Cargo spacecraft "Progress M-31"

The Progress M-31 cargo ship, spacecraft No. 231, was launched on May 5, 1996. It will deliver 1140 kg of fuel and 1700 kg of cargo to the Mir complex. The Progress is a modified Soyuz with a fuel tank in place of the descent module, and is built by RKK Energiya for the Russian Space Agency.
The Progress docked at the -X port on Mir at 0854 UTC on May 7. On Apr 27 the Priroda (spacecraft No. 77KSI) module was rotated from -X to +Z. The batteries used to power Priroda on its trip to Mir have been removed from the module and will be placed in Progress M-31 for disposal during reentry.
Progress M-31, undocked from the -X port on Aug 01 at 1645 UTC and was deorbited over the south Pacific later that day.

Orbital parameters:
- inclination (degrees)	51.6
- period (minutes)	88.6
- perigee (km)	186
- apogee (km)	227
Summary	Delivery of cargo to the orbital station "Mir"

Ref.: #7(JR286,295), #10, #21, #125, #210 - update: 20.02.11