http://wiki.newmars.com/index.php?action=history&feed=atom&title=Phobos 2026-05-23T22:13:03Z Revision history for this page on the wiki MediaWiki 1.29.1 http://wiki.newmars.com/index.php?title=Phobos&diff=421&oldid=prev 2009-01-21T11:02:34Z

<p>1 revision</p> <table class="diff diff-contentalign-left" data-mw="interface"> <tr style='vertical-align: top;' lang='en'> <td colspan='1' style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan='1' style="background-color: white; color:black; text-align: center;">Revision as of 11:02, 21 January 2009</td> </tr><tr><td colspan='2' style='text-align: center;' lang='en'><div class="mw-diff-empty">(No difference)</div> </td></tr></table>

Josh Cryer http://wiki.newmars.com/index.php?title=Phobos&diff=420&oldid=prev 2006-01-29T22:14:03Z

<p>Removed link to &#039;&#039;day&#039;&#039;</p> <p><b>New page</b></p><div>Phobos is the largest moon of the planet [[Mars]]. Phobos and Mars&#039;s other moon, [[Deimos]], were discovered by Asaph Hall in 1877. <br /> <br /> Its orbital period is 0.31910 Earth days, and its rotation is tidally locked to the same period so that one side of Phobos always faces the planet Mars. Its [[orbital inclination]] is 1.075 degrees from the martian equator. Its orbit is mildly eccentric ([[orbital eccentricity]] of 0.01) with a [[semi-major axis]] of 9378.5 km or about 2.5 Mars radii. This makes Phobos the closest orbiting moon in the solar system in terms of planetary radii. Phobos is just outside the [[Roche Limit]] of Mars, and is expected to be broken up by tidal forces during the next 50 million years.<br /> <br /> Phobos is a relatively small moon, with oblong dimensions of 27 km x 18 km and a mass of 1.08 x &lt;math&gt;10^1&lt;/math&gt;&lt;math&gt;^3&lt;/math&gt; tons. It&#039;s surface spectra and [[albedo]] are similar to [[carbonaceous chondrite]] [[asteroid]]s, and it has a mean [[density]] of about 2000 kg/m&lt;math&gt;^3&lt;/math&gt;. The largest crater on the moon, [[Stickney]], has a radius of approximately 10 km, more than half the smaller diameter of Phobos. <br /> <br /> == Missions to Phobos ==<br /> <br /> Phobos has been visited by several space probes:<br /> <br /> [[Mariner]] 9<br /> [[Viking]] 1 Orbiter<br /> [[Phobos 2]]<br /> [[Mars Global Surveyor]]<br /> [[Mars Express]]<br /> <br /> The majority of space probe encounters with Phobos have been [[fly-by]] only. The Phobos 2 mission attempted a landing, but failed. High resolution photographs and surface spectra are available from all of these space probes.<br /> <br /> == External Links ==<br /> <br /> * [http://en.wikipedia.org/wiki/Phobos_%28moon%29 Wikipedia Article on Phobos]<br /> * [http://www.solarviews.com/eng/phobos12.htm Solarviews Phobos 2 Image Gallery]<br /> * [http://www.iki.rssi.ru/IPL/phobos.html some of IKI&#039;s Phobos-2 image processing results]<br /> * [http://pages.preferred.com/%7Etedstryk/phobos2.html Ted Stryk&#039;s awesome Phobos-2 reprocessed imagery]</div>

Maxie