Mars - Viking 2 Orbiter

Summit of Alba Volcano, Mars

This Viking 2 Orbiter image shows the summit of the Martian volcano Alba Patera. Alba is about 1700 km in diameter, but only a few km higher than the surroundings, much flatter than the Tharsis volcanoes. Part of an old caldera rim can be seen at the bottom left of the image, most has been covered by later lava flows, emanating from the younger caldera at the lower right of the image. The flows can be seen extending to the north, which is at ~11:00. The image is about 180 km across. (Viking Orbiter 007B94)
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High resolution tiff file (1.0 Mb)

Location & Time Information
Date/Time (UT): 1976-08-15 T 12:11:37
Distance/Range (km): 4454.2
Central Latitude/Longitude (deg): +41.24/109.31
Orbit(s): 7

Imaging Information
Area or Feature Type: Volcano, Caldera
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): 88.39
Phase Angle (deg): 64.46
Instrument Look Direction: N/A
Surface Emission Angle (deg): 44.18

Ordering Information
CD-ROM Volume: VO_1051
NASA Image ID number: 007B94
Other Image ID number: 46637219
NSSDC Data Set ID (Photo): 75-083A-01D
NSSDC Data Set ID (CD): 75-083A-01a
Other ID: N/A
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Updated 23 May 2003, DRW.