CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1990-0214
SL-6 R/B(1)
SL-6 R/B(1) (NORAD 20537) re-entered Earth’s atmosphere on 22 April 1990, after 26 days in orbit.
Official date
NORAD number
20537
International designator
1990-026B
Object type
Rocket body
Country
USSR
Launched
27 Mar 1990Plesetsk Cosmodrome
Re-entered (UTC)
22 Apr 1990UTC calendar day
Time in orbit
26 days26 days
How it ended
Re-entered (natural decay)
Latitude range
62.7°N to 62.7°SFinal inclination 62.7°
Mass
2,350 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 62.7°, allowed a re-entry anywhere between 62.7°N and 62.7°S.
Life in orbit
26 daysSL-6 R/B(1)’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 22 Apr 1990
2 entriesFrom the same launch
1990-026
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1990-0214
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1990-0214
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.