COSMOS 2084, 20663
Orbit data source: Space-Track
COSMOS 2084, 20663 is a payload satellite owned by PVO (CIS) in LEO that was launched on Thu, 21 Jun 1990 UTC via an MOLNIYA 8K78M 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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20663 intel report (Beta)
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Identifier
Orbit
Country
CISRelated business
Manufacturer
NPOL/KOMET
Mission
Defense Early Warn
Bus & Motor
OKO, Unknown motor
Mass
~1,250 kg wet, ~1,150 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl + 2 Pan, 2.5 m
Radar Cross Section
6.333 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 13 hours ago
TLE from 13 hours ago
0 COSMOS 2084
1 20663U 90055A 26155.04803529 .00002445 00000-0 18031-3 0 9997
2 20663 62.7909 40.9352 0005620 255.1473 104.9006 15.06060518949324Epoch: 2026-06-04T01:09Z
TLE epoch observation values (Epoch: 2026-06-04T01:09:10.249Z)
Latitude
0.00006°
Longitude
131.14463°
Altitude
551.102 km
Speed
7.586 km/s
True Right ascension
02h 43m 44s
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
23:36:38
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
550.963 km
Perigee altitude
543.179 km
Semi-major axis
6,925.208 km
Eccentricity
0.00056
Inclination
62.7909°
RAAN
40.9352°
Arg. of periapsis
255.1473°
True anomaly
104.96282°
Mean anomaly
104.9006°
Eccentric anomaly
104.93171°
Mean motion
3.76612 °/min
Orbital period
95.59 mins
BSTAR
0.00018031
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Other satellites on launch #55 in the year 1990 (1990-06-21 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 2084 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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2026-06-04 17:14:03.002Z | 144.032° SSE | 2026-06-04 17:16:03.002Z | 109.555° ESE | 16.561° | 2026-06-04 17:18:03.002Z | 77.43° E |
| 5 mins | 2026-06-04 18:52:03.002Z | 251.122° W | 2026-06-04 18:54:03.002Z | 308.092° NW | 34.431° | 2026-06-04 18:57:03.002Z | 16.951° NNE |
| 5 mins | 2026-06-05 03:13:03.002Z | 304.575° NW | 2026-06-05 03:15:03.002Z | 241.307° WSW | 38.445° | 2026-06-05 03:18:03.002Z | 167.007° S |
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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