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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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 2147
1 21303U 91033E 26171.32857149 .00000030 00000-0 10259-3 0 9994
2 21303 82.5667 273.2093 0018612 358.8151 56.2310 12.65166124620548Epoch: 2026-06-20T07:53Z
TLE epoch observation values (Epoch: 2026-06-20T07:53:08.576Z)
Latitude
54.62824°
Longitude
-103.08426°
Altitude
1,402.62 km
Speed
7.168 km/s
True Right ascension
18h 54m 59s
True Declination
54° 28' 45"
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
00:51:05
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,413.485 km
Perigee altitude
1,384.536 km
Semi-major axis
7,777.148 km
Eccentricity
0.00186
Inclination
82.5667°
RAAN
273.2093°
Arg. of periapsis
358.8151°
True anomaly
56.40852°
Mean anomaly
56.231°
Eccentric anomaly
56.31974°
Mean motion
3.16456 °/min
Orbital period
113.76 mins
BSTAR
0.00010259
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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. |
|---|---|---|---|---|---|---|---|
| 13 mins | 2026-06-22 17:08:32.047Z | 14.649° NNE | 2026-06-22 17:14:32.047Z | 64.46° ENE | 25.66° | 2026-06-22 17:21:32.047Z | 124.96° SE |
| 14 mins | 2026-06-22 19:03:32.047Z | 342.051° N | 2026-06-22 19:10:32.047Z | 257.969° W | 40.379° | 2026-06-22 19:17:32.047Z | 193.913° SSW |
| 11 mins | 2026-06-23 05:56:32.047Z | 130.198° SE | 2026-06-23 06:01:32.047Z | 86.851° E | 24.467° | 2026-06-23 06:07:32.047Z | 34.013° NE |
| 14 mins | 2026-06-23 07:49:32.047Z | 205.987° SW | 2026-06-23 07:55:32.047Z | 266.971° W | 40.477° | 2026-06-23 08:03:32.047Z | 359.499° 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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