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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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https://www.satcat.com/sats-embedded/18665?theme=dark&initialShowStats=false

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Identifier

18665, 1987-101A

Orbit

LEO

Country

CIS

Related business

Russian Navy (RU)

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, 2.9 m

Radar Cross Section

6.586 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 13 hours ago

TLE from 13 hours ago

0 COSMOS 1900
1 18665U 87101A   25355.86924690  .00000123  00000-0  51670-4 0  9996
2 18665  66.0821 161.9421 0040955 218.8770 140.9389 14.55576997 22670

Epoch: 2025-12-21T20:51Z

TLE epoch observation values (Epoch: 2025-12-21T20:51:42.932Z)

Latitude

-0.00001°

Longitude

118.3377°

Altitude

732.156 km

Speed

7.478 km/s

True Right ascension

10h 47m 46s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

08:59:36

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

734.934 km

Perigee altitude

676.908 km

Semi-major axis

7,084.058 km

Eccentricity

0.0041

Inclination

66.0821°

RAAN

161.9421°

Arg. of periapsis

218.877°

True anomaly

141.23346°

Mean anomaly

140.9389°

Eccentric anomaly

141.0863°

Mean motion

3.64016 °/min

Orbital period

98.9 mins

BSTAR

0.00005167

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Other satellites on launch #101 in the year 1987 (1987-12-12 UTC)

COSMOS 1900 DEB, 19553 (Decayed)

COSMOS 1900 DEB, 19589 (Decayed)

COSMOS 1900 DEB, 43501

COSMOS 1900 DEB, 43499

COSMOS 1900 DEB, 43500

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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	2025-12-22 11:50:13.662Z	147.697° SSE	2025-12-22 11:53:13.662Z	104.541° ESE	20.009°	2025-12-22 11:56:13.662Z	64.637° ENE
8 mins	2025-12-22 13:31:13.662Z	239.001° WSW	2025-12-22 13:34:13.662Z	299.611° NW	36.595°	2025-12-22 13:39:13.662Z	19.355° NNE
5 mins	2025-12-22 20:29:13.662Z	15.199° NNE	2025-12-22 20:31:13.662Z	42.883° NE	16.353°	2025-12-22 20:34:13.662Z	82.081° E
8 mins	2025-12-22 22:10:13.662Z	323.388° NNW	2025-12-22 22:13:13.662Z	271.941° WNW	43.235°	2025-12-22 22:18:13.662Z	159.116° S

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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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Check out COSMOS 1900, 18665 on other resources

View COSMOS 1900, 18665 on NASA - NSSDCA Website

View COSMOS 1900, 18665 on Heavens-Above

View COSMOS 1900, 18665 on Keep Track

View COSMOS 1900, 18665 on Celestrak

View COSMOS 1900, 18665 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

COSMOS 1900, 18665

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 13 hours ago

TLE from 13 hours ago

TLE epoch observation values (Epoch: 2025-12-21T20:51:42.932Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #101 in the year 1987 (1987-12-12 UTC)

COSMOS 1900 Visibility forecast

Co-orbital & Co-planar RSOs

Check out COSMOS 1900, 18665 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 13 hours ago