CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
2001-0128
SL-12 R/B(AUX MOTOR)
SL-12 R/B(AUX MOTOR) (NORAD 15957) re-entered Earth’s atmosphere on 19 April 2001, after 15 years, 8 months in orbit.
Official date
NORAD number
15957
International designator
1985-070E
Object type
Rocket body
Country
USSR
Launched
8 Aug 1985Baikonur Cosmodrome
Re-entered (UTC)
19 Apr 2001UTC calendar dayAlso recorded as 27 Oct 1986
Time in orbit
15 years, 8 months5,733 days
How it ended
Re-entered (natural decay)
Latitude range
46.6°N to 46.6°SFinal inclination 46.6°
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 46.6°, allowed a re-entry anywhere between 46.6°N and 46.6°S.
Life in orbit
15 years, 8 monthsSL-12 R/B(AUX MOTOR)’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 19 Apr 2001
1 entryFrom the same launch
1985-070
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/2001-0128
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/2001-0128
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.