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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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: 3 days ago
TLE from 3 days ago
0 COSMOS 1900
1 18665U 87101A 26171.01911967 .00000020 00000-0 28122-4 0 9995
2 18665 66.0847 18.5646 0025737 97.2162 263.1871 14.55663297 48895Epoch: 2026-06-20T00:27Z
TLE epoch observation values (Epoch: 2026-06-20T00:27:31.939Z)
Latitude
-0.00004°
Longitude
103.44175°
Altitude
711.504 km
Speed
7.499 km/s
True Right ascension
01h 14m 15s
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
02:13:17
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
723.872 km
Perigee altitude
687.409 km
Semi-major axis
7,083.777 km
Eccentricity
0.00257
Inclination
66.0847°
RAAN
18.5646°
Arg. of periapsis
97.2162°
True anomaly
262.89437°
Mean anomaly
263.1871°
Eccentric anomaly
263.04072°
Mean motion
3.64037 °/min
Orbital period
98.89 mins
BSTAR
0.000028122
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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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2026-06-22 15:15:29.882Z | 216.914° SW | 2026-06-22 15:19:29.882Z | 293.238° NW | 43.728° | 2026-06-22 15:23:29.882Z | 24.898° NE |
| 7 mins | 2026-06-22 23:55:29.882Z | 337.88° N | 2026-06-22 23:58:29.882Z | 55.849° ENE | 43.544° | 2026-06-23 00:02:29.882Z | 142.268° SSE |
| 7 mins | 2026-06-23 14:20:29.882Z | 179.482° S | 2026-06-23 14:23:29.882Z | 120.424° SE | 35.813° | 2026-06-23 14:27:29.882Z | 45.161° ENE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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