|Mission type||ISS resupply|
|Mission duration||77 days|
|Spacecraft type||Progress-M s/n 351|
|Start of mission|
|Launch date||23 December 2004,|
|Launch site||Baikonur, Site 1/5|
|End of mission|
|Decay date||9 March 2005, 17:03:11 UTC|
|Perigee altitude||351 km|
|Apogee altitude||356 km|
|Epoch||23 December 2004|
|Docking with ISS|
|Docking port||Zvezda aft|
|Docking date||25 December 2004,|
|Undocking date||27 February 2005, 16:06:30 UTC|
|Time docked||64 days|
Progress M-51 (Russian: Прогресс М-51), identified by NASA as Progress 16P, was a Progress spacecraft used to resupply the International Space Station. It was a Progress-M 11F615A55 spacecraft, with the serial number 351.
Progress M-51 was launched by a Soyuz-U carrier rocket from Site 1/5 at the Baikonur Cosmodrome. Launch occurred at 22:19:34 UTC on 23 December 2004.
The spacecraft docked with the aft port of the Zvezda module at 23:57:45 UTC on 25 December 2004. It remained docked for 64 days before undocking at 16:06:30 UTC on 27 February 2005. to make way for Progress M-52 Between undocking and deorbit, Progress M-51 was used for a series of tests. It was deorbited at 16:17:00 UTC on 9 March 2005. The spacecraft burned up in the atmosphere over the Pacific Ocean, with any remaining debris landing in the ocean at around 17:03:11 UTC.
Progress M-51 carried supplies to the International Space Station, including food, water and oxygen for the crew and equipment for conducting scientific research.