Phobos - Viking 1 Orbiter

Eastern hemisphere, anti-Mars side of Phobos from 480 km

Viking 1 Orbiter image of the Martian moon Phobos. This image was taken from about 600 km on orbit 242 on 19 February 1977, the first encounter of Viking with Phobos. The terminator runs along the anti-Mars longitude (180 W) and most of the eastern hemisphere of this side is visible. The South pole is just off the lower center of the frame. The portion shown here is roughly 18 km from top to bottom. (Viking Orbiter 242A19)
Larger image: 267K

High resolution tiff file (1.0M)

Location & Time Information
Date/Time (UT): 1977-02-19 T 03:17:15
Distance/Range (km): 629.7
Central Latitude/Longitude (deg): -15.0, 198
Orbit(s): 242

Imaging Information
Area or Feature Type: global view
Instrument: Visual Imaging Subsystem - Camera A
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): 15
Instrument Look Direction: N/A
Surface Emission Angle (deg): N/A

Ordering Information
CD-ROM Volume: VO_1014
NASA Image ID number: 242A19
Other Image ID number: 30609008
NSSDC Data Set ID (Photo): 75-075A-01B
NSSDC Data Set ID (CD): 75-075A-01c
Other ID: N/A


[NASA Logo] Authors/Curators:

Dave Williams,, (301) 286-1258
Code 690.1, NASA Goddard Space Flight Center
Greenbelt, MD 20771, USA

Jay Friedlander,, (301) 286-7172
Code 612.4, NASA Goddard Space Flight Center
Greenbelt, MD 20771, USA

NASA Official: Ed Grayzeck,

Last updated: 24 September 2015