CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Orbital Register seal
Entry no.
1966-0426

CIS UNKNOWN 1

CIS UNKNOWN 1 (NORAD 2437) re-entered Earth’s atmosphere on 11 November 1966, after 1 month in orbit.

Official date
NORAD number
2437
International designator
1966-088A
Object type
Spacecraft
Country
USSR
Launched
17 Sep 1966Baikonur Cosmodrome
Re-entered (UTC)
11 Nov 1966UTC calendar day
Time in orbit
1 month55 days
How it ended
Re-entered (natural decay)
Latitude range
—
Mass
1,450 kg
Operator
RVSN
Built by
Southern SDB
Bus
OGCh
Programme
OGCh

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

1 month

Also ended on 11 Nov 1966

1 entry
1966-0427CIS UNKNOWN 2 DEB

From the same launch

1966-088
1967-0049SL-11 R/B
Orbital Register seal
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1966-0426
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.