COSMOS 2147, 21303
Orbit data source: Space-Track
COSMOS 2147, 21303 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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21303 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: 10 hours ago
TLE from 10 hours ago
0 COSMOS 2147
1 21303U 91033E 25273.45807266 .00000044 00000-0 17824-3 0 9995
2 21303 82.5619 82.1107 0018366 232.0999 156.0050 12.65156937587304Epoch: 2025-09-30T10:59Z
TLE epoch observation values (Epoch: 2025-09-30T10:59:37.477Z)
Latitude
27.97101°
Longitude
-88.28664°
Altitude
1,418.093 km
Speed
7.148 km/s
True Right ascension
05h 44m 15s
True Declination
27° 50' 27"
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
14:41:59
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,413.332 km
Perigee altitude
1,384.765 km
Semi-major axis
7,777.185 km
Eccentricity
0.00184
Inclination
82.5619°
RAAN
82.1107°
Arg. of periapsis
232.0999°
True anomaly
156.09041°
Mean anomaly
156.005°
Eccentric anomaly
156.04772°
Mean motion
3.16453 °/min
Orbital period
113.76 mins
BSTAR
0.00017824
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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 2147 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 | 2025-09-30 22:51:01.479Z | 359.887° N | 2025-09-30 22:58:01.479Z | 79.612° E | 42.255° | 2025-09-30 23:06:01.479Z | 160.905° S |
| 11 mins | 2025-10-01 00:47:01.479Z | 321.396° NNW | 2025-10-01 00:52:01.479Z | 278.283° WNW | 22.668° | 2025-10-01 00:58:01.479Z | 229.628° WSW |
| 14 mins | 2025-10-01 11:37:01.479Z | 168.76° S | 2025-10-01 11:44:01.479Z | 82.626° E | 41.975° | 2025-10-01 11:51:01.479Z | 14.923° NNE |
| 11 mins | 2025-10-01 13:34:01.479Z | 246.282° WSW | 2025-10-01 13:39:01.479Z | 290.876° WNW | 23.919° | 2025-10-01 13:45:01.479Z | 341.976° 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 ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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