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Progress 7

A Progress 7K-TG spacecraft
Mission type	Salyut 6 resupply
COSPAR ID	1979-059A
SATCAT no.	11421
Spacecraft properties
Spacecraft	Progress (No.107)
Spacecraft type	Progress 7K-TG
Manufacturer	NPO Energia
Start of mission
Launch date	28 June 1979, 09:25:11 UTC
Rocket	Soyuz-U
Launch site	Baikonur, Site 31/6
End of mission
Disposal	Deorbited
Decay date	20 July 1979, 01:57:30 UTC
Orbital parameters
Reference system	Geocentric
Regime	Low Earth
Perigee altitude	186 km
Apogee altitude	251 km
Inclination	51.6°
Period	88.8 minutes
Epoch	28 June 1979
Docking with Salyut 6
Docking port	Aft
Docking date	30 June 1979, 11:18:32 UTC
Undocking date	18 July 1979, 03:49:55 UTC
Progress (spacecraft)← Progress 6Progress 8 →

Progress 7 (Russian: Прогресс 7) was a Soviet unmanned Progress cargo spacecraft, which was launched in June 1979 to resupply the Salyut 6 space station.

Spacecraft

Progress 7 was a Progress 7K-TG spacecraft. The seventh of forty three to be launched, it had the serial number 107. The Progress 7K-TG spacecraft was the first generation Progress, derived from the Soyuz 7K-T and intended for uncrewed logistics missions to space stations in support of the Salyut programme. On some missions the spacecraft were also used to adjust the orbit of the space station.

The Progress spacecraft had a dry mass of 6,520 kilograms (14,370 lb), which increased to around 7,020 kilograms (15,480 lb) when fully fuelled. It measured 7.48 metres (24.5 ft) in length, and 2.72 metres (8 ft 11 in) in diameter. Each spacecraft could accommodate up to 2,500 kilograms (5,500 lb) of payload, consisting of dry cargo and propellant. The spacecraft were powered by chemical batteries, and could operate in free flight for up to three days, remaining docked to the station for up to thirty.

Launch

Progress 7 launched on 28 June 1979 from the Baikonur Cosmodrome in the Kazakh SSR. It used a Soyuz-U rocket.

Docking

Progress 7 docked with the aft port of Salyut 6 on 30 June 1979 at 11:18:32 UTC, and was undocked on 18 July 1979 at 03:49:55 UTC.

Decay

It remained in orbit until 20 July 1979, when it was deorbited. The deorbit burn occurred at 01:57:30 UTC and the mission ended at 02:40 UTC.

See also

• 1979 in spaceflight
• List of Progress missions
• List of uncrewed spaceflights to Salyut space stations

References

1. ^ "Launchlog". Jonathan's Space Report. Retrieved 4 December 2020.
2. ^ "Progress 1 - 42 (11F615A15, 7K-TG)". Gunter's Space Page. Retrieved 4 December 2020.
3. ^ "Cargo spacecraft "Progress 7"". Manned Astronautics figures and facts. Archived from the original on 9 April 2008.
4. Krebs, Gunter. "Progress 1 - 42 (11F615A15, 7K-TG)". Gunter's Space Page. Retrieved 26 November 2010.
5. McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 26 November 2010.
6. ^ Hall, Rex D.; Shayler, David J. (2003). Soyuz: A Universal Spacecraft. Springer-Praxis. pp. 239–250. ISBN 1-85233-657-9.
7. "Progress 7". NASA. Retrieved 4 December 2020. This article incorporates text from this source, which is in the public domain.
8. ^ "Salyut 6". Astronautix. Archived from the original on 10 December 2016. Retrieved 4 December 2020.

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