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RADUGA 8, 12351

Orbit data source: Space-Track

RADUGA 8, 12351 is a payload satellite owned by GUKOS (CIS) in GEO that was launched on Wed, 18 Mar 1981 UTC via a PROTON-K/DM 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 src="https://www.satcat.com/sats-embedded/12351?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/12351?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

12351, 1981-027A

Orbit

GEO

Country

CIS

Related business

Russian Space Forces (RU)

Manufacturer

NPO PM

Mission

Non-operational spacecraft

Bus & Motor

RADUGA, Unknown motor

Mass

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

Launch date (UTC)

1981-03-18 (45 years ago)

Launch vehicle

PROTON-K/DM

Launch site

Tyuratam Missile And Space Complex (TTMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Large (>1 m²)

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Last TLE update: 14 hours ago

TLE from 14 hours ago

0 RADUGA 8
1 12351U 81027A   26044.35600256  .00000136  00000-0  00000+0 0  9992
2 12351   6.5899 290.5891 0080041 271.5616 279.7276  1.00388033121309

Epoch: 2026-02-13T08:32Z

TLE epoch observation values (Epoch: 2026-02-13T08:32:38.621Z)

Latitude

-1.1752°

Longitude

-150.61138°

Altitude

35,698.101 km

Speed

3.08 km/s

True Right ascension

08h 03m 46s

True Declination

-1° 10' 26"

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

01:08:24

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

36,092.327 km

Perigee altitude

35,417.85 km

Semi-major axis

42,133.225 km

Eccentricity

0.008

Inclination

6.5899°

RAAN

290.5891°

Arg. of periapsis

271.5616°

True anomaly

278.82209°

Mean anomaly

279.7276°

Eccentric anomaly

279.27499°

Mean motion

0.25096 °/min

Orbital period

1,434.49 mins

BSTAR

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Other satellites on launch #27 in the year 1981 (1981-03-18 UTC)

SL-12 PLAT, 12352 (Decayed)

SL-12 R/B(1), 12353 (Decayed)

SL-12 R/B(AUX MOTOR), 12396 (Decayed)

SL-12 R/B(2), 14194

SL-12 R/B(AUX MOTOR), 12397 (Decayed)

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RADUGA 8 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	2026-02-13 22:33:00.392Z	239.773° WSW	2026-02-14 01:30:00.392Z	241.922° WSW	27.184°	2026-02-14 22:33:00.392Z	239.488° WSW

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12351 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 8, 12351 on other resources

View RADUGA 8, 12351 on NASA - NSSDCA Website

View RADUGA 8, 12351 on Heavens-Above

View RADUGA 8, 12351 on Keep Track

View RADUGA 8, 12351 on Celestrak

View RADUGA 8, 12351 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 8, 12351

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: 2026-02-13T08:32:38.621Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #27 in the year 1981 (1981-03-18 UTC)

RADUGA 8 Visibility forecast

12351 neighbors

Co-orbital & Co-planar RSOs

Check out RADUGA 8, 12351 on other resources

Documentation

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