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: 13 hours ago
TLE from 13 hours ago
0 COSMOS 1900
1 18665U 87101A 25355.80053751 .00000089 00000-0 44030-4 0 9994
2 18665 66.0821 162.1341 0040964 218.9123 140.9033 14.55576766 22666Epoch: 2025-12-21T19:12Z
TLE epoch observation values (Epoch: 2025-12-21T19:12:46.440Z)
Latitude
-0.00005°
Longitude
143.33279°
Altitude
732.151 km
Speed
7.478 km/s
True Right ascension
10h 48m 32s
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
07:00:34
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
734.941 km
Perigee altitude
676.902 km
Semi-major axis
7,084.059 km
Eccentricity
0.0041
Inclination
66.0821°
RAAN
162.1341°
Arg. of periapsis
218.9123°
True anomaly
141.19815°
Mean anomaly
140.9033°
Eccentric anomaly
141.05084°
Mean motion
3.64016 °/min
Orbital period
98.9 mins
BSTAR
0.00004403
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2025-12-22 11:49:31.767Z | 154.163° SSE | 2025-12-22 11:52:31.767Z | 116.273° SE | 19.821° | 2025-12-22 11:56:31.767Z | 62.051° ENE |
| 8 mins | 2025-12-22 13:30:31.767Z | 234.673° WSW | 2025-12-22 13:34:31.767Z | 311.411° NW | 36.556° | 2025-12-22 13:38:31.767Z | 16.525° NNE |
| 4 mins | 2025-12-22 20:29:31.767Z | 18.884° NNE | 2025-12-22 20:31:31.767Z | 47.418° ENE | 16.302° | 2025-12-22 20:33:31.767Z | 74.618° E |
| 7 mins | 2025-12-22 22:10:31.767Z | 322.567° NNW | 2025-12-22 22:13:31.767Z | 240.542° WSW | 43.642° | 2025-12-22 22:17:31.767Z | 160.101° S |
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 descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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