Soyuz MS-28

{{Short description|Planned 2025 Russian crewed spaceflight to the ISS}}

{{refimprove|date=October 2024}}

{{Use dmy dates|date=March 2024}}

{{Infobox spaceflight

| name = Soyuz MS-28

| image =

| image_caption =

| names_list = ISS 74S

| mission_type = ISS crew transport

| operator = Roscosmos

| COSPAR_ID =

| SATCAT =

| website = {{URL|en.roscosmos.ru}}

| mission_duration = 240 days (planned)

| spacecraft = Soyuz MS-28 No. 759

| spacecraft_type = Soyuz MS

| manufacturer = Energia

| launch_mass =

| landing_mass =

| launch_date = {{Abbr|NET|no earlier than}} 27 November 2025{{Cite web |date=19 December 2024 |title=Upcoming ISS Expeditions |url=http://spacefacts.de/schedule/e_iss.htm |access-date=16 January 2025 |website=spacefacts.de}}

| launch_rocket = Soyuz-2.1a

| launch_site = Baikonur, Site 31/6

| launch_contractor = RKTs Progress

| landing_date = 15 June 2026 (planned)

| landing_site = Kazakh Steppe, Kazakhstan

| crew_size = 3

| crew_members = {{Unbulleted list

| Sergey Kud-Sverchkov

| Sergey Mikayev

| Christopher Williams

}}

| crew_launching =

| crew_landing =

| crew_callsign = Favor 2{{Cite web |title=Центр подготовки космонавтов им. Ю.А.Гагарина. Официальный Web-сайт |trans-title=Cosmonauts' call signs |url=https://www.gctc.ru/main.php?id=156 |access-date=21 January 2025 |website=Yuri Gagarin Cosmonaut Training Center |language=ru}}

| orbit_reference = Geocentric orbit

| orbit_regime = Low Earth orbit

| orbit_inclination = 51.66°

| apsis = gee

| docking = {{Infobox spaceflight/Dock

| docking_target = ISS

| docking_type = dock

| docking_port = Rassvet nadir

| docking_date = November 2025 (planned)

| undocking_date = June 2026 (planned)

| time_docked =

}}

| insignia =

| insignia_caption =

| programme = Soyuz programme

| previous_mission = Soyuz MS-27

| next_mission = Soyuz MS-29

}}

Soyuz MS-28, Russian production No. 759 and identified by NASA as Soyuz 74S, is a planned Russian crewed Soyuz spaceflight to launch from Site 31/6 at the Baikonur Cosmodrome no earlier than 27 November 2025 to the International Space Station.

The mission was slated to be the first to launch after the termination of a NASA/Roscosmos barter agreement, where one Russian cosmonaut flies on a NASA spacecraft in exchange for one NASA astronaut flying on a Soyuz. Consequently, {{As of|2024|lc=y}}, this mission was scheduled to transport three Russian cosmonauts. However, NASA and Roscosmos were negotiating to extend their seat exchange program beyond 2025,{{Cite report |url=https://oig.nasa.gov/wp-content/uploads/2024/09/ig-24-020.pdf |title=NASA's Management of Risks to Sustaining ISS Operations through 2030 |date=26 September 2024 |publisher=NASA Office of Inspector General |page=14 |access-date=2 October 2024}} and in April 2025, NASA announced that Christopher Williams had been assigned to the crew.{{Cite web|url=https://www.nasa.gov/news-release/nasa-astronaut-chris-williams-assigned-to-first-space-station-mission/ |title=NASA Astronaut Chris Williams Assigned to First Space Station Mission - NASA }}