Soyuz 25

Launch Success

Liftoff Time (GMT)

02:40:35

Sunday October 9, 1977

Mission Details

Launch Notes

The cosmonauts named the spacecraft Фотон ("Foton").

Soyuz 25

Wiki

Soyuz 25 was a 1977 Soviet crewed space flight, the first to the new Salyut 6 space station, which had been launched 10 days earlier. However, the mission was aborted when cosmonauts Vladimir Kovalyonok and Valery Ryumin failed to engage the docking latches of the station despite five attempts. Lacking sufficient fuel to attempt a dock at the other end of the station and with battery power for only two days, they returned to Earth. The failure led to a new rule whereby every crew had to have at least one person aboard who had previously flown in space. This is Soyuz's 41th flight, and 24th crewed flight. The Soyuz is a Soviet crewed spaceship, developed to made manned lunar missions. This version called 7K will fly 4 times on the giant launcher N1, and several tens of times on Proton to fly over the Moon, which will be successful during the mission Zond 4. Soyuz will become the first spacecraft to transport living beings to the Moon during the flight of Zond 5, with two turtles. Subsequently, it is adapted to low orbit and will fly on the Soyuz launcher to serve the Salyut and Mir stations and the ISS.

Low Earth Orbit

1 Payload

6,860 kilograms

Rocket

Retired
Soyuz U

Active 1973 to 2017

RKK Energiya logo

Manufacturer

RKK Energiya

Price

$20.00 million

Rocket

Height: 51.32m

Payload to Orbit

LEO: 6,860 kg

GTO: 0 kg

Liftoff Thrust

4,456 Kilonewtons

Fairing

Diameter: 3m

Height: 15.59m

Stages

3

Strap-ons

4

Launch Site

Site 1/5

Baikonur Cosmodrome, Kazakhstan

Fastest Turnaround

23 hr 32 min

Stats

Soyuz U


80th

Mission

33rd

Mission of 1977

RKK Energiya


1171st

Mission

82nd

Mission of 1977

1977


104th

Orbital launch attempt