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RADUGA 21, 18631

Orbit data source: Space-Track

RADUGA 21, 18631 is a payload satellite owned by UNKS (CIS) in GEO that was launched on Thu, 10 Dec 1987 UTC via a PROTON-K/DM-2 launch vehicle from the Tyuratam Missile And Space Complex (TTMTR). Payloads include a variety of satellites, spacecraft, and rockets 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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RADUGA 21 details

Identifier	18631, 1987-100A
Orbit	GEO
Last TLE update	11 hours ago
Origin	UNKS (CIS)
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)	1987-12-10 (37 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, 9.5 m
Radar Cross Section	16.975 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 11 hours ago

0 RADUGA 21
1 18631U 87100A   24348.50061736 -.00000032  00000-0  00000+0 0  9999
2 18631  12.0962 329.2108 0002037 211.9678 327.3138  1.00184048135554

Epoch: 2024-12-13T12:00Z

Definitive object data (Epoch: 2024-12-13T12:00:53.339Z)

Latitude	0.14848°
Longitude	-114.39809°
Altitude	35,803.543 km
Speed	3.074 km/s
True Right ascension	09h 53m 57s
True Declination	0° 08' 54"
Sunlit	Object was in daylight at TLE epoch

Visualization TLE readout

Latitude	-3.00158°
Longitude	52.16394°
Altitude	35,817.053 km
Speed	3.073 km/s
Apparent Right ascension	20h 55m 26s
Apparent Declination	-9° 33' 07"
Sunlit	Object is in daylight

Visualization observer readout

Local Sidereal Time	21:36:39
Azimuth	193.237° SSW
Elevation	39.619°
Doppler factor	1

Orbital elements

Apogee altitude	35,820.804 km
Perigee altitude	35,803.616 km
Semi-major axis	42,190.347 km
Eccentricity	0.0002037
Inclination	12.0962°
RAAN	329.2108°
Arg. of periapsis	211.9678°
True anomaly	327.30119°
Mean anomaly	327.3138°
Eccentric anomaly	327.3075°
Mean motion	0.25045 °/min
BSTAR	Unknown
Orbital period	1437.4 mins