CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1978-0075
SL-6 R/B(2)
SL-6 R/B(2) (NORAD 6303) re-entered Earth’s atmosphere on 21 February 1978, after 5 years, 4 months in orbit.
Official date
NORAD number
6303
International designator
1972-075D
Object type
Rocket body
Country
USSR
Launched
30 Sep 1972Plesetsk Cosmodrome
Re-entered (UTC)
21 Feb 1978UTC calendar day
Time in orbit
5 years, 4 months1,970 days
How it ended
Re-entered (natural decay)
Latitude range
64.8°N to 64.8°SFinal inclination 64.8°
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 64.8°, allowed a re-entry anywhere between 64.8°N and 64.8°S.
Life in orbit
5 years, 4 monthsSL-6 R/B(2)’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 21 Feb 1978
1 entryFrom the same launch
1972-075
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1978-0075
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1978-0075
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.