Expedition 51

Expedition 51 was the 51st expedition to the International Space Station, which began upon the departure of Soyuz MS-02 on April 10, 2017 and concluded upon the departure of Soyuz MS-03 on June 2, 2017. Peggy Whitson, Oleg Novitskiy and Thomas Pesquet were transferred from Expedition 50, with Peggy Whitson taking the commander role. She is the first woman to command two expeditions to the ISS, having previously commanded Expedition 16.[1]

ISS Expedition 51
Mission typeISS Expedition
Space StationInternational Space Station
Began10 April 2017 UTC
Ended2 June 2017 UTC
Arrived aboardSoyuz MS-03
Soyuz MS-04
Departed aboardSoyuz MS-03
Soyuz MS-04
Crew size5
MembersExpedition 50/51:
Oleg Novitskiy
Peggy Whitson
Thomas Pesquet
Expedition 51/52:
Fyodor Yurchikhin
Jack Fischer

(l-r) Fischer, Yurchikhin, Pesquet, Whitson, Novitskiy

Due to a decision to cut down the number of participating Russian cosmonauts in 2017, only two cosmonauts were launched on Soyuz MS-04 on April 20, 2017 - bringing the total crew number to five.[2] Transfer of Command from Expedition 51 to Expedition 52 was done on June 1, 2017. Expedition 51 officially ended on June 2, 2017 10:47 UTC, with the undocking of Soyuz MS-03.[3]


Position First Part
(April 2017)
Second Part
(April 2017 to June 2017)
Commander Peggy A. Whitson, NASA
Third and last spaceflight[4]
Flight Engineer 1 Oleg Novitskiy, RSA
Second spaceflight
Flight Engineer 2 Thomas Pesquet, ESA
First spaceflight
Flight Engineer 3 Fyodor Yurchikhin, RSA
Fifth spaceflight
Flight Engineer 4 Jack D. Fischer, NASA
Only spaceflight

Mission overview

Expedition 50/51 launch and docking

Soyuz MS-03 launched on November 17, 2016, transporting Oleg Novitskiy, Peggy Whitson and Thomas Pesquet.[5] MS-03 docked with the Rassvet module on November 19, 2016.


EVA # Spacewalkers Start (UTC) End (UTC) Duration
Expedition 51
Peggy Whitson
Jack D. Fischer
May 12, 2017
May 12, 2017
4 hours 13 minutes
Replaced ExPRESS Carrier Avionics (ExPCA), Installed Pressurized Mating Adapter-3 (PMA-3) Forward Shield, Installed Alpha Magnetic Spectrometer (AMS) MIL-1553 Terminator, Secured Multilayer Insulation (MLI) on Japanese Manipulator System, Relocated a Portable Foot Restrain to PMA-3[6]
EVA 2 Peggy Whitson
Jack D. Fischer
May 23, 2017
May 23, 2017
2 hours 46 minutes
Replace failed Multiplexer-Demultiplexer (MDM), Installed two Wireless Communication Anntenna's[7]

Uncrewed spaceflights to the ISS

Resupply missions that visited the International Space Station during Expedition 51:

- ISS flight number
Country Mission Launcher Launch
Duration (Docked) Deorbit
Cygnus CRS OA-7
- CRS OA-7
 United States Logistics Atlas V 401 18 Apr 2017, 15:11:26 22 Apr 2017, 10:16 4 Jun 2017, 11:05 43d 49m 11 Jun 2017, 17:08


  1. Chiara Palazzo Associated Press. "Nasa veteran Peggy Whitson becomes the oldest woman in space as she blasts off for ISS". Telegraph.co.uk. Retrieved 2016-11-19.
  2. Irene Klotz (16 November 2016). "NASA, Russia Set Flights for Trimmed-Down Space Station Crew". space.com. Retrieved 21 November 2016.
  3. Garcia, Mark (1 June 2017). "Station Changes Command Before Friday Crew Return". NASA. Retrieved 18 June 2017.
  4. "NASA, Space Station Partners Announce Crew Members for Missions in 2017". NASA. 6 August 2015. Retrieved 16 February 2016.
  5. http://russianspaceweb.com/soyuz-ms-03.html
  6. Garcia, Mark (2017-05-12). "200th Station Spacewalk Comes to an End". NASA.gov. Retrieved 2017-05-12.
  7. Garcia, Mark (2017-05-23). "Short Spacewalk Complete After Successful Installation Work". NASA.gov. Retrieved 2017-05-23.

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