Key statistics
Satellite COSMOS 1900 at a glance.
Uptime
13881
Days in orbit
Revolutions
≈ 14.6
Per day
Orbit
LEO
Low Earth Orbit
Inclination
66.1
Latest
Satellite identification and parameters
Extended collection of information and parameters for COSMOS 1900.
Object identification
Identified? True
Debris? False
Object name: COSMOS 1900
International designator: 1987-101A
Object number (NORAD): 18665
Object ID (CCSDS): 18665
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 98.93 minutes
Inclination: 66.0825 deg
SMA: 7085.644 km
Apoapsis: 737.089 km
Periapsis: 677.929 km
RAAN: 189.5874 deg
Eccentricy: 0.0041746
Argument of periapsis: 224.0308 deg
Mean anomaly: 135.7471 deg
Mean motion: 14.55572248 rev/day
Mean motion (dot): 0.00000231 rev/day2
B* drag term: 0.00007611 1/REarth
Two-line elements (TLE)
Creation date: Dec. 12, 2025, 7:16 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 11, 2025, 11:24 p.m. UTC
TLE line 0: 0 COSMOS 1900
TLE line 1: 1 18665U 87101A 25345.97507135 .00000231 00000-0 76110-4 0 9994
TLE line 2: 2 18665 66.0825 189.5874 0041746 224.0308 135.7471 14.55572248 21237
Live tracking on map
Real-time ground track for satellite COSMOS 1900.
Associated space launch
Active radar satellite for ocean surveillance powered by a nuclear reactor.
COSMOS 1900 was lifted into orbit during the mission ‘Tsiklon-2 | US-A 31’, on board a Tsiklon-2 space rocket.
The launch took place on Dec. 12, 1987, 5:40 a.m. from 90.
For more information about the launch, click the button.
Tsiklon-2 | US-A 31
Agency: N/A
Status: Launch Successful
Launch date: Dec. 12, 1987, 5:40 a.m. UTC
Rocket: Tsiklon-2
Launch pad: 90
Location: Baikonur Cosmodrome, Republic of Kazakhstan
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