Phobos - Viking 1 Orbiter

South eastern anti-Mars quadrant of Phobos from 500 km

Phobos
Viking 1 orbiter view of the southeastern quadrant of the anti-Mars side of Phobos. The south pole is just off the lower right corner and the image is centered at about 15 S, 240 W. The frame is about 17 km across. The surface of Phobos is dark and heavily cratered, and the moon orbits Mars every 7 hours and 39 minutes. The craters on the limb are about 4 km across and hundreds of meters deep. (Viking Orbiter 246A68)
Larger image:

High resolution tiff file (1.0 Mb)

Location & Time Information
Date/Time (UT): 1977-02-22 T 23:08:10
Distance/Range (km): 619.4
Central Latitude/Longitude (deg): -15.,240
Orbit(s): 246

Imaging Information
Area or Feature Type: crater
Instrument: Visual Imaging Subsystem - Camera B
Instrument Resolution (pixels): 1056 x 1182, 7 bit
Instrument Field of View (deg): 1.54 x 1.69
Filter: clear (4)
Illumination Incidence Angle (deg): N/A
Phase Angle (deg): 85
Instrument Look Direction: N/A
Surface Emission Angle (deg): N/A

Ordering Information
CD-ROM Volume: VO_1014
NASA Image ID number: 246A68
Other Image ID number: 30682815
NSSDC Data Set ID (Photo): 75-075A-01B
NSSDC Data Set ID (CD): 75-075A-01c
Other ID: N/A

Updated 20 May 2003, DRW.