Progress M-55

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Progress M-55
Progress M-55 undocking from ISS.jpg
Progress M-55 departing the ISS
Mission type ISS resupply
Operator Roskosmos
COSPAR ID 2005-047A
Spacecraft properties
Spacecraft type Progress-M 11F615A55
Manufacturer RKK Energia
Start of mission
Launch date 21 December 2005, 18:38:20 (2005-12-21UTC18:38:20Z) UTC
Rocket Soyuz-U
Launch site Baikonur Site 1/5
End of mission
Disposal Deorbited
Decay date 19 June 2006, 17:53:14 (2006-06-19UTC17:53:15Z) UTC
Orbital parameters
Reference system Geocentric
Regime Low Earth
Inclination 51.6 degrees
Docking with ISS
Docking port Pirs
Docking date 23 December 2005, 19:46:18 UTC
Undocking date 19 June 2006, 14:06:01 UTC
Time docked 6 months

Progress M-55, identified by NASA as Progress 20 or 20P, was a Progress spacecraft used to resupply the International Space Station. It was a Progress-M 11F615A55 spacecraft, with the serial number 355.[1]

Progress M-55 was launched by a Soyuz-U carrier rocket from Site 1/5 at the Baikonur Cosmodrome. Launch occurred at 18:38:20 GMT on 21 December 2005.[1] The spacecraft docked with the Pirs module at 19:46:18 GMT on 23 December.[2][3] It remained docked for almost six months before undocking at 14:06:01 GMT on 19 June 2006[2] to make way for Progress M-57.[4] It was deorbited at 17:06:01 GMT on 19 June 2006.[2] The spacecraft burned up in the atmosphere over the Pacific Ocean, with any remaining debris landing in the ocean at around 17:53:14 GMT.[2][5]

Progress M-55 carried supplies to the International Space Station, including food, water and oxygen for the crew and equipment for conducting scientific research.

See also[edit]


  1. ^ a b McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 2009-06-06. 
  2. ^ a b c d Anikeev, Alexander. "Cargo spacecraft "Progress M-55"". Manned Astronautics - Figures & Facts. Retrieved 2009-06-06. 
  3. ^ Wade, Mark. "Progress M". Encyclopedia Astronautica. Retrieved 2009-06-06. 
  4. ^ Zak, Anatoly. "Progress cargo ship". RussianSpaceWeb. Retrieved 2009-06-06. 
  5. ^ McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 2009-06-06.