CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
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Entry no.
1979-0585

SL-6 R/B(2)

SL-6 R/B(2) (NORAD 6439) re-entered Earth’s atmosphere on 5 December 1979, after 6 years, 8 months in orbit.

Official date
NORAD number
6439
International designator
1973-018D
Object type
Rocket body
Country
USSR
Launched
5 Apr 1973Plesetsk Cosmodrome
Re-entered (UTC)
5 Dec 1979UTC calendar day
Time in orbit
6 years, 8 months2,435 days
How it ended
Re-entered (natural decay)
Latitude range
—
Mass
4,500 kg

Where it came down

Not on record

No position was recorded for this re-entry. Its final orbit is not on record.

Life in orbit

6 years, 8 months

SL-6 R/B(2)’s lowest and highest points above Earth, week by week, from its tracking history.

Also ended on 5 Dec 1979

5 entries
1979-0586MOLNIYA 1-241979-0589Kosmos-1112 SS 151979-0590Kosmos-1112 SS 211979-0587SL-6 R/B(2)1979-0588COSMOS 1111 DEB

From the same launch

1973-018
1973-0118SL-6 R/B(1)1979-0011MOLNIYA 2-5
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Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1979-0585
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