COSMOS 2146, 21302
Orbit data source: Space-Track
COSMOS 2146, 21302 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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21302 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 2146
1 21302U 91033D 25273.61788197 .00000041 00000-0 16733-3 0 9998
2 21302 82.5704 100.7718 0015209 259.4677 100.4702 12.64545575586510Epoch: 2025-09-30T14:49Z
TLE epoch observation values (Epoch: 2025-09-30T14:49:45.002Z)
Latitude
-0.00001°
Longitude
-131.27038°
Altitude
1,409.14 km
Speed
7.155 km/s
True Right ascension
06h 43m 05s
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
14:43:15
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,413.389 km
Perigee altitude
1,389.724 km
Semi-major axis
7,779.693 km
Eccentricity
0.00152
Inclination
82.5704°
RAAN
100.7718°
Arg. of periapsis
259.4677°
True anomaly
100.64152°
Mean anomaly
100.4702°
Eccentric anomaly
100.55587°
Mean motion
3.163 °/min
Orbital period
113.82 mins
BSTAR
0.00016733
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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 2146 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. |
|---|---|---|---|---|---|---|---|
| 12 mins | 2025-09-30 23:02:17.008Z | 16.791° NNE | 2025-09-30 23:08:17.008Z | 66.878° ENE | 24.045° | 2025-09-30 23:14:17.008Z | 118.604° SE |
| 14 mins | 2025-10-01 00:57:17.008Z | 343.603° N | 2025-10-01 01:04:17.008Z | 251.155° W | 41.599° | 2025-10-01 01:11:17.008Z | 190.403° SSW |
| 10 mins | 2025-10-01 11:51:17.008Z | 122.639° SE | 2025-10-01 11:56:17.008Z | 77.105° E | 23.068° | 2025-10-01 12:01:17.008Z | 36.001° NE |
| 14 mins | 2025-10-01 13:43:17.008Z | 202.268° SSW | 2025-10-01 13:50:17.008Z | 293.901° NW | 41.889° | 2025-10-01 13:57:17.008Z | 0.459° NNE |
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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