CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1973-0118
SL-6 R/B(1)
SL-6 R/B(1) (NORAD 6420) re-entered Earth’s atmosphere on 30 April 1973, after 25 days in orbit.
Official date
NORAD number
6420
International designator
1973-018C
Object type
Rocket body
Country
USSR
Launched
5 Apr 1973Plesetsk Cosmodrome
Re-entered (UTC)
30 Apr 1973UTC calendar day
Time in orbit
25 days25 days
How it ended
Re-entered (natural decay)
Latitude range
65.4°N to 65.4°SFinal inclination 65.4°
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 65.4°, allowed a re-entry anywhere between 65.4°N and 65.4°S.
Life in orbit
25 daysSL-6 R/B(1)’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 30 Apr 1973
2 entriesFrom the same launch
1973-018
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1973-0118
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1973-0118
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.