CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1981-0305
SL-8 R/B
SL-8 R/B (NORAD 11151) re-entered Earth’s atmosphere on 20 June 1981, after 2 years, 6 months in orbit.
Official date
NORAD number
11151
International designator
1978-115B
Object type
Rocket body
Country
USSR
Launched
15 Dec 1978Plesetsk Cosmodrome
Re-entered (UTC)
20 Jun 1981UTC calendar day
Time in orbit
2 years, 6 months918 days
How it ended
Re-entered (natural decay)
Latitude range
74.0°N to 74.0°SFinal inclination 74.0°
Mass
1,434 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 74.0°, allowed a re-entry anywhere between 74.0°N and 74.0°S.
Life in orbit
2 years, 6 monthsSL-8 R/B’s lowest and highest points above Earth, week by week, from its tracking history.
Came down with SL-8 R/B
4 entriesFrom the same launch
1978-115
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1981-0305
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1981-0305
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.