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RADUGA 25, 20499

Orbit data source: Space-Track

RADUGA 25, 20499 is a payload satellite owned by UNKS (CIS) in GEO that was launched on Thu, 15 Feb 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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Iframe URL

https://www.satcat.com/sats-embedded/20499?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

20499, 1990-016A

Orbit

GEO

Country

CIS

Related business

Russian Space Forces (RU)

Manufacturer

NPO PM

Mission

Non-operational Defense Communications

Bus & Motor

RADUGA, Unknown motor

Mass

1,965 kg wet, ~1,800 kg dry

Launch date (UTC)

1990-02-15 (36 years ago)

Launch vehicle

PROTON-K/DM-2

Launch site

Tyuratam Missile And Space Complex (TTMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl + 2 Pan, 4.8 m

Radar Cross Section

16.975 m², Large (>1 m²)

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Last TLE update: 14 hours ago

TLE from 14 hours ago

0 RADUGA 25
1 20499U 90016A   26095.09451857 -.00000302  00000-0  00000-0 0  9997
2 20499  12.3981 335.1998 0004202 218.5284 338.7696  1.00204630132178

Epoch: 2026-04-05T02:16Z

TLE epoch observation values (Epoch: 2026-04-05T02:16:06.404Z)

Latitude

-3.66998°

Longitude

-55.30911°

Altitude

35,788.925 km

Speed

3.075 km/s

True Right ascension

11h 28m 29s

True Declination

-3° 39' 59"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

22:24:28

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

35,824.155 km

Perigee altitude

35,788.703 km

Semi-major axis

42,184.566 km

Eccentricity

0.00042

Inclination

12.3981°

RAAN

335.1998°

Arg. of periapsis

218.5284°

True anomaly

338.75215°

Mean anomaly

338.7696°

Eccentric anomaly

338.76088°

Mean motion

0.2505 °/min

Orbital period

1,437.11 mins

BSTAR

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Computing Atmospheric mass density...

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Other satellites on launch #16 in the year 1990 (1990-02-15 UTC)

SL-12 R/B(2), 20502

SL-12 PLAT, 20501 (Decayed)

SL-12 R/B(AUX MOTOR), 20506 (Decayed)

SL-12 R/B(AUX MOTOR), 20507 (Decayed)

SL-12 R/B(1), 20500 (Decayed)

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RADUGA 25 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.
1440 mins	2026-04-05 16:28:59.666Z	110.763° ESE	2026-04-05 18:41:59.666Z	107.822° ESE	27.16°	2026-04-06 16:28:59.666Z	110.878° ESE

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20499 neighbors

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Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

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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

CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out RADUGA 25, 20499 on other resources

View RADUGA 25, 20499 on NASA - NSSDCA Website

View RADUGA 25, 20499 on Heavens-Above

View RADUGA 25, 20499 on Keep Track

View RADUGA 25, 20499 on Celestrak

View RADUGA 25, 20499 on Gunter's Space Page

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

RADUGA 25, 20499

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 14 hours ago

TLE from 14 hours ago

TLE epoch observation values (Epoch: 2026-04-05T02:16:06.404Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #16 in the year 1990 (1990-02-15 UTC)

RADUGA 25 Visibility forecast

20499 neighbors

Co-orbital & Co-planar RSOs

Check out RADUGA 25, 20499 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 14 hours ago