Showing default

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.

Loading next visibility...

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/20663?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/20663?theme=dark&initialShowStats=false

Optional Secondary NORAD IDs

Max 10 NORAD IDs; Separated by commas

Initial load time (optional)

ISO8601 Format

TLE date request (optional)

ISO8601 Format

Identifier

20663, 1990-055A

Orbit

LEO

Last TLE update

18 hours ago

Origin

Russian Aerospace Forces (CIS)

Manufacturer

NPOL/KOMET

Mission

Defense Early Warn

Bus & Motor

OKO, Unknown motor

Mass

~1,250 kg wet, ~1,150 kg dry

Launch date (UTC)

1990-06-21 (35 years ago)

Launch vehicle

MOLNIYA 8K78M

Launch site

Plesetsk Missile And Space Complex (PKMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl + 2 Pan, 2.5 m

Radar Cross Section

6.333 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 18 hours ago

0 COSMOS 2084
1 20663U 90055A   25198.00344818  .00001711  00000-0  13457-3 0  9992
2 20663  62.7895  58.2786 0056532 157.6186 202.7399 15.03800877900850

Epoch: 2025-07-17T00:04Z

TLE epoch observation values (Epoch: 2025-07-17T00:04:57.922Z)

Latitude

-0.00008°

Longitude

121.96172°

Altitude

593.218 km

Speed

7.544 km/s

True Right ascension

03h 53m 06s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

17.41577°

Longitude

-69.85546°

Altitude

517.262 km

Speed

7.628 km/s

Apparent Right ascension

16h 45m 36s

Apparent Declination

-11° 24' 41"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

07:03:38

Azimuth

56.571° ENE

Elevation

-48.288°

Doppler factor

Orbital elements

Apogee altitude

593.198 km

Perigee altitude

514.821 km

Semi-major axis

6,932.146 km

Eccentricity

0.00565

Inclination

62.7895°

RAAN

58.2786°

Arg. of periapsis

157.6186°

True anomaly

Unknown

Mean anomaly

202.7399°

Eccentric anomaly

Unknown

Mean motion

3.76047 °/min

Orbital period

95.73 mins

BSTAR

0.00013457

Loading maneuver chart data...

Loading SW <> Apogee altitude chart data...

Loading historical data...

Other satellites on launch #55 in the year 1990 (1990-06-21 UTC)

SL-6 R/B(1), 20664 (Decayed)

SL-6 PLAT, 20665 (Decayed)

SL-6 R/B(2), 20666

SL-6 DEB, 43502 (Decayed)

COSMOS 2084 Visibility forecast

Observer location: undefined°, undefined°

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.
6 mins	2025-07-18 00:32:48.601Z	346.532° N	2025-07-18 00:35:48.601Z	53.96° ENE	30.286°	2025-07-18 00:38:48.601Z	114.102° SE
4 mins	2025-07-18 02:12:48.601Z	271.534° WNW	2025-07-18 02:13:48.601Z	252.278° W	17.816°	2025-07-18 02:16:48.601Z	200.692° SSW
7 mins	2025-07-18 16:07:48.601Z	199.095° SSW	2025-07-18 16:10:48.601Z	116.259° SE	41.784°	2025-07-18 16:14:48.601Z	41.133° NE

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

Authenticating...

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 ascending order

Check out COSMOS 2084, 20663 on other resources

View COSMOS 2084, 20663 on NASA - NSSDCA Website

View COSMOS 2084, 20663 on Heavens-Above

View COSMOS 2084, 20663 on Keep Track

View COSMOS 2084, 20663 on Celestrak

View COSMOS 2084, 20663 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.