From the National Space Science Data Center Image Gallery
This is Viking 1 Orbiter's global view of the Martian satellite Phobos. The 10 km diameter Stickney crater is at the left, centered at 5 S, 55 W. The Mars facing point is at the bottom center of Phobos, and the north pole is at about 1:00 from this point. Radiating grooves and crater chains can be seen around Stickney. Phobos is roughly 20 km across. (Viking Orbiter 357A64)
Image Title: Mars' Moon Phobos and Stickney Crater From 1600 km
Text based on internet materials accompanying Viking Orbiter photograph 357A64
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Last Modified On: Saturday, December 16, 2000