Key statistics
Satellite COSMOS 1639 at a glance.
Uptime
14827
Days in orbit
Revolutions
≈ 12.5
Per day
Orbit
LEO
Low Earth Orbit
Inclination
74.1
Latest
Satellite identification and parameters
Extended collection of information and parameters for COSMOS 1639.
Object identification
Identified? True
Debris? False
Object name: COSMOS 1639
International designator: 1985-023E
Object number (NORAD): 15621
Object ID (CCSDS): 15621
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 115.103 minutes
Inclination: 74.0528 deg
SMA: 7838.228 km
Apoapsis: 1479.096 km
Periapsis: 1441.09 km
RAAN: 282.2021 deg
Eccentricy: 0.0024244
Argument of periapsis: 72.3165 deg
Mean anomaly: 49.3291 deg
Mean motion: 12.51053614 rev/day
Mean motion (dot): -0.00000019 rev/day2
B* drag term: -0.000024222 1/REarth
Two-line elements (TLE)
Creation date: Oct. 23, 2025, 10:06 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Oct. 23, 2025, 11:13 a.m. UTC
TLE line 0: 0 COSMOS 1639
TLE line 1: 1 15621U 85023E 25296.46782502 -.00000019 00000-0 -24222-4 0 9999
TLE line 2: 2 15621 74.0528 282.2021 0024244 72.3165 49.3291 12.51053614853901
Live tracking on map
Real-time ground track for satellite COSMOS 1639.
In-orbit conjunctions
There are no conjunctions computed for COSMOS 1639, at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
Military communications satellites
COSMOS 1639 was lifted into orbit during the mission ‘Kosmos-3M | Strela-1M 289-296’, on board a Kosmos-3M space rocket.
The launch took place on March 21, 1985, 12:08 a.m. from 132/2.
For more information about the launch, click the button.
Kosmos-3M | Strela-1M 289-296
Agency: N/A
Status: Launch Successful
Launch date: March 21, 1985, 12:08 a.m. UTC
Rocket: Kosmos-3M
Launch pad: 132/2
Location: Plesetsk Cosmodrome, Russian Federation
...
Latest news about this satellite
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