画像:Phobos moon (large).jpg
出典: フリー百科事典『ウィキペディア（Wikipedia）』
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from en:Image:Phobos_moon_(large).jpg
A detailed image of Phobos, taken by Mars Global Surveyor on June 1, 2003.
The high resolution image was taken at the same time as the wide angle views. MGS was about 9,670 kilometers (6,010 miles) from Phobos when the picture was taken. At this distance, the image resolution is about 36 meters (470 ft.) per pixel; the maximum dimension of Phobos as seen in this image (the diagonal from lower left to upper right) is just over 24 km (15 mi). This is the "trailing" hemisphere, the part of Phobos that faces opposite the direction that the moon orbits Mars. This is a part of Phobos that was not seen by MOC in 1998, when MGS made several close flybys of the tiny moon.
Credit: NASA/JPL/Malin Space Science Systems
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