Soyuz MS-25
2024 Russian crewed spaceflight to the ISS
From Wikipedia, the free encyclopedia
Soyuz MS-25, Russian production No. 756 and identified by NASA as Soyuz 71S, was a Russian crewed Soyuz spaceflight from Baikonur Cosmodrome to the International Space Station.[5][6]
Soyuz MS-25 illuminated by an aurora | |
| Names | ISS 71S |
|---|---|
| Mission type | ISS crew transport |
| Operator | Roscosmos |
| COSPAR ID | 2024-055A |
| SATCAT no. | 59294 |
| Mission duration | 183 days, 23 hours, 22 minutes and 54 seconds |
| Distance travelled | 126,000,000 km (78,000,000 mi)[1] |
| Orbits completed | 2,944[1] |
| Spacecraft properties | |
| Spacecraft | Soyuz MS-25 No. 756[2] |
| Spacecraft type | Soyuz MS |
| Manufacturer | Energia |
| Launch mass | 7,152 kg (15,767 lb)[2] |
| Crew | |
| Crew size | 3 |
| Members | Tracy Caldwell Dyson |
| Launching | |
| Landing | |
| Callsign | Kazbek |
| Start of mission | |
| Launch date | 23 March 2024, 12:36:10 UTC[3] |
| Rocket | Soyuz-2.1a No. 15000-066[2] |
| Launch site | Baikonur, Site 31/6 |
| Contractor | RKTs Progress |
| End of mission | |
| Landing date | 23 September 2024, 11:59:04 UTC[4] |
| Landing site | Kazakh Steppe, Kazakhstan (47°21′00″N 69°38′00″E)[4] |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Low Earth orbit |
| Inclination | 51.66° |
| Docking with ISS | |
| Docking port | Prichal nadir |
| Docking date | 25 March 2024, 15:02:51 UTC[2] |
| Undocking date | 23 September 2024, 08:36:30 UTC[4] |
| Time docked | 181 days, 17 hours, 33 minutes and 39 seconds |
  Mission patches: launch (left) and landing (right) .jpg)  Top: launching crew, from left: Dyson, Novitsky, and Vasileuskaya Bottom: landing crew, from left: Kononenko, Chub, and Dyson | |
Crew
MS-25 saw was the first launch of two women, Tracy Caldwell-Dyson from the United States and Maryna Vasileuskaya from Belarus,[7] aboard a Soyuz spacecraft. MS-25 also saw the launch of two people from Belarus, as the mission commander, Oleg Novitsky was born in Chervyen, when it was part of the Byelorussian Soviet Socialist Republic.
| Position | Launching crew member | Landing crew member |
|---|---|---|
| Commander | Oleg Novitsky, Roscosmos 21st Visiting Expedition Fourth and last spaceflight |
Oleg Kononenko, Roscosmos Expedition 69/70/71 Fifth spaceflight |
| Spaceflight participant/Flight engineer | Maryna Vasileuskaya, Belarus Space Agency 21st Visiting Expedition First spaceflight |
Nikolai Chub, Roscosmos Expedition 69/70/71 First spaceflight |
| Flight engineer | Tracy Caldwell-Dyson, NASA Expedition 70/71 Third spaceflight | |
| Position | Crew | |
|---|---|---|
| Commander | Ivan Vagner, Roscosmos | |
| Spaceflight participant | Anastasia Lenkova, Belarus Space Agency | |
| Flight engineer | Donald Pettit, NASA | |
Flight
.jpg)
It was originally scheduled for launch on 21 March 2024, but due to a voltage drop in one of the power generators, the launch was aborted.[8] The second launch attempt on 23 March 2024 was successful.
Caldwell-Dyson spent approximately six months aboard the International Space Station. Novitsky and Vasileuskaya of Belarus spent approximately 13 days aboard the orbital complex as a part of 21st ISS visiting expedition before returning aboard Soyuz MS-24.[9]
Undocking and Return
At the end of Expedition 71, Caldwell-Dyson returned to Earth on Soyuz MS-25 with Roscosmos cosmonauts Oleg Kononenko and Nikolai Chub on 23 September 2024. They arrived with NASA astronaut Loral O'Hara on Soyuz MS-24 on 15 September 2023. O'Hara returned to Earth on MS-24 with Novitsky and Vasileuskaya.[9][10] Kononenko and Chub remained aboard the orbital laboratory for a year. As the mission lasted 374 days, Kononenko spent a total of 1,111 days in space by the time he returned to Earth. He broke the world record of 878 days in space held by Gennady Padalka on February 4, 2024 at 07:30:08 UTC. He later became the first person to stay 900, 1,000, and 1,100 days in space on 25 February 2024, 4 June 2024, and 12 September 2024 respectively.[11]
