Kosmos 28
Mission typeOptical imaging reconnaissance
COSPAR ID1964-017A Edit this at Wikidata
SATCAT no.00779
Mission duration8 days
Spacecraft properties
Spacecraft typeZenit-2
Launch mass4730 kg[1]
Start of mission
Launch date4 April 1964, 09:36:00 GMT
RocketVostok-2 s/n G15001-04
Launch siteBaikonur, 31/6
End of mission
Landing date12 April 1964
Orbital parameters
Reference systemGeocentric[2]
RegimeLow Earth
Perigee altitude213 km
Apogee altitude373 km
Period90.4 minutes
Epoch4 April 1964

Kosmos 28 (Russian: Космос 28 meaning Cosmos 28) or Zenit-2 No.16 was a Soviet, a first generation, low resolution, optical film-return reconnaissance satellite which was launched in 1964. A Zenit-2 spacecraft, Kosmos 28 was the sixteenth of eighty-one such satellites to be launched[3][4] and had a mass of 4,730 kilograms (10,430 lb).

A Vostok-2 rocket, s/n G15001-04,[5] was used to launch Kosmos 28. The launch took place at 09:36 GMT on 4 April 1964 from Site 31/6 at the Baikonur Cosmodrome.[6] Following its successful arrival in orbit the spacecraft received its Kosmos designation, along with the International Designator 1964-017A and the Satellite Catalog Number 00779.

Kosmos 28 was operated in a low Earth orbit. On 4 April 1964, it had a perigee of 213 kilometres (132 mi), an apogee of 373 kilometres (232 mi), with inclination of 65.0° and an orbital period of 90.4 minutes. On 12 April 1964, the spacecraft was deorbited, with its return capsule descending by parachute for recovery by Soviet forces.[7][4]


  1. ^ https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1964-017A - 27 February 2020
  2. ^ https://nssdc.gsfc.nasa.gov/nmc/spacecraft/displayTrajectory.action?id=1964-017A - 27 February 2020
  3. ^ Krebs, Gunter. "Zenit-2 (11F61)". Gunter's Space Page. Archived from the original on 31 December 2011. Retrieved 15 December 2013.
  4. ^ a b Wade, Mark. "Zenit-2". Encyclopedia Astronautica. Archived from the original on 21 April 2012. Retrieved 15 December 2013.
  5. ^ Wade, Mark. "Vostok 8A92". Encyclopedia Astronautica. Archived from the original on 22 August 2016. Retrieved 13 December 2013.
  6. ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 15 December 2013.
  7. ^ McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 15 December 2013.