Kosmos 1129

Bion 5, or also Cosmos 1129 (in Russian: Бион 5, Космос-1129) was a Bion satellite launched in 1979. It was a biomedical research mission involving scientists from nine countries. Among the experiments was the first attempt to breed mammals in space, which proved unsuccessful. The mission ended after 18.5 days. The mission had the cooperation of the former Czechoslovakia, East Germany, France, Hungary, Poland, Romania and the United States.

Kosmos 1129 / Bion 5
Conception of Bion 5 in orbit.
Mission type Bioscience
Operator Institute of Biomedical Problems / NASA
COSPAR ID 1979-083A
SATCAT no. 11536
Mission duration 18.5 days
Spacecraft properties
Spacecraft type Bion
Manufacturer TsSKB
Launch mass 6,000 kilograms (13,000 lb)
Start of mission
Launch date 29 September 1979, 15:30:00 UTC
Rocket Soyuz-U
Launch site Plesetsk 41/1
End of mission
Landing date 14 October 1979, 02:24 UTC
Landing site 52°17′N 65°30′E / 52.283°N 65.500°E
near Oktyabr'skoe, Kazakh SSR, USSR
Orbital parameters
Reference system Geocentric
Regime LEO
Eccentricity 0.0100841[1]
Perigee 210 kilometres (130 mi)
Apogee 345 kilometres (214 mi)
Inclination 62.8069º
Period 90.5 minutes
RAAN 115.0675 degrees
Argument of perigee 115.1822 degrees
Mean anomaly 246.0892 degrees
Mean motion 15.98830795
Epoch 14 October 1979, 00:02:58 UTC
Revolution no. 292


Organisms studied included:


Bion 5 mission consisted of various biological studies, including the first mammalian reproduction attempts (rats) in space, which ended up not succeeding. Experiences NASA were designed to study the effects of radiation on mice, quail embryos and some plant specimens.

Studies on the effect of microgravity were also performed on the muscles and bones of rats and avian embryogenesis was studied in space. the effects of microgravity on plant tissues were investigated using carrots and carrot cancerous tissue to study the effects of space flight on the growth and development of plants. As in the previous mission, 30 rats for the species Rattus norvegicus were sent physiological studies; Seven additional rats were used in embryological experiments.


Other Names
Launch Date/Time
1979-09-25 at 15:30:00 UTC
On-orbit Dry Mass
6000 kg

See also


  1. ^ Chris Peat. COSMOS 1129. Heavens Above. Retrieved 2016-06-18.
  2. ^ NASA Contractor Report 3922(27), USSR Space Life Sciences Digest, Issue 23

External links

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