Progress 21

Progress 21 (Russian: Прогресс 21) was a Soviet uncrewed Progress cargo spacecraft, which was launched in May 1984 to resupply the Salyut 7 space station.

Progress 21
A Progress 7K-TG spacecraft
Mission typeSalyut 7 resupply
COSPAR ID1984-042A
SATCAT no.14961[1]
Spacecraft properties
SpacecraftProgress (No.116)
Spacecraft typeProgress 7K-TG[2]
ManufacturerNPO Energia
Start of mission
Launch date7 May 1984, 22:47:15 UTC[1]
RocketSoyuz-U[2]
Launch siteBaikonur, Site 31/6
End of mission
DisposalDeorbited
Decay date26 May 1984, 15:00:30 UTC[3]
Orbital parameters
Reference systemGeocentric
RegimeLow Earth
Perigee altitude187 km[3]
Apogee altitude246 km[3]
Inclination51.6°[3]
Period88.8 minutes[3]
Epoch26 May 1984
Docking with Salyut 7
Docking portAft[3]
Docking date10 May 1984, 00:10 UTC
Undocking date26 May 1984, 09:41 UTC
 

Launch

Progress 21 launched on 7 May 1984 from the Baikonur Cosmodrome in the Kazakh SSR. It used a Soyuz-U rocket.[2][4]

Docking

Progress 21 docked with the aft port of Salyut 7 on 10 May 1984 at 00:10 UTC, and was undocked on 26 May 1984 at 09:41 UTC.[3][5]

Decay

It remained in orbit until 26 May 1984, when it was deorbited. The deorbit burn occurred at 15:00:30 UTC, with the mission ending at around 15:45 UTC.[3][5]

See also

References
  1. "Launchlog". Jonathan's Space Report. Retrieved 5 December 2020.
  2. "Progress 1 - 42 (11F615A15, 7K-TG)". Gunter's Space Page. Retrieved 5 December 2020.
  3. "Cargo spacecraft "Progress 21"". Manned Astronautics figures and facts. Archived from the original on 13 October 2007.
  4. "Progress 21". NASA. Retrieved 5 December 2020. This article incorporates text from this source, which is in the public domain.
  5. "Salyut 7". Astronautix. Retrieved 5 December 2020.
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