CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1971-0139
SL-6 R/B(2)
SL-6 R/B(2) (NORAD 4049) re-entered Earth’s atmosphere on 10 June 1971, after 1 year, 10 months in orbit.
Official date
NORAD number
4049
International designator
1969-061D
Object type
Rocket body
Country
USSR
Launched
22 Jul 1969Baikonur Cosmodrome
Re-entered (UTC)
10 Jun 1971UTC calendar day
Time in orbit
1 year, 10 months688 days
How it ended
Re-entered (natural decay)
Latitude range
—
Mass
4,500 kg
Where it came down
Not on recordNo position was recorded for this re-entry. Its final orbit is not on record.
Life in orbit
1 year, 10 monthsSL-6 R/B(2)’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 10 Jun 1971
1 entryFrom the same launch
1969-061
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1971-0139
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1971-0139
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.