CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1991-0367
Naduvaniy gazovoy ballon
Balloon subsatellite
Naduvaniy gazovoy ballon (NORAD 21661) re-entered Earth’s atmosphere on 29 August 1991, after 2 months in orbit.
Official dateIdentified from the historical record
NORAD number
21661
International designator
1986-017FJ
Object type
Spacecraft
Official listing
MIR DEBListed as a fragment
Country
USSR
Launched
30 May 1991Baikonur Cosmodrome
Released from
Mir
Re-entered (UTC)
29 Aug 1991UTC calendar day
Time in orbit
2 months91 days
How it ended
Re-entered (natural decay)
Latitude range
51.6°N to 51.6°SFinal inclination 51.6°
Mass
5 kg
Operator
NPO Energiya
Built by
NPO Energiya
Bus
Balloon
Programme
PSUP
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 51.6°, allowed a re-entry anywhere between 51.6°N and 51.6°S.
Life in orbit
2 monthsAlso ended on 29 Aug 1991
2 entriesFrom the same launch
1991-038
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1991-0367
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1991-0367
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.