Mars - Viking 1 Orbiter

Hydaspis Chaos and Tiu Vallis, Mars

This Viking 1 Orbiter image of Mars shows Tiu Vallis on the left and Hydaspis Chaos on the right. Hydaspis is chaotic terrain almost 100 km wide. Tiu Vallis emerges from this terrain as a 50 km wide channel displaying lineated bedforms and teardrop- shaped islands which extends to the north for 1000 km to Chryse Planitia. The frame is about 80 km across, and north is at ~11:30. (Viking Orbiter 083A37)
Larger image: 451K

High resolution tiff file (1.0M)

Location & Time Information
Date/Time (UT): 1976-09-12 T 16:34:47
Distance/Range (km): 2700.6
Central Latitude/Longitude (deg): +03.32/026.77
Orbit(s): 83

Imaging Information
Area or Feature Type: Chaotic Terrain, Vallis, Valley
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): 21.53
Phase Angle (deg): 26.77
Instrument Look Direction: N/A
Surface Emission Angle (deg): 12.67

Ordering Information
CD-ROM Volume: VO_1012
NASA Image ID number: 083A37
Other Image ID number: 27533976
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