CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Orbital Register seal
Entry no.
1977-0400

SL-12 R/B(1)

SL-12 R/B(1) (NORAD 10366) re-entered Earth’s atmosphere on 21 September 1977, after 1 day in orbit.

Official date
NORAD number
10366
International designator
1977-092B
Object type
Rocket body
Country
USSR
Launched
20 Sep 1977Baikonur Cosmodrome
Re-entered (UTC)
21 Sep 1977UTC calendar day
Time in orbit
1 day1 days
How it ended
Re-entered (natural decay)
Latitude range
51.4°N to 51.4°SFinal inclination 51.4°
Mass
4,185 kg

Where it came down

Latitude band its orbit allowed
Exact position not recorded

No position was recorded for this re-entry. Its final orbit, inclined at 51.4°, allowed a re-entry anywhere between 51.4°N and 51.4°S.

Life in orbit

1 day

Also ended on 21 Sep 1977

3 entries
1977-0399SL-4 R/B1977-0398SL-4 DEB1977-0401SL-12 PLAT

From the same launch

1977-092
1978-0200SL-12 R/B(AUX MOTOR)1978-0271SL-12 R/B(AUX MOTOR)
Orbital Register seal
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1977-0400
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.