COSMOS 1900, 18665
Orbit data source: Space-Track
COSMOS 1900, 18665 is a payload satellite owned by VMF (CIS) in LEO that was launched on Sat, 12 Dec 1987 UTC via a TSIKLON-2 launch vehicle from the Tyuratam Missile And Space Complex (TTMTR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
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18665 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
CISRelated business
Manufacturer
KOMET/ARSL
Mission
Defense Sigint
Bus & Motor
US-A REACTOR, Unknown motor
Mass
4,300 kg wet, 1,154 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cone + Cyl, 2.9 m
Radar Cross Section
6.586 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 19 hours ago
TLE from 19 hours ago
0 COSMOS 1900
1 18665U 87101A 25259.88003137 .00000094 00000-0 45140-4 0 9997
2 18665 66.0829 70.1271 0045462 266.7444 92.8461 14.55505720 8700Epoch: 2025-09-16T21:07Z
TLE epoch observation values (Epoch: 2025-09-16T21:07:14.71Z)
Latitude
0.00006°
Longitude
117.25184°
Altitude
711.551 km
Speed
7.499 km/s
True Right ascension
04h 40m 30s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
09:21:03
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
738.359 km
Perigee altitude
673.946 km
Semi-major axis
7,084.289 km
Eccentricity
0.00455
Inclination
66.0829°
RAAN
70.1271°
Arg. of periapsis
266.7444°
True anomaly
93.36626°
Mean anomaly
92.8461°
Eccentric anomaly
93.1062°
Mean motion
3.63998 °/min
Orbital period
98.9 mins
BSTAR
0.00004514
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Other satellites on launch #101 in the year 1987 (1987-12-12 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.COSMOS 1900 Visibility forecast
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Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2025-09-17 20:44:04.913Z | 4.872° NNE | 2025-09-17 20:47:04.913Z | 44.555° NE | 18.044° | 2025-09-17 20:50:04.913Z | 84.548° E |
| 8 mins | 2025-09-17 22:26:04.913Z | 320.153° NNW | 2025-09-17 22:29:04.913Z | 257.923° W | 42.333° | 2025-09-17 22:34:04.913Z | 162.25° S |
| 8 mins | 2025-09-18 12:51:04.913Z | 204.14° SW | 2025-09-18 12:54:04.913Z | 126.068° SE | 44.777° | 2025-09-18 12:59:04.913Z | 31.679° NE |
| 4 mins | 2025-09-18 14:35:04.913Z | 298.593° NW | 2025-09-18 14:36:04.913Z | 312.094° NW | 15.423° | 2025-09-18 14:39:04.913Z | 350.589° N |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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