|Mission type||International Space Station resupply|
|Mission duration||95 days|
|Spacecraft type||Progress-M1 s/n 255|
|Start of mission|
|Launch date||20 May 2001, 22:32:40 UTC|
|Launch site||Baikonur, Site 1/5|
|End of mission|
|Decay date||22 August 2001, 09:50 UTC|
|Perigee altitude||270 km|
|Apogee altitude||316 km|
|Epoch||20 May 2001|
|Docking with ISS|
|Docking port||Zvezda aft|
|Docking date||23 May 2001, 00:23:57 UTC|
|Undocking date||22 August 2001, 06:02 UTC|
|Time docked||91 days|
Progress M1-6, identified by NASA as Progress 4P, was a Progress spacecraft used to resupply the International Space Station. It was a Progress-M1 11F615A55 spacecraft, with the serial number 255.
Progress M1-6 was launched on the maiden flight of the Soyuz-FG carrier rocket, flying from Site 1/5 at the Baikonur Cosmodrome. Launch occurred at 22:32:40 UTC on 20 May 2001. The spacecraft docked with the aft port of the Zvezda module at 00:23:57 UTC on 23 May 2001.
It remained docked for 91 days before undocking at 06:02 UTC on 22 August 2001 to make way for Progress M-45. It was deorbited at 09:00 UTC on the same day, burning up in the atmosphere over the Pacific Ocean, with any remaining debris landing in the ocean at around 09:50 UTC.
Progress M1-6 carried supplies to the International Space Station, including food, water and oxygen for the crew and equipment for conducting scientific research.