Engineering:Progress MS-25

Short description: 2023 Russian resupply spaceflight to the ISS

Progress MS-25

Progress MS-25 during final approach to the ISS
Names	Progress 86P
Mission type	ISS resupply
Operator	Roscosmos
COSPAR ID	2023-184A
SATCAT no.	58460
Mission duration	238 days, 3 hours and 12 minutes (in progress)
Spacecraft properties
Spacecraft	Progress MS-25 no.455
Spacecraft type	Progress MS
Manufacturer	Energia
Launch mass	7000 kg
Start of mission
Launch date	1 December 2023, 09:25 UTC
Rocket	Soyuz-2.1a
Launch site	Baikonur, Site 31
Contractor	Progress Rocket Space Centre
End of mission
Disposal	Deorbited (planned)
Decay date	2024 (planned)
Orbital parameters
Reference system	Geocentric orbit
Regime	Low Earth orbit
Inclination	51.65°
Docking with ISS
Docking port	Prichal nadir (intended)
Docking with ISS
Docking port	Poisk zenith
Docking date	3 December 2023, 11:18 UTC
Time docked	236 days, 1 hour and 19 minutes (in progress)
Progress ISS Resupply

Progress MS-25 (Russian: Прогресс МC-25), Russian production No.455, identified by NASA as Progress 86P, is a Progress spaceflight launched by Roscosmos to resupply the International Space Station (ISS). It is the 178th flight of a Progress spacecraft.

History

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:

• New external compartment that enables it to deploy satellites. Each compartment can hold up to four launch containers. First time installed on Progress MS-03.
• Enhanced redundancy thanks to the addition of a backup system of electrical motors for the docking and sealing mechanism.
• Improved Micrometeoroid (MMOD) protection with additional panels in the cargo compartment.
• Luch Russian relay satellites link capabilities enable telemetry and control even when not in direct view of ground radio stations.
• GNSS autonomous navigation enables real time determination of the status vector and orbital parameters dispensing with the need of ground station orbit determination.
• Real time relative navigation thanks to direct radio data exchange capabilities with the space station.
• New digital radio that enables enhanced TV camera view for the docking operations.
• Unified Command Telemetry System (UCTS) replaces previous Ukraine Chezara Kvant-V as the Progress spacecraft's on-board radio and antenna/feeder system.
• Replacement of the Kurs A with Kurs NA digital system.

Launch

A Soyuz-2.1a launched Progress MS-25 to the International Space Station from Baikonur Site 31 on 1 December 2023. Around 2 days after the launch, Progress MS-25 will automatically docked with Poisk and continue its mission, supporting Expedition 70 aboard the ISS.

Cargo

The MS-25 cargo capacity is 2,528 kg (5,573 lb) as follows:

• Dry cargo: 1,500 kg (3,300 lb)
• Fuel: 515 kg (1,135 lb)
• Oxygen: 40 kg (88 lb)
• Water: 420 kg (930 lb)

See also

• Uncrewed spaceflights to the International Space Station