CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1976-0055
SL-6 R/B(2)
SL-6 R/B(2) (NORAD 4431) re-entered Earth’s atmosphere on 2 March 1976, after 5 years, 8 months in orbit.
Official date
NORAD number
4431
International designator
1970-049D
Object type
Rocket body
Country
USSR
Launched
26 Jun 1970Plesetsk Cosmodrome
Re-entered (UTC)
2 Mar 1976UTC calendar day
Time in orbit
5 years, 8 months2,076 days
How it ended
Re-entered (natural decay)
Latitude range
64.6°N to 64.6°SFinal inclination 64.6°
Mass
4,500 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 64.6°, allowed a re-entry anywhere between 64.6°N and 64.6°S.
Life in orbit
5 years, 8 monthsSL-6 R/B(2)’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 2 Mar 1976
1 entryFrom the same launch
1970-049
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1976-0055
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1976-0055
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.