International Flight n°: 50 |
Earth orbit Flight n°: 48 |
USSR launch Flight n°: 20 |
Launch, orbit & landing data:
| Designation | 06982 / 73103A |
| Launch date - time | 18 Dec 1973 - 11:55 UT |
| Launch site | Baikonur, LC1 |
| Launch vehicle |
Soyuz 11A511 |
| OKB name - S/N° | Soyuz 7K-T s/n 33A |
| Basic shape | Sphere-cylinder + 2 wings |
| Dimension (m) | 7.5 long, 2.2 dia |
| Mass (kg) | 6560 |
| Flight Crew | Klimuk, Pyotr I. (CDR)
Lebedev, Valentin V. (FE) |
| Call Sign | Kavkaz (Caucasus M.) |
| Backup crew | Vorobyov L., Yazdovski V. |
| Earth orbit on Dec 18.6: |
| - Perigee / Apogee | 188 x 247 km |
| - Eccentricity | 0.004 |
| - Inclination | 51.57° |
| - Period | 88.80 min |
| Landing date - time | 26 Dec 1973 - 08:50:35 UT |
| Landing location | 49°N, 71°E
200km SW of Karaganda |
| Flight Duration (d:u:min) | 7:20:55:35 (7.87 days) |
| Nbr orbits | 127 |
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Flight Crew
| Nr. |
Surname |
Given name |
Job |
Duration |
Orbits |
| 1 |
Klimuk |
Pyotr Iliyich |
Commander |
7d 20h 56m |
127 |
| 2 |
Lebedev |
Valentin Vitaliyevich |
Flight engineer |
7d 20h 56m |
127 |
Flight
Testflight of Soyuz spacecraft; biological explorations in view
of later planned long-termed missions; the recovery of the capsule was
problematic because of a snowstorm.
A unique flight of the 7K-T/AF modification of the Soyuz spacecraft. The main experiment carried was the "Orion 2" astrophysical observatory ("Orion 1" was carried aboard Salyut 1), the observatory obtained spectrograms of over 3000 stars, some as faint as the eleventh magnitude. The crew conducted astrophysical observations of stars in the ultraviolet range. Additional experiments included spectrozonal photography of specific areas of the earth's surface, and continued testing of space craft's on-board systems. Recovered December 26, 1973 8:50 GMT. Landed in snowstorm 200 km SW Karaganda.
After the Soyuz 11 disaster, the Soyuz underwent redesign for increased reliability. Two solo test flights of the new design were planned. The second mission would include installation of a large astrophyscial camera. Crews for the second mission, Soyuz-13, were first named in July 1973: Vorobyev/Yazdovskiy (Prime); Klimuk/Sevastyanov (Backup); Kovalenok/Ponomarev (Support). These assignments were changed a month later to: Vorobyev/Yazdovskiy(Prime); Klimuk/Ponomarev (Backup); Kovalenok/Sevastyanov (Support). They were again revised in September 1973 to Vorobyev/Yazdovskiy (Prime); Klimuk/Lebedev (Backup); Kovalenok/Ponomarev (Support). But just before launch Klimuk/Lebedev were named as the prime crew.
Maneuver Summary: 189km X 247km orbit to 186km X 255km orbit. Delta V: 2 m/s
186km X 255km orbit to 223km X 256km orbit. Delta V: 10 m/s
Total Delta V: 12 m/s.
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Ref.: #1,#2, #3(SD71), #7, #8, #16, #125, #206 - update: 28.07.07
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