CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1978-0286
COSMOS 1021
COSMOS 1021 (NORAD 10939) landed on 23 June 1978, after 13 days in orbit.
Official date
NORAD number
10939
International designator
1978-057A
Object type
Spacecraft
Country
USSR
Launched
10 Jun 1978Baikonur Cosmodrome
Landed (UTC)
23 Jun 1978UTC calendar day
Time in orbit
13 days13 days
How it ended
Landed
Latitude range
65.0°N to 65.0°SFinal inclination 65.0°
Mass
2,400 kg
Operator
GUKOS RVSN
Built by
TsSKB
Bus
Zenit-4MK
Programme
Zenit-4MKM
Where it came down
Latitude band its orbit allowedExact position not recorded
No position was recorded for this re-entry. Its final orbit, inclined at 65.0°, allowed a re-entry anywhere between 65.0°N and 65.0°S.
Life in orbit
13 daysFrom the same launch
1978-057
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1978-0286
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1978-0286
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.