Cosmos (3 sat)

Launch data:

Spacecraft data:

Mission details:

• A Proton-M was launched on Dec 6, 2010 carrying three Uragan-M satellites for the Glonass system. The third stage went off course because an extra 1500 kg of propellant was loaded in the fourth stage by mistake; the extra mass caused the final velocity to be around 100 m/s too low, leading to an orbit to have been around -150 x 165 km x 64.8 deg.
• The third stage and, separately, the upper composite consisting of the satellites mounted on the Blok DM-3 stage re-entered over the Pacific on their first revolution.
  Federal Space Agency news releases reported the satellite names as "Glonass-M".