A Viking orbiting spacecraft successfully obtained pictures of the martian satellite Phobos with Mars in the background. This is the first time that a single picture was obtained from a spacecraft which contained both a planet and a moon and had significant surface detail visible on both. The region of Mars below Phobos included volcanoes in the Tharsis Montes region. These pictures showed Phobos to be smaller than previously thought. The image of Phobos can be used as a control point to determine the map coordinates of surface features on Mars.
Phobos transit of Mars as viewed by the Viking cameras
Science ; 199
1978-03-17
Miscellaneous
No indication
English
Experimental Data on Aerosols on Mars: Viking, Phobos and Future Missions
British Library Conference Proceedings | 1995
|Experimental Data on Aerosols on Mars: Viking, Phobos and Future Missions
Online Contents | 1995
|Phobos: Close encounter imaging from the Viking Orbiters
NTRS | 1984
|Phobos: Close Encounter Imaging from the Viking Orbiters
NTIS | 1984
|Mars/Phobos Transportation System
NTIS | 1989