CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
2005-0033
SL-6 R/B(2)
SL-6 R/B(2) (NORAD 21633) re-entered Earth’s atmosphere on 17 March 2005, after 13 years, 7 months in orbit.
Official date
NORAD number
21633
International designator
1991-053D
Object type
Rocket body
Country
USSR
Launched
1 Aug 1991Plesetsk Cosmodrome
Re-entered (UTC)
17 Mar 2005UTC calendar dayAlso recorded as 16 Mar 2005
Time in orbit
13 years, 7 months4,977 days
How it ended
Re-entered (natural decay)
Latitude range
62.0°N to 62.0°SFinal inclination 62.0°
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 62.0°, allowed a re-entry anywhere between 62.0°N and 62.0°S.
Life in orbit
13 years, 7 monthsSL-6 R/B(2)’s lowest and highest points above Earth, week by week, from its tracking history.
From the same launch
1991-053
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/2005-0033
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/2005-0033
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.