Progress M-31

Progress M-31 (Russian: Прогресс M-31) was a Russian unmanned Progress cargo spacecraft, which was launched in May 1996 to resupply the Mir space station.

Progress M-31

A Progress-M spacecraft
Mission type	Mir resupply
COSPAR ID	1996-028A
SATCAT no.	23860[1]
Spacecraft properties
Spacecraft	Progress (No.231)
Spacecraft type	Progress-M[2]
Manufacturer	RKK Energia
Start of mission
Launch date	5 May 1996, 07:04:18 UTC[1]
Rocket	Soyuz-U[2]
Launch site	Baikonur, Site 1/5
End of mission
Disposal	Deorbited
Decay date	1 August 1996, 20:33:03 UTC[3]
Orbital parameters
Reference system	Geocentric
Regime	Low Earth
Perigee altitude	186 km[4]
Apogee altitude	227 km[4]
Inclination	51.6°[4]
Period	88.6 minutes[4]
Epoch	5 May 1996
Docking with Mir
Docking port	Mir Core Module forward[4]
Docking date	7 May 1996, 08:54:19 UTC
Undocking date	1 August 1996, 16:44:54 UTC
Progress (spacecraft) ← Progress M-30 Progress M-32 →

Launch

Progress M-31 launched on 5 May 1996 from the Baikonur Cosmodrome in Kazakhstan. It used a Soyuz-U rocket.^[2][5]

Docking

Progress M-31 docked with the forward port of the Mir Core Module on 7 May 1996 at 08:54:19 UTC, and was undocked on 1 August 1996 at 16:44:54 UTC.^[3][4]

Decay

It remained in orbit until 1 August 1996, when it was deorbited. The deorbit burn occurred at 19:44:30 UTC and the mission ended at 20:33:03 UTC.^[3][4]

See also

• Spaceflight portal

• 1996 in spaceflight
• List of Progress missions
• List of uncrewed spaceflights to Mir