Progress M1-6

Mission type	International Space Station resupply
Operator	Roskosmos
COSPAR ID	2001-021A
SATCAT no.	26773
Mission duration	95 days
Spacecraft properties
Spacecraft type	Progress-M1 s/n 255
Manufacturer	RKK Energia
Start of mission
Launch date	20 May 2001, 22:32:40 UTC
Rocket	Soyuz-FG
Launch site	Baikonur, Site 1/5
End of mission
Disposal	Deorbited
Decay date	22 August 2001, 09:50 UTC
Orbital parameters
Reference system	Geocentric
Regime	Low Earth
Perigee altitude	270 km
Apogee altitude	316 km
Inclination	51.6°
Period	90.4 minutes
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 ISS Resupply ← Progress M-44 Progress M-45 →

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.^[1]

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.^[1] The spacecraft docked with the aft port of the Zvezda module at 00:23:57 UTC on 23 May 2001.^[2][3]

It remained docked for 91 days before undocking at 06:02 UTC on 22 August 2001^[2] to make way for Progress M-45.^[4] It was deorbited at 09:00 UTC on the same day,^[2] burning up in the atmosphere over the Pacific Ocean, with any remaining debris landing in the ocean at around 09:50 UTC.^[2][5]

Progress M1-6 carried supplies to the International Space Station, including food, water and oxygen for the crew and equipment for conducting scientific research.

• List of Progress flights
• Uncrewed spaceflights to the International Space Station