Mission To Mars -- Mars exploration to map and discover if there is life on Mars?

On orbit empty mass: 893.5 kg

The launch of Mars 1 was successfully launched towards Mars. A leak was detected from a orientation control valve, so the satellite was switched to gyroscopic stabilization. On March 21, 1963 all communication was lost with the satellite. On June 19, 1963 Mars 1 made its closest approach to Mars at 193,000 km, after which Mars 1 entered an elliptical orbit around Mars. Having reached Mars, the Mars 1 spacecraft was unable to send any data or photographs back to Earth because of the communication problem. This was likely the result of its inability to maintain its orientation.

More detailed information is available on the NASA Database at:

http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=1962-061A