CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1972-0176
SL-6 R/B(2)
SL-6 R/B(2) (NORAD 4570) re-entered Earth’s atmosphere on 31 May 1972, after 1 year, 8 months in orbit.
Official date
NORAD number
4570
International designator
1970-077D
Object type
Rocket body
Country
USSR
Launched
29 Sep 1970Plesetsk Cosmodrome
Re-entered (UTC)
31 May 1972UTC calendar day
Time in orbit
1 year, 8 months610 days
How it ended
Re-entered (natural decay)
Latitude range
66.0°N to 66.0°SFinal inclination 66.0°
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 66.0°, allowed a re-entry anywhere between 66.0°N and 66.0°S.
Life in orbit
1 year, 8 monthsSL-6 R/B(2)’s lowest and highest points above Earth, week by week, from its tracking history.
From the same launch
1970-077
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1972-0176
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1972-0176
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.