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 typeBioscience
OperatorInstitute of Biomedical Problems / NASA
COSPAR ID1979-083A
SATCAT no.11536
Mission duration18.5 days
Spacecraft properties
Spacecraft typeBion
Launch mass6,000 kilograms (13,000 lb)
Start of mission
Launch date29 September 1979, 15:30:00 UTC
Launch sitePlesetsk 41/1
End of mission
Landing date14 October 1979, 02:24 UTC
Landing site52°17′N 65°30′E / 52.283°N 65.500°E
near Oktyabr'skoe, Kazakh SSR, USSR
Orbital parameters
Reference systemGeocentric
Perigee210 kilometres (130 mi)
Apogee345 kilometres (214 mi)
Period90.5 minutes
RAAN115.0675 degrees
Argument of perigee115.1822 degrees
Mean anomaly246.0892 degrees
Mean motion15.98830795
Epoch14 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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