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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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Identifier
18665, 1987-101A
Orbit
LEO
Last TLE update
9 hours ago
Origin
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)
1987-12-12 (38 years ago)
Launch vehicle
TSIKLON-2
Launch site
Tyuratam Missile And Space Complex (TTMTR)
Object type
Payload
Rocket body
Debris
Shape & HBR
Cone + Cyl, 5.8 m
Radar Cross Section
6.586 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 9 hours ago
0 COSMOS 1900
1 18665U 87101A   25192.60958576  .00000014  00000-0  26998-4 0  9991
2 18665  66.0835 258.0609 0043939 299.6944  59.9792 14.55478664998947
Epoch: 2025-07-11T14:37Z
TLE epoch observation values (Epoch: 2025-07-11T14:37:48.209Z)
Latitude
0.00004°
Longitude
108.85099°
Altitude
694.417 km
Speed
7.518 km/s
True Right ascension
17h 12m 14s
True Declination
0° 00' 00"
Sunlit
Object was in full shadow at epoch
Visualization orbit readout
Latitude
37.82629°
Longitude
-92.21075°
Altitude
741.683 km
Speed
7.472 km/s
Apparent Right ascension
01h 58m 22s
Apparent Declination
1° 42' 57"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time
11:50:37
Azimuth
317.011° NNW
Elevation
-39.152°
Doppler factor
1
Orbital elements
Apogee altitude
737.368 km
Perigee altitude
675.112 km
Semi-major axis
7,084.377 km
Eccentricity
0.00439
Inclination
66.0835°
RAAN
258.0609°
Arg. of periapsis
299.6944°
True anomaly
Unknown
Mean anomaly
59.9792°
Eccentric anomaly
Unknown
Mean motion
3.63991 °/min
Orbital period
98.9 mins
BSTAR
0.000026998
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COSMOS 1900 Visibility forecast

Observer location: undefined°, undefined°

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 mins2025-07-12 05:35:36.142Z184.69° SSW2025-07-12 05:39:36.142Z121.765° SE35.88°2025-07-12 05:43:36.142Z45.669° ENE
6 mins2025-07-12 07:19:36.142Z277.035° WNW2025-07-12 07:21:36.142Z309.941° NW22.112°2025-07-12 07:25:36.142Z4.797° NNE
7 mins2025-07-12 14:15:36.142Z356.401° N2025-07-12 14:18:36.142Z45.33° ENE28.642°2025-07-12 14:22:36.142Z110.654° ESE
7 mins2025-07-12 15:57:36.142Z299.244° NW2025-07-12 16:00:36.142Z246.402° WSW28.139°2025-07-12 16:04:36.142Z188.801° SSW
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