=OPS_5165&action=edit&redlink=1" class="new" title="OPS 5165 (page does not exist)">OPS 5165</a></li> <li><a href="/wiki/Kosmos_214" title="Kosmos 214">Kosmos 214</a></li> <li><a href="/wiki/Kosmos_215" title="Kosmos 215">Kosmos 215</a></li> <li><a href="/w/index.php?title=Kosmos_216&action=edit&redlink=1" class="new" title="Kosmos 216 (page does not exist)">Kosmos 216</a></li> <li><a href="/w/index.php?title=Molniya-1_No.10&action=edit&redlink=1" class="new" title="Molniya-1 No.10 (page does not exist)">Molniya-1 No.10</a></li> <li><i><a href="/w/index.php?title=Soyuz_7K-L1_No.7L&action=edit&redlink=1" class="new" title="Soyuz 7K-L1 No.7L (page does not exist)">7K-L1 No.7L</a></i></li> <li><a href="/w/index.php?title=Kosmos_217&action=edit&redlink=1" class="new" title="Kosmos 217 (page does not exist)">Kosmos 217</a></li> <li><a href="/w/index.php?title=Kosmos_218&action=edit&redlink=1" class="new" title="Kosmos 218 (page does not exist)">Kosmos 218</a></li> <li><a href="/wiki/Kosmos_219" title="Kosmos 219">Kosmos 219</a></li> <li><a href="/w/index.php?title=OPS_1419&action=edit&redlink=1" class="new" title="OPS 1419 (page does not exist)">OPS 1419</a></li> <li><a href="/w/index.php?title=Kosmos_220&action=edit&redlink=1" class="new" title="Kosmos 220 (page does not exist)">Kosmos 220</a></li> <li><a href="/w/index.php?title=ESRO-2B&action=edit&redlink=1" class="new" title="ESRO-2B (page does not exist)">ESRO-2B</a></li> <li><i><a href="/wiki/Nimbus_B" title="Nimbus B">Nimbus B</a></i></li> <li><i><a href="/wiki/SECOR_10" class="mw-redirect" title="SECOR 10">SECOR 10</a></i></li> <li><a href="/w/index.php?title=OPS_7869&action=edit&redlink=1" class="new" title="OPS 7869 (page does not exist)">OPS 7869</a></li> <li><a href="/wiki/Kosmos_221" title="Kosmos 221">Kosmos 221</a></li> <li><a href="/wiki/Kosmos_222" title="Kosmos 222">Kosmos 222</a></li> <li><a href="/w/index.php?title=Kosmos_223&action=edit&redlink=1" class="new" title="Kosmos 223 (page does not exist)">Kosmos 223</a></li> <li><a href="/w/index.php?title=Kosmos_224&action=edit&redlink=1" class="new" title="Kosmos 224 (page does not exist)">Kosmos 224</a></li> <li><i><a href="/w/index.php?title=Sfera_No.12L&action=edit&redlink=1" class="new" title="Sfera No.12L (page does not exist)">Sfera No.12L</a></i></li> <li><a href="/w/index.php?title=OPS_5138&action=edit&redlink=1" class="new" title="OPS 5138 (page does not exist)">OPS 5138</a></li> <li><a href="/wiki/Kosmos_225" title="Kosmos 225">Kosmos 225</a></li> <li><a href="/w/index.php?title=Kosmos_226&action=edit&redlink=1" class="new" title="Kosmos 226 (page does not exist)">Kosmos 226</a></li> <li><a href="/wiki/Initial_Defense_Communications_Satellite_Program" title="Initial Defense Communications Satellite Program">IDCSP 20</a></li> <li><a href="/wiki/Initial_Defense_Communications_Satellite_Program" title="Initial Defense Communications Satellite Program">IDCSP 21</a></li> <li><a href="/wiki/Initial_Defense_Communications_Satellite_Program" title="Initial Defense Communications Satellite Program">IDCSP 22</a></li> <li><a href="/wiki/Initial_Defense_Communications_Satellite_Program" title="Initial Defense Communications Satellite Program">IDCSP 23</a></li> <li><a href="/wiki/Initial_Defense_Communications_Satellite_Program" title="Initial Defense Communications Satellite Program">IDCSP 24</a></li> <li><a href="/wiki/Initial_Defense_Communications_Satellite_Program" title="Initial Defense Communications Satellite Program">IDCSP 25</a></li> <li><a href="/wiki/Initial_Defense_Communications_Satellite_Program" title="Initial Defense Communications Satellite Program">IDCSP 26</a></li> <li><a href="/wiki/Initial_Defense_Communications_Satellite_Program" title="Initial Defense Communications Satellite Program">IDCSP 27</a></li> <li><i><a href="/w/index.php?title=Strela-2_No.3&action=edit&redlink=1" class="new" title="Strela-2 No.3 (page does not exist)">Strela-2 No.3</a></i></li> <li><a href="/w/index.php?title=Kosmos_227&action=edit&redlink=1" class="new" title="Kosmos 227 (page does not exist)">Kosmos 227</a></li> <li><a href="/w/index.php?title=OPS_5343&action=edit&redlink=1" class="new" title="OPS 5343 (page does not exist)">OPS 5343</a></li> <li><a href="/w/index.php?title=OPS_5259&action=edit&redlink=1" class="new" title="OPS 5259 (page does not exist)">OPS 5259</a></li> <li><a href="/w/index.php?title=Kosmos_228&action=edit&redlink=1" class="new" title="Kosmos 228 (page does not exist)">Kosmos 228</a></li> <li><a href="/w/index.php?title=Kosmos_229&action=edit&redlink=1" class="new" title="Kosmos 229 (page does not exist)">Kosmos 229</a></li> <li><a href="/wiki/Explorer_38" title="Explorer 38">Explorer 38</a></li> <li><a href="/wiki/Kosmos_230" title="Kosmos 230">Kosmos 230</a></li> <li><a href="/w/index.php?title=Molniya-1_No.13&action=edit&redlink=1" class="new" title="Molniya-1 No.13 (page does not exist)">Molniya-1 No.13</a></li> <li><a href="/w/index.php?title=Kosmos_231&action=edit&redlink=1" class="new" title="Kosmos 231 (page does not exist)">Kosmos 231</a></li> <li><a href="/wiki/OV1-15" title="OV1-15">OV1-15</a></li> <li><a href="/wiki/OV1-16" title="OV1-16">OV1-16</a></li> <li><a href="/w/index.php?title=Kosmos_232&action=edit&redlink=1" class="new" title="Kosmos 232 (page does not exist)">Kosmos 232</a></li> <li><a href="/wiki/Kosmos_233" title="Kosmos 233">Kosmos 233</a></li> <li><a href="/w/index.php?title=Kosmos_234&action=edit&redlink=1" class="new" title="Kosmos 234 (page does not exist)">Kosmos 234</a></li> <li><a href="/w/index.php?title=OPS_2222&action=edit&redlink=1" class="new" title="OPS 2222 (page does not exist)">OPS 2222</a></li> <li><a href="/w/index.php?title=OPS_5187&action=edit&redlink=1" class="new" title="OPS 5187 (page does not exist)">OPS 5187</a></li> <li><a href="/w/index.php?title=OPS_5955&action=edit&redlink=1" class="new" title="OPS 5955 (page does not exist)">OPS 5955</a></li> <li><a href="/wiki/Explorer_39" title="Explorer 39">Explorer 39</a></li> <li><a href="/wiki/Explorer_40" title="Explorer 40">Explorer 40</a></li> <li><a href="/w/index.php?title=Kosmos_235&action=edit&redlink=1" class="new" title="Kosmos 235 (page does not exist)">Kosmos 235</a></li> <li><a href="/wiki/ATS-4" title="ATS-4">ATS-4</a></li> <li><a href="/wiki/ESSA-7" title="ESSA-7">ESSA-7</a></li> <li><i><a href="/w/index.php?title=Orbiscal_1&action=edit&redlink=1" class="new" title="Orbiscal 1 (page does not exist)">Orbiscal 1</a></i></li> <li><i><a href="/wiki/OV5-8" title="OV5-8">OV5-8</a></i></li> <li><i><a href="/w/index.php?title=Gridsphere_1&action=edit&redlink=1" class="new" title="Gridsphere 1 (page does not exist)">Gridsphere 1</a></i></li> <li><i><a href="/w/index.php?title=Gridsphere_2&action=edit&redlink=1" class="new" title="Gridsphere 2 (page does not exist)">Gridsphere 2</a></i></li> <li><i><a href="/w/index.php?title=Gridsphere_B&action=edit&redlink=1" class="new" title="Gridsphere B (page does not exist)">Gridsphere B</a></i></li> <li><i><a href="/w/index.php?title=Gridsphere_R&action=edit&redlink=1" class="new" title="Gridsphere R (page does not exist)">Gridsphere R</a></i></li> <li><i><a href="/w/index.php?title=Lincoln_Calibration_Sphere_3&action=edit&redlink=1" class="new" title="Lincoln Calibration Sphere 3 (page does not exist)">LCS-3</a></i></li> <li><i><a href="/w/index.php?title=Large_Inclination_Doppler_Only_Satellite&action=edit&redlink=1" class="new" title="Large Inclination Doppler Only Satellite (page does not exist)">LIDOS</a></i></li> <li><i><a href="/wiki/SECOR_11" class="mw-redirect" title="SECOR 11">SECOR 11</a></i></li> <li><i><a href="/wiki/SECOR_12" class="mw-redirect" title="SECOR 12">SECOR 12</a></i></li> <li><i><a href="/wiki/Radcat" class="mw-redirect" title="Radcat">Radcat</a></i></li> <li><i><a href="/w/index.php?title=P68-1&action=edit&redlink=1" class="new" title="P68-1 (page does not exist)">P68-1</a></i></li> <li><a href="/w/index.php?title=Kosmos_236&action=edit&redlink=1" class="new" title="Kosmos 236 (page does not exist)">Kosmos 236</a></li> <li><a href="/w/index.php?title=Kosmos_237&action=edit&redlink=1" class="new" title="Kosmos 237 (page does not exist)">Kosmos 237</a></li> <li><a href="/wiki/Kosmos_238" title="Kosmos 238">Kosmos 238</a></li> <li><a href="/w/index.php?title=Kosmos_239&action=edit&redlink=1" class="new" title="Kosmos 239 (page does not exist)">Kosmos 239</a></li> <li><a href="/w/index.php?title=OPS_5247&action=edit&redlink=1" class="new" title="OPS 5247 (page does not exist)">OPS 5247</a></li> <li><a href="/w/index.php?title=Kosmos_240&action=edit&redlink=1" class="new" title="Kosmos 240 (page does not exist)">Kosmos 240</a></li> <li><a href="/wiki/Zond_5" title="Zond 5">Zond 5</a></li> <li><a href="/w/index.php?title=Kosmos_241&action=edit&redlink=1" class="new" title="Kosmos 241 (page does not exist)">Kosmos 241</a></li> <li><a href="/w/index.php?title=OPS_0165&action=edit&redlink=1" class="new" title="OPS 0165 (page does not exist)">OPS 0165</a></li> <li><a href="/w/index.php?title=OPS_8595&action=edit&redlink=1" class="new" title="OPS 8595 (page does not exist)">OPS 8595</a></li> <li><i><a href="/wiki/Intelsat_III_F-1" title="Intelsat III F-1">Intelsat III F-1</a></i></li> <li><a href="/wiki/Kosmos_242" title="Kosmos 242">Kosmos 242</a></li> <li><a href="/w/index.php?title=Kosmos_243&action=edit&redlink=1" class="new" title="Kosmos 243 (page does not exist)">Kosmos 243</a></li> <li><a href="/w/index.php?title=Lincoln_Experimental_Satellite_6&action=edit&redlink=1" class="new" title="Lincoln Experimental Satellite 6 (page does not exist)">LES-6</a></li> <li><a class="mw-selflink selflink">OV2-5</a></li> <li><a href="/wiki/Environmental_Research_Satellite_21" class="mw-redirect" title="Environmental Research Satellite 21">ERS-21</a></li> <li><a href="/wiki/Environmental_Research_Satellite_28" class="mw-redirect" title="Environmental Research Satellite 28">ERS-28</a></li> <li><a href="/w/index.php?title=Kosmos_244&action=edit&redlink=1" class="new" title="Kosmos 244 (page does not exist)">Kosmos 244</a></li> <li><a href="/wiki/Kosmos_245" title="Kosmos 245">Kosmos 245</a></li> <li><a href="/w/index.php?title=ESRO-1A&action=edit&redlink=1" class="new" title="ESRO-1A (page does not exist)">ESRO-1A</a></li> <li><a href="/w/index.php?title=Molniya-1_No.14&action=edit&redlink=1" class="new" title="Molniya-1 No.14 (page does not exist)">Molniya-1 No.14</a></li> <li><a href="/w/index.php?title=OPS_0964&action=edit&redlink=1" class="new" title="OPS 0964 (page does not exist)">OPS 0964</a></li> <li><a href="/w/index.php?title=Kosmos_246&action=edit&redlink=1" class="new" title="Kosmos 246 (page does not exist)">Kosmos 246</a></li> <li><a href="/w/index.php?title=Kosmos_247&action=edit&redlink=1" class="new" title="Kosmos 247 (page does not exist)">Kosmos 247</a></li> <li><u><a href="/wiki/Apollo_7" title="Apollo 7">Apollo 7</a></u></li> <li><a href="/w/index.php?title=Kosmos_248&action=edit&redlink=1" class="new" title="Kosmos 248 (page does not exist)">Kosmos 248</a></li> <li><a href="/w/index.php?title=Kosmos_249&action=edit&redlink=1" class="new" title="Kosmos 249 (page does not exist)">Kosmos 249</a></li> <li><a href="/w/index.php?title=OPS_4078&action=edit&redlink=1" class="new" title="OPS 4078 (page does not exist)">OPS 4078</a></li> <li><a href="/wiki/Soyuz_2" title="Soyuz 2">Soyuz 2</a></li> <li><u><a href="/wiki/Soyuz_3" title="Soyuz 3">Soyuz 3</a></u></li> <li><a href="/w/index.php?title=Kosmos_250&action=edit&redlink=1" class="new" title="Kosmos 250 (page does not exist)">Kosmos 250</a></li> <li><a href="/w/index.php?title=Kosmos_251&action=edit&redlink=1" class="new" title="Kosmos 251 (page does not exist)">Kosmos 251</a></li> <li><a href="/w/index.php?title=Kosmos_252&action=edit&redlink=1" class="new" title="Kosmos 252 (page does not exist)">Kosmos 252</a></li> <li><a href="/w/index.php?title=OPS_1315&action=edit&redlink=1" class="new" title="OPS 1315 (page does not exist)">OPS 1315</a></li> <li><a href="/w/index.php?title=OPS_5296&action=edit&redlink=1" class="new" title="OPS 5296 (page does not exist)">OPS 5296</a></li> <li><a href="/wiki/Pioneer_9" class="mw-redirect" title="Pioneer 9">Pioneer 9</a></li> <li><a href="/wiki/Environmental_Research_Satellite_31" class="mw-redirect" title="Environmental Research Satellite 31">ERS-31</a></li> <li><a href="/wiki/Zond_6" title="Zond 6">Zond 6</a></li> <li><a href="/w/index.php?title=Kosmos_253&action=edit&redlink=1" class="new" title="Kosmos 253 (page does not exist)">Kosmos 253</a></li> <li><a href="/wiki/Proton_4" class="mw-redirect" title="Proton 4">Proton 4</a></li> <li><a href="/w/index.php?title=Kosmos_254&action=edit&redlink=1" class="new" title="Kosmos 254 (page does not exist)">Kosmos 254</a></li> <li><a href="/w/index.php?title=Kosmos_255&action=edit&redlink=1" class="new" title="Kosmos 255 (page does not exist)">Kosmos 255</a></li> <li><i><a href="/w/index.php?title=STV-1&action=edit&redlink=1" class="new" title="STV-1 (page does not exist)">STV-1</a></i></li> <li><a href="/w/index.php?title=Kosmos_256&action=edit&redlink=1" class="new" title="Kosmos 256 (page does not exist)">Kosmos 256</a></li> <li><a href="/wiki/Kosmos_257" title="Kosmos 257">Kosmos 257</a></li> <li><a href="/w/index.php?title=OPS_6518&action=edit&redlink=1" class="new" title="OPS 6518 (page does not exist)">OPS 6518</a></li> <li><a href="/w/index.php?title=HEOS-1&action=edit&redlink=1" class="new" title="HEOS-1 (page does not exist)">HEOS-1</a></li> <li><a href="/wiki/Orbiting_Astronomical_Observatory_2" title="Orbiting Astronomical Observatory 2">OAO-2</a></li> <li><a href="/w/index.php?title=Kosmos_258&action=edit&redlink=1" class="new" title="Kosmos 258 (page does not exist)">Kosmos 258</a></li> <li><a href="/w/index.php?title=OPS_4740&action=edit&redlink=1" class="new" title="OPS 4740 (page does not exist)">OPS 4740</a></li> <li><a href="/w/index.php?title=OPS_7684&action=edit&redlink=1" class="new" title="OPS 7684 (page does not exist)">OPS 7684</a></li> <li><a href="/wiki/Kosmos_259" title="Kosmos 259">Kosmos 259</a></li> <li><a href="/wiki/ESSA-8" title="ESSA-8">ESSA-8</a></li> <li><a href="/w/index.php?title=Kosmos_260&action=edit&redlink=1" class="new" title="Kosmos 260 (page does not exist)">Kosmos 260</a></li> <li><a href="/wiki/Intelsat_III_F-2" title="Intelsat III F-2">Intelsat III F-2</a></li> <li><a href="/wiki/Kosmos_261" title="Kosmos 261">Kosmos 261</a></li> <li><u><a href="/wiki/Apollo_8" title="Apollo 8">Apollo 8</a></u></li> <li><a href="/wiki/Kosmos_262" title="Kosmos 262">Kosmos 262</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div>Payloads are separated by bullets ( · ), launches by pipes ( | ). Crewed flights are indicated in <u>underline</u>. Uncatalogued launch failures are listed in <i>italics</i>. Payloads deployed from other spacecraft are denoted in (brackets).</div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=OV2-5&oldid=1257379283">https://en.wikipedia.org/w/index.php?title=OV2-5&oldid=1257379283</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Category</a>: <ul><li><a href="/wiki/Category:Spacecraft_launched_in_1968" title="Category:Spacecraft launched in 1968">Spacecraft launched in 1968</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/wiki/Category:CS1_maint:_multiple_names:_authors_list" title="Category:CS1 maint: multiple names: authors list">CS1 maint: multiple names: authors list</a></li><li><a href="/wiki/Category:Articles_with_short_description" title="Category:Articles with short description">Articles with short description</a></li><li><a href="/wiki/Category:Short_description_matches_Wikidata" title="Category:Short description matches Wikidata">Short description matches Wikidata</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 14 November 2024, at 16:36<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. 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