|Mission type||ISS resupply|
|Mission duration||179 days (planned)|
2 months and 27 days (in progress)
|Spacecraft type||Progress MS|
|Launch mass||7,000 kg (15,000 lb)|
|Payload mass||2,439 kg (5,377 lb)|
|Start of mission|
|Launch date||29 June 2021, 23:27:20 UTC|
|Launch site||Baikonur, Site 31|
|Contractor||Progress Rocket Space Centre|
|End of mission|
|Decay date||24 November 2021|
|Reference system||Geocentric orbit|
|Regime||Low Earth orbit|
|Docking with ISS|
|Docking port||Poisk zenith|
|Docking date||1 July 2021, 00:59 UTC|
86 days (in progress)
|Undocking date||27 October 2021|
|Docking with ISS (Relocation)|
|Docking port||Nauka nadir|
|Docking date||27 October 2021 (planned)|
|Undocking date||24 November 2021|
|Mass||2,439 kg (5,377 lb)|
|Pressurised||1,509 kg (3,327 lb)|
|Fuel||470 kg (1,040 lb)|
|Gaseous||40.5 kg (89 lb)|
|Water||420 kg (930 lb)|
Progress MS-17 (Russian: Прогресс МC-17), Russian production No. 446, identified by NASA as Progress 78P, is a Progress spacecraft launched by Roscosmos to resupply the International Space Station (ISS). This is the 169th flight of a Progress spacecraft.
A Soyuz-2.1a launched the Progress MS-17 to the International Space Station from Baikonur Site 31 on 29 June 2021. Progress MS-17 will automatically dock to Russian Orbital Segment (ROS) of ISS, on 2 July 2021, where it is expected to remain until late 2021.
On 3 February 2021, the State Commission for Testing of the Piloted Space Systems, chaired by Roscosmos head Dmitry Rogozin, approved the latest ISS schedule for 2021 and the first quarter of 2022.
Due to the air leak discovered in the PrK chamber at the aft port of the Zvezda Service Module (SM), Roscosmos moved the docking destination for the Progress MS-17 cargo ship to the Poisk Module, MIM2. After 147 days, Progress MS-17 would be then undock and re-docked to the nadir (Earth-facing) port of the newly arrived Nauka at the end of October 2021.
That move will allow Roscosmos to prepare for the next step in the expansion of the Russian Orbital Segment, this time with the Prichal module. Upon the launch of Prichal (Progress M-UM), currently scheduled for 24 November 2021, the Progress MS-17 will be undocked from Nauka's nadir port, carrying with it a special extension on Nauka's docking mechanism, which was custom-designed for cargo ships and crew vehicles. As a result, the Prichal module with its active hybrid docking port will then be able to dock to the reconfigured port on Nauka on 24 November 2021. This will provide a wider module passageway than was available through the adapter, which will be discarded with Progress MS-17.
If everything goes according to the August 2020 plan, Progress MS-17 will log 179 days in space.
The Progress MS-17 spacecraft is loaded with 2,439 kg (5,377 lb) of cargo, with 1,509 kg (3,327 lb) of this being dry cargo.
The Progress MS-17 is scheduled to remain docked at the station through 24 November 2021, when it will depart with trash and a docking adapter on Nauka nadir port for arrival of Progress M-UM carrying the Prichal module with it, being launched a day after, thereby re-entering the Earth's atmosphere for destruction over the South Pacific Ocean.