COSMOS 2145, 21301
Orbit data source: Space-Track
COSMOS 2145, 21301 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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21301 intel report (Beta)
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Edit Public Description
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: 6 hours ago
TLE from 6 hours ago
0 COSMOS 2145
1 21301U 91033C 25273.63512634 .00000038 00000-0 15075-3 0 9994
2 21301 82.5624 113.4262 0008014 324.2582 35.7972 12.63206743584738Epoch: 2025-09-30T15:14Z
TLE epoch observation values (Epoch: 2025-09-30T15:14:34.915Z)
Latitude
-0.00007°
Longitude
-124.84095°
Altitude
1,407.406 km
Speed
7.159 km/s
True Right ascension
07h 33m 42s
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
14:42:00
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,413.296 km
Perigee altitude
1,400.817 km
Semi-major axis
7,785.193 km
Eccentricity
0.0008
Inclination
82.5624°
RAAN
113.4262°
Arg. of periapsis
324.2582°
True anomaly
35.85096°
Mean anomaly
35.7972°
Eccentric anomaly
35.82408°
Mean motion
3.15965 °/min
Orbital period
113.94 mins
BSTAR
0.00015075
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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 2145 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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2025-09-30 23:28:02.744Z | 25.173° NE | 2025-09-30 23:33:02.744Z | 63.83° ENE | 17.324° | 2025-09-30 23:38:02.744Z | 102.258° ESE |
| 15 mins | 2025-10-01 01:22:02.744Z | 352.096° N | 2025-10-01 01:29:02.744Z | 291.727° WNW | 44.991° | 2025-10-01 01:37:02.744Z | 175.51° S |
| 7 mins | 2025-10-01 03:20:02.744Z | 304.081° NW | 2025-10-01 03:23:02.744Z | 280.089° WNW | 15.476° | 2025-10-01 03:27:02.744Z | 250.316° W |
| 7 mins | 2025-10-01 12:19:02.744Z | 103.37° ESE | 2025-10-01 12:22:02.744Z | 79.481° E | 16.098° | 2025-10-01 12:26:02.744Z | 48.128° ENE |
| 15 mins | 2025-10-01 14:09:02.744Z | 186.232° SSW | 2025-10-01 14:16:02.744Z | 323.281° NNW | 44.978° | 2025-10-01 14:24:02.744Z | 7.42° NNE |
| 9 mins | 2025-10-01 16:08:02.744Z | 265.09° W | 2025-10-01 16:12:02.744Z | 296.689° NW | 16.579° | 2025-10-01 16:17:02.744Z | 334.814° NNW |
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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