CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1989-0624
SL-12 R/B(AUX MOTOR)
SL-12 R/B(AUX MOTOR) (NORAD 18636) re-entered Earth’s atmosphere on 5 July 1989, after 1 year, 6 months in orbit.
Official date
NORAD number
18636
International designator
1987-100F
Object type
Rocket body
Country
USSR
Launched
10 Dec 1987Baikonur Cosmodrome
Re-entered (UTC)
5 Jul 1989UTC calendar dayAlso recorded as 5 Jul 1990
Time in orbit
1 year, 6 months573 days
How it ended
Re-entered (natural decay)
Latitude range
—
Mass
120 kg
Where it came down
Not on recordNo position was recorded for this re-entry. Its final orbit is not on record.
Life in orbit
1 year, 6 monthsSL-12 R/B(AUX MOTOR)’s lowest and highest points above Earth, week by week, from its tracking history.
From the same launch
1987-100
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1989-0624
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1989-0624
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.