CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1986-0173
SL-6 R/B(2)
SL-6 R/B(2) (NORAD 7546) re-entered Earth’s atmosphere on 21 April 1986, after 11 years, 5 months in orbit.
Official date
NORAD number
7546
International designator
1974-092E
Object type
Rocket body
Country
USSR
Launched
21 Nov 1974Plesetsk Cosmodrome
Re-entered (UTC)
21 Apr 1986UTC calendar dayAlso recorded as 9 Mar 1986
Time in orbit
11 years, 5 months4,169 days
How it ended
Re-entered (natural decay)
Latitude range
63.6°N to 63.6°SFinal inclination 63.6°
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 63.6°, allowed a re-entry anywhere between 63.6°N and 63.6°S.
Life in orbit
11 years, 5 monthsSL-6 R/B(2)’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 21 Apr 1986
3 entriesFrom the same launch
1974-092
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1986-0173
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1986-0173
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.