|Mission type||ISS resupply|
|Mission duration||30 days (planned)|
|Spacecraft type||Progress MS|
|Launch mass||7290 kg|
|Start of mission|
|Launch date||24 November 2021 (planned) |
|Launch site||Baikonur, Site 31|
|Contractor||Progress Rocket Space Centre|
|End of mission|
|Reference system||Geocentric orbit|
|Regime||Low Earth orbit|
|Docking with ISS|
|Docking port||Nauka nadir|
Progress M-UM (Russian: Прогресс М-UM), is a specially modified Progress MS spacecraft launched by Roscosmos to deliver the Prichal module to the Russian Orbital Segment (ROS) of the International Space Station (ISS). This will be the 171st flight of a Progress spacecraft.
A Soyuz-2.1b will launch Progress M-UM to the International Space Station from Baikonur Site 31/6 on 24 November 2021 for delivery of the Prichal module. Two days after launch, Progress M-UM will automatically dock Prichal to the re-configured nadir or Earth-facing port of the Nauka module after removal of the module's nadir docking adapter by Progress MS-17 and remain in orbit for 30 days.
The ISS flight manifest drafted by Roscosmos at the end of summer 2020, set the launch of UM Prichal module for September 6, 2021, with the docking to Nauka's nadir port two days later. However, on 1 December 2020, the launch of UM Prichal slipped to three and four months after the Nauka. Current planned launch date is 24 November 2021.
One port on Prichal is equipped with an active hybrid docking port, which enables docking with the Nauka/MLM module. The remaining five ports are passive hybrids, enabling docking of Soyuz and Progress vehicles, as well as heavier modules and future spacecraft with modified docking systems.
A spacewalk is planned after the arrival Prichal at the station, with a second spacewalk planned for early fourth quarter of 2021. Six additional spacewalks will follow thru 2022 to complete the integration of the Nauka and Prichal modules into the Russian Orbital Segment.
The Prichal module will become the second addition to the Russian Orbital Segment in 2021. Earlier modules were delivered and added to the Russian Orbital Segment in a similar manner. The Poisk module was delivered to ISS in 2009 by a modified Progress-M 11F615A55 spacecraft, with the pressurised cargo module removed to accommodate Poisk. The Pirs module was delivered in 2001 by a modified Progress M-SO1 spacecraft.
The Progress M-UM propulsion section is planned to remain docked at the station for 30 days. The Propulsion section will then undock, revealing Prichal's nadir docking port for future Russian spacecraft. The Propulsion section will re-enter the Earth's atmosphere for destruction over the South Pacific Ocean.