Soyuz MS-25

Soyuz MS-25

Soyuz MS-25 rolled out to Pad 31/6
Names	ISS 71S
Mission type	Crewed mission to ISS
Operator	Roscosmos
COSPAR ID	2024-055A
SATCAT no.	59294
Website	en.roscosmos.ru
Mission duration	28 days, 23 hours and 27 minutes (in progress)
Spacecraft properties
Spacecraft	Soyuz MS No.756
Spacecraft type	Soyuz MS
Manufacturer	RSC Energia
Crew
Crew size	3
Members	Tracy Caldwell-Dyson
Launching	Oleg Novitsky Maryna Vasileuskaya
Landing	Oleg Kononenko Nikolai Chub
Callsign	Kazbek
Start of mission
Launch date	23 March 2024, 12:36 UTC[1]
Rocket	Soyuz-2.1a
Launch site	Baikonur Cosmodrome, Site 31
Contractor	Progress Rocket Space Centre
End of mission
Landing date	24 September 2024 (planned)
Landing site	Kazakh Steppe, Kazakhstan
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, 15:03 UTC
Time docked	26 days and 21 hours (in progress)
(L-R) Dyson, Novitsky, Vasileuskaya Soyuz programme (crewed) ← Soyuz MS-24 Soyuz MS-26 →

Soyuz MS-25 is an ongoing Russian crewed Soyuz spaceflight from Baikonur Cosmodrome to the International Space Station.^[2][3]

Crew

This is the first launch of two women, Tracy Caldwell-Dyson from US and Maryna Vasileuskaya from Belarus, aboard a Soyuz spacecraft. The mission commander is Russian cosmonaut Oleg Novitsky, born in Chervyen, Minsk Voblast, Byelorussian SSR, USSR (now Belarus).

Primary Crew

Position	Launching Crew member	Landing Crew member
Commander	Oleg Novitsky, Roscosmos Visiting Fourth spaceflight	Oleg Kononenko, Roscosmos Expedition 69/70/71 Fifth spaceflight
Spaceflight Participant/ Flight Engineer	Maryna Vasileuskaya[4], Belarus Space Agency Visiting First spaceflight	Nikolai Chub, Roscosmos Expedition 69/70/71 First spaceflight
Flight Engineer	Tracy Caldwell-Dyson, NASA Expedition 70/71 Third spaceflight

Backup crew

Position	Crew member
Commander	Ivan Vagner, Roscosmos
Spaceflight participant	Anastasia Lenkova, Belarus Space Agency
Flight Engineer	Donald Pettit, NASA

Flight

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.^[5] The second launch attempt on 23 March 2024 was successful.

Dyson will spend approximately six months aboard the International Space Station. Roscosmos cosmonaut Oleg Novitsky and spaceflight participant Maryna Vasileuskaya of Belarus spent approximately 13 days aboard the orbital complex as a part of 21st ISS visiting expedition.^[6]

Undocking and Return

After completing her expedition, Dyson will return to Earth on 24 September 2024 with Roscosmos cosmonauts Oleg Kononenko and Nikolai Chub on the Soyuz MS-25 spacecraft. Kononenko and Chub have been on the ISS since September 2023. They arrived with NASA astronaut Loral O'Hara on the Soyuz MS-24 spacecraft. Kononenko and Chub will remain aboard the orbital laboratory for about one year. If the mission lasts 300–365 days, Kononenko will become the first person to stay 1,000 days in space and have spent a total of 1,036–1,101 days in space. He exceeded the previous record of 878 days by Gennady Padalka on 4 February 2024. O'Hara, who spent six months aboard the space station, returned with Novitsky and Vasileuskaya on the Soyuz MS-24 spacecraft.^[6][7]

References

 This article incorporates public domain material from