National Aeronautics and Space Administration Logo
Follow this link to skip to the main content NASA Banner
Solar System Exploration
Missions
Fobos 2
 By Target   By Name   By Decade 
Fobos 2
Fobos 2 Mission to Mars

Goals: Fobos 1 and 2 were part of an ambitious Russian plan to explore Mars and its moon Phobos. Each spacecraft comprised an orbiter for long term studies of the planet and a lander to study geological and climatic conditions on Phobos. Fobos 2 had an additional payload on board, a 110-kg "hopper" designed to make up to ten 20-m jumps across the Phobos surface to gather surface data on the tiny Martian moon. Fobos 2 also had a slightly different instrument complement.

Accomplishments: Fobos 2 did take high-resolution photos of Mars' moon Phobos on 23 February (at a range of 860 km), 28 February (320 km) and 25 March 1989 (191 km). However before the release of its lander, scheduled for 4-5 April 1989, during a regularly planned communications session on 27 March at 15:58 UT, there was no word from the spacecraft. A weak signal was received between 17:51 and 18:03 UT, but there was no telemetry information. The mission was declared lost on 15 April 1989.


Key Dates
12 Jul 1988:  Launch
15 Apr 1989:  End of Mars Mission
Status: Contact Lost
Fast Facts
Fobos 2 Facts Fobos 2 had a 110-kg "hopper" on board designed to make up to ten 20-m jumps across the Phobos surface to gather surface data on the tiny Martian moon (right).

Both Fobos 1 and Fobos 2 failed to complete their missions.

The most probable cause of Fobos 2's failure was simultaneous malfunctions in both channels of the onboard computer.
Links
Awards and Recognition   Solar System Exploration Roadmap   Contact Us   Site Map   Print This Page
NASA Official: Kristen Erickson
Advisory: Dr. James Green, Director of Planetary Science
Outreach Manager: Alice Wessen
Curator/Editor: Phil Davis
Science Writer: Autumn Burdick
Producer: Greg Baerg
Webmaster: David Martin
> NASA Science Mission Directorate
> Budgets, Strategic Plans and Accountability Reports
> Equal Employment Opportunity Data
   Posted Pursuant to the No Fear Act
> Information-Dissemination Policies and Inventories
> Freedom of Information Act
> Privacy Policy & Important Notices
> Inspector General Hotline
> Office of the Inspector General
> NASA Communications Policy
> USA.gov
> ExpectMore.gov
> NASA Advisory Council
> Open Government at NASA
Last Updated: 10 Dec 2010