Soyuz MS-04

Soyuz MS-04 was a Soyuz spaceflight that launched on 20 April 2017 to the ISS.^[1] It transported two members of the Expedition 52 crew to the International Space Station. Soyuz MS-04 was the 133rd flight of a Soyuz spacecraft. The crew consisted of a Russian commander and an American flight engineer. It was the first of the Soyuz MS series to rendezvous with the Station in approximately 6 hours, instead of the 2 day orbital rendezvous used for the previous launches. It was also the first Soyuz to launch with only 2 crew members since Soyuz TMA-2.

Soyuz MS-04

Soyuz MS-04 prior to launch
Mission type	ISS crew transport
Operator	Roscosmos
COSPAR ID	2017-020A
SATCAT no.	42682
Mission duration	136 days
Distance travelled	92.5 million kilometres
Orbits completed	2176
Spacecraft properties
Spacecraft	Soyuz MS
Spacecraft type	Soyuz MS 11F732A48
Manufacturer	Energia
Launch mass	7080 kg
Crew
Crew size	2 (launching) 3 (landing)
Members	Fyodor Yurchikhin Jack D. Fischer
Landing	Peggy Whitson
Callsign	Olimp (Olympus)
Start of mission
Launch date	20 April 2017, 07:13:44 UTC
Rocket	Soyuz-FG
Launch site	Baikonur, Site 1
Contractor	RKTs Progress
End of mission
Landing date	3 September 2017, 01:22 UTC
Landing site	Steppes of the Kazakhstan
Orbital parameters
Reference system	Geocentric orbit
Regime	Low Earth orbit
Inclination	51.66°
Docking with ISS
Docking port	Poisk zenith
Docking date	20 April 2017, 13:18 UTC
Undocking date	2 September 2017, 21:58 UTC
Time docked	135 days
Yurchikhin and Fischer in front of their spacecraft Soyuz programme (crewed) ← Soyuz MS-03 Soyuz MS-05 →

Crew

Position[2]	Launching Crew Member	Landing Crew Member
Commander	Fyodor Yurchikhin, Roscosmos Expedition 51 Fifth and last spaceflight
Flight Engineer 1	Jack D. Fischer, NASA Expedition 51 Only spaceflight
Flight Engineer 2	N/A	Peggy Whitson, NASA[3] Expedition 50/51/52 Third (last NASA)[4] spaceflight

Backup crew

Position[2]	Crew Member
Commander	Sergey Ryazansky, Roscosmos
Flight Engineer 1	Randolph Bresnik, NASA

Due to a decision to cut down the number of participating Russian astronauts in 2017, only two astronauts were launched on Soyuz MS-04.^[5] Originally set to include 3 people, the crew assignments were changed in November 2016 by NASA and Roscosmos.

Original crew

Position	Crew member
Commander	Alexander Misurkin, Roscosmos Expedition 51 Second spaceflight
Flight Engineer 1	Nikolai Tikhonov, Roscosmos Expedition 51 First spaceflight
Flight Engineer 2	Mark T. Vande Hei, NASA Expedition 51 First spaceflight

Alexander Misurkin and Mark T. Vande Hei were reassigned to Soyuz MS-06 and served as part of Expedition 53/54,^[6] Nikolai Tikhonov was reassigned to Soyuz MS-10 to serve as part of Expedition 57/58 although was also pulled of that mission due to the same budget cuts.^[7]