Kosmos 1129 / Bion 5
Conception of Bion 5 in orbit
NamesБион 5
Biocosmos 5
Biokosmos 5
Mission typeBioscience
OperatorInstitute of Biomedical Problems
COSPAR ID1979-083A
SATCAT no.11536
Mission duration18.5 days
Spacecraft properties
SpacecraftBion 5
Spacecraft typeBion
Launch mass6,000 kg (13,000 lb)
Start of mission
Launch date29 September 1979,
15:30:00 UTC
RocketSoyuz-U 11A511U (s/n Zh15000-193)
Launch sitePlesetsk, Site 41/1[1]
End of mission
Recovered bySoviet Space Forces
Landing date14 October 1979, 02:24 UTC
Landing site52°17′N 65°30′E / 52.283°N 65.500°E / 52.283; 65.500 (Bion 5 spashdown)
near Oktyabr'skoe, Kazakhstan, Soviet Union
Orbital parameters
Reference systemGeocentric orbit[2]
RegimeLow Earth orbit
Perigee altitude226 km (140 mi)
Apogee altitude406 km (252 mi)
Period90.50 minutes
← Bion 4
Bion 6 →

Bion 5, or also Kosmos 1129 (in Russian: Бион 5, Космос-1129) was a Bion satellite. It was a biomedical research mission involving scientists from nine countries, launched on 29 September 1979, at 15:30:00 UTC. Among the experiments was the first attempt to breed mammals in space, which proved unsuccessful. The mission ended after 18.5 days, on 14 October 1979, at 02:24 UTC. The mission had the cooperation of the Bulgaria, Czechoslovakia, East Germany, France, Hungary, Poland, Romania, the United States and the Soviet Union.


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.

See also


  1. ^ "Bion". Gunter's Space Page. Retrieved 17 January 2021.
  2. ^ "Trajectory: Bion 5 1979-083A". NASA. 14 May 2020. Retrieved 16 January 2021. Public Domain This article incorporates text from this source, which is in the public domain.
  3. ^ NASA Contractor Report 3922(27), USSR Space Life Sciences Digest, Issue 23 17 February 2021 Public Domain This article incorporates text from this source, which is in the public domain.