CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1973-0386
COSMOS 577
COSMOS 577 (NORAD 6745) landed on 7 August 1973, after 13 days in orbit.
Official date
NORAD number
6745
International designator
1973-048A
Object type
Spacecraft
Country
USSR
Launched
25 Jul 1973Plesetsk Cosmodrome
Landed (UTC)
7 Aug 1973UTC calendar day
Time in orbit
13 days13 days
How it ended
Landed
Latitude range
65.4°N to 65.4°SFinal inclination 65.4°
Mass
2,200 kg
Operator
GUKOS RVSN
Built by
TsKBEM Fil. 3
Bus
Zenit-4M
Programme
Zenit-4M
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 65.4°, allowed a re-entry anywhere between 65.4°N and 65.4°S.
Life in orbit
13 daysAlso ended on 7 Aug 1973
4 entriesFrom the same launch
1973-048
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1973-0386
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1973-0386
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.