Progress MS-21
Progress MS-21 approaches the ISS
NamesProgress 82P
Mission typeISS resupply
COSPAR ID2022-140A Edit this at Wikidata
SATCAT no.54155Edit this on Wikidata
Mission duration116 days, 2 hours and 55 minutes
Spacecraft properties
SpacecraftProgress MS-21 no.451
Spacecraft typeProgress MS
Launch mass7000 kg
Payload mass2.5 tons
Start of mission
Launch date26 October 2022, 00:20:09
Launch siteBaikonur, Site 31
ContractorProgress Rocket Space Centre
End of mission
Decay date19 February 2023, 03:15 UTC
Orbital parameters
Reference systemGeocentric orbit
RegimeLow Earth orbit
Docking with ISS
Docking portPoisk zenith
Docking date28 October 2022, 02:49:03 UTC
Undocking date18 February 2023, 02:26 UTC
Time docked112 days and 23 hours
Cargo and SCCS part of MLM Means of Attachment of Large payloads
Progress ISS Resupply

Progress MS-21 (Russian: Прогресс МC-21), Russian production No.451, identified by NASA as Progress 82P, was a Progress spaceflight launched by Roscosmos to resupply the International Space Station (ISS). It was the 174th flight of a Progress spacecraft.


The Progress-MS is an uncrewed freighter based on the Progress-M featuring improved avionics. This improved variant first launched on 21 December 2015. It has the following improvements:[1][2][3][4]


On 3 February 2021, the State Commission for Testing of the Piloted Space Systems, chaired by Roskosmos head Dmitry Rogozin, approved the latest ISS schedule for 2021 and the first quarter of 2022.

A Soyuz-2.1a launched Progress MS-21 to the International Space Station from Baikonur Site 31 on 26 October 2022. Around 2 days after the launch, Progress MS-21 automatically docked with Poisk and continues its mission, supporting Expedition 68 aboard the ISS.


The MS-21 cargo capacity is 2,520 kg (5,560 lb) as follows:

Means of attachment of large payloads

It delivered SCCS part of MLM Means of Attachment of Large payloads (Sredstva Krepleniya Krupnogabaritnykh Obyektov, SKKO) work platform to ISS.[5][6][7] Coupled with LCCS part of this MLM outfitting,[8] delivered to ISS by Progress MS-18, during VKD-55 spacewalk, it was transferred over to Nauka and installed it at the ERA base point facing aft where ERA use to be when it was launched, where it will be used to mount payloads on the exterior of Nauka module.[9][10][11][12]

Coolant pressure accident

On 11 February 2023, the freighter lost coolant pressure days before undocking from ISS, with no impact to the station as cargo had been unloaded and the spacecraft had been loaded with waste to be discarded. This incident was similar to the Soyuz MS-22 coolant loop accident in December 2022. It was undocked on 18 February 2023 as per previous schedule, after which burned in the Earth's atmosphere after deorbit.[13]

See also


  1. ^ Krebs, Gunter (1 December 2015). "Progress-MS 01-19". Gunter's Space Page. Retrieved 3 October 2020.
  2. ^ "Progress MS-20". NSSDCA. NASA. 10 February 2021. Retrieved 2 April 2021. Public Domain This article incorporates text from this source, which is in the public domain.
  3. ^ Zak, Anatoly. "Progress-MS cargo ship series". RussianSpaceWeb. Retrieved 3 October 2020.
  4. ^ Blau, Patrick (1 December 2015). "Progress MS Spacecraft". Spaceflight101. Retrieved 17 November 2020.
  5. ^ "Год «Науки» на МКС".
  6. ^ "Russia to bump its ISS crew back to three". Retrieved 25 March 2022.
  7. ^ Roscosmos. "MLM-U Structure diagram".
  8. ^ Navin, Joseph (17 November 2022). "Three spacewalks completed across two days on two space stations". Retrieved 30 January 2024.
  9. ^ Garcia, Mark (16 November 2022). "Cosmonauts Prep for Thursday Spacewalk, Dragon Targets Monday Launch". NASA. Archived from the original on 10 December 2022. Retrieved 16 November 2022.
  10. ^ Lavelle, Heidi (17 November 2022). "Cosmonauts Begin First in a Series of Spacewalks for Station Maintenance". NASA. Archived from the original on 24 March 2023. Retrieved 17 November 2022.
  11. ^ Garcia, Mark (17 November 2022). "Cosmonauts Finish Spacewalk for Work on Science Module". NASA. Archived from the original on 29 March 2023. Retrieved 17 November 2022.
  12. ^ Pearlman, Robert Z. (17 November 2022). "Russian cosmonauts complete station spacewalk to ready radiator for move". Archived from the original on 31 March 2023. Retrieved 23 November 2022.
  13. ^ "Russian spacecraft loses pressure, station crew safe". AP NEWS. 11 February 2023. Retrieved 11 February 2023.