CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1991-0177
SL-12 R/B(AUX MOTOR)
SL-12 R/B(AUX MOTOR) (NORAD 17053) re-entered Earth’s atmosphere on 21 April 1991, after 4 years, 5 months in orbit.
Official date
NORAD number
17053
International designator
1986-082E
Object type
Rocket body
Country
USSR
Launched
25 Oct 1986Baikonur Cosmodrome
Re-entered (UTC)
21 Apr 1991UTC calendar day
Time in orbit
4 years, 5 months1,639 days
How it ended
Re-entered (natural decay)
Latitude range
46.4°N to 46.4°SFinal inclination 46.4°
Mass
120 kg
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 46.4°, allowed a re-entry anywhere between 46.4°N and 46.4°S.
Life in orbit
4 years, 5 monthsSL-12 R/B(AUX MOTOR)’s lowest and highest points above Earth, week by week, from its tracking history.
From the same launch
1986-082
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1991-0177
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1991-0177
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.