Progress M-UM (Russian: Прогресс М-UM), is a specially modified Progress M 11F615A55, Russian production No. 303[5], is planned to be launched by Roscosmos to deliver the Prichal module to the Russian Orbital Segment (ROS) of the International Space Station (ISS). It will be launched along with a Progress M propulsion compartment and has the pressurised cargo module removed to accommodate Prichal. This is will be the 171st flight of a Progress spacecraft.[2][6] It will be the final flight of a Progress M and the first launch of a Progress spacecraft on a Soyuz 2.1b.[7]
Development
On Jan. 15, 2011, RKK Energia announced that its Scientific and Technical Council, NTS, had reviewed and approved the preliminary design of the Node Module and associated hardware, including:
A special version of the Progress cargo ship designated the Progress M-UM spacecraft-module, intended for the delivery of the Node Module to the station;
The space payload section, KGCh, for the Progress M-UM;
The adaptation of the Soyuz rocket for the launch of the Progress M-UM spacecraft-module.[8] It was eventually signed for as completed in 2014 and kept in storage till processing and attachment with prichal was started for launch in 2021.
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. Progress M-UM is similar in design to Progress DC-1 and Progress M-MIM2, but with navigational systems and avionics hardware taken from the Progress MS. It is attached to Prichal Module by means of a newly developed transition compartment.
Launch
A Soyuz 2.1 launch with ST-type fairing
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.[1][2][4] Due to the larger diameter of the Prichal module, the Progress M-UM will be launched in a 4.1m wide ST- type fairing.
Docking
Russia's ISS Progress 78 cargo craft is pictured docked to the Nauka. At its departure, the port will be reconfigured by it for Progress M-UM docking. [a]
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. Progress M-UM will then remain in orbit for 30 days.
Expansion of Russian Orbital Segment
The ISS flight manifest drafted by Roscosmos at the end of summer 2020 set the launch of the UM Prichal module for 6 September 2021, with the docking to Nauka's nadir port two days later.[2] However, on 1 December 2020, the launch of UM Prichal slipped to three and four months after the Nauka. The current planned launch date is 24 November 2021.[1]
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.[1]
A spacewalk is planned after Prichal's arrival at the station, with a second spacewalk planned for early fourth quarter of 2021. Six additional spacewalks will follow through 2022 to complete the integration of the Nauka and Prichal modules into the Russian Orbital Segment.[1]
The Poisk module was delivered to ISS in 2009 by a modified Progress-M 11F615A55 spacecraft called Progress M-MIM2, with the pressurised cargo module removed to accommodate Poisk. The Pirs module was delivered in 2001 by a similar modified Progress-M called Progress M-SO1 spacecraft.
Undocking and decay
The Progress M-UM propulsion section is planned to remain docked at the station for 26 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.[6] A contingency spacewalk to perform a backup separation of the spacecraft from Prichal should the automated release mechanisms fail.
^Prichal, though is the second module after Rassvet to use a port initially used by soyuz or Progress spacecrafts, it is not able to dock to SSVP ports like Rassvet module. The port had the temporary docking adapter before the SSVP-M or "Hybrid" standard, consisting consists of the traditional SSVP probe‑and‑drogue soft-dock mechanism and an APAS-95 hard-dock collar before Progress M-UM arrival
Launches are separated by dots ( • ), payloads by commas ( , ), multiple names for the same satellite by slashes ( / ). Cubesats are smaller. Crewed flights are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses).
Prichal module / Progress M-UM launch mission logo
