COSMOS 2144, 21300
Orbit data source: Space-Track
COSMOS 2144, 21300 is a payload satellite owned by UNKS RF (CIS) in LEO that was launched on Thu, 16 May 1991 UTC via a TSIKLON-3 launch vehicle from the Plesetsk Missile And Space Complex (PKMTR). 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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21300 intel report (Beta)
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Identifier
Orbit
Country
CISRelated business
Manufacturer
NPO PM
Mission
Defense Communications
Bus & Motor
STRELA-3, Unknown motor
Mass
225 kg wet, 225 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl, 0.8 m
Radar Cross Section
1.257 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 COSMOS 2144
1 21300U 91033B 26171.40611378 .00000036 00000-0 14217-3 0 9996
2 21300 82.5783 327.3249 0006085 104.3137 255.8630 12.62393121616865Epoch: 2026-06-20T09:44Z
TLE epoch observation values (Epoch: 2026-06-20T09:44:48.230Z)
Latitude
-0.00004°
Longitude
-87.49726°
Altitude
1,416.973 km
Speed
7.152 km/s
True Right ascension
21h 49m 17s
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
00:51:08
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,415.142 km
Perigee altitude
1,405.664 km
Semi-major axis
7,788.54 km
Eccentricity
0.00061
Inclination
82.5783°
RAAN
327.3249°
Arg. of periapsis
104.3137°
True anomaly
255.7954°
Mean anomaly
255.863°
Eccentric anomaly
255.8292°
Mean motion
3.15761 °/min
Orbital period
114.01 mins
BSTAR
0.00014217
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Other satellites on launch #33 in the year 1991 (1991-05-16 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 2144 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. |
|---|---|---|---|---|---|---|---|
| 15 mins | 2026-06-22 21:18:34.423Z | 3.325° NNE | 2026-06-22 21:26:34.423Z | 79.34° E | 36.369° | 2026-06-22 21:33:34.423Z | 146.24° SSE |
| 12 mins | 2026-06-22 23:15:34.423Z | 328.358° NNW | 2026-06-22 23:21:34.423Z | 268.033° W | 29.632° | 2026-06-22 23:27:34.423Z | 216.429° SW |
| 14 mins | 2026-06-23 10:07:34.423Z | 155.903° SSE | 2026-06-23 10:14:34.423Z | 81.483° E | 36.361° | 2026-06-23 10:21:34.423Z | 19.882° NNE |
| 13 mins | 2026-06-23 12:03:34.423Z | 231.415° WSW | 2026-06-23 12:09:34.423Z | 291.037° WNW | 29.927° | 2026-06-23 12:16:34.423Z | 350.889° 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 descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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