COSMOS 2081 (GLONASS), 20621
Orbit data source: Space-Track
COSMOS 2081 (GLONASS), 20621 is a payload satellite owned by UNKS (CIS) in MEO that was launched on Sat, 19 May 1990 UTC via a PROTON-K/DM-2 launch vehicle from the Tyuratam Missile And Space Complex (TTMTR). 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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20621 intel report (Beta)
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Identifier
Orbit
Country
CISRelated business
Manufacturer
Polyot
Mission
Non-operational Defense Navigation
Bus & Motor
URAGAN, Unknown motor
Mass
1,300 kg wet, ~1,200 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl + 2 Pan, 4.2 m
Radar Cross Section
14.707 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 3 days ago
TLE from 3 days ago
0 COSMOS 2081 (GLONASS)
1 20621U 90045C 26170.30534390 -.00000056 00000-0 00000-0 0 9994
2 20621 64.7300 308.5738 0046343 212.9438 191.0789 2.13104834280737Epoch: 2026-06-19T07:19Z
TLE epoch observation values (Epoch: 2026-06-19T07:19:41.712Z)
Latitude
38.91259°
Longitude
-46.54764°
Altitude
19,249.434 km
Speed
3.936 km/s
True Right ascension
22h 03m 38s
True Declination
38° 51' 57"
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
23:09:05
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
19,247.495 km
Perigee altitude
19,011.077 km
Semi-major axis
25,507.423 km
Eccentricity
0.00463
Inclination
64.73°
RAAN
308.5738°
Arg. of periapsis
212.9438°
True anomaly
190.97743°
Mean anomaly
191.0789°
Eccentric anomaly
191.02811°
Mean motion
0.53277 °/min
Orbital period
675.71 mins
BSTAR
0
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Other satellites on launch #45 in the year 1990 (1990-05-19 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 2081 (GLONASS) 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. |
|---|---|---|---|---|---|---|---|
| 376 mins | 2026-06-22 12:29:48.437Z | 234.489° WSW | 2026-06-22 15:43:48.437Z | 5.511° NNE | 40.15° | 2026-06-22 18:45:48.437Z | 128.95° SE |
| 91 mins | 2026-06-23 10:35:48.437Z | 208.033° SW | 2026-06-23 12:06:48.437Z | 243.347° WSW | 38.28° | 2026-06-23 12:06:48.437Z | 243.347° WSW |
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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Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in descending order |
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