SL-12 R/B(2), 12850

Orbit data source: Space-Track

SL-12 R/B(2), 12850 is space debris in GEO originally from a launch on Thu, 30 Jul 1981 UTC launched from the Tyuratam Missile And Space Complex (TTMTR). Debris objects in space refer to the collection of defunct objects orbiting the Earth. Examples of debris include non-operational satellites, rocket bodies, and fragments generated from explosions, collisions, or faulty payload assembly.

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https://www.satcat.com/sats-embedded/12850?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

12850, 1981-069F

Orbit

GEO

Country

CIS

Related business

Russian Strategic Rocket Forces (RU)

Manufacturer

NPO Energiya

Mission

Spacecraft

Bus & Motor

BLOK DM, Unknown motor

Mass

2,440 kg wet, 2,440 kg dry

Launch date (UTC)

1981-07-30 (44 years ago)

Launch vehicle

Unknown

Launch site

Tyuratam Missile And Space Complex (TTMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl, 3.1 m

Radar Cross Section

23.597 m², Large (>1 m²)

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Last TLE update: 23 hours ago

TLE from 23 hours ago

0 SL-12 R/B(2)
1 12850U 81069F   25259.33662817 -.00000148  00000-0  00000-0 0  9993
2 12850   8.7739 301.8889 0022028 185.6882 183.2267  0.97701167113553

Epoch: 2025-09-16T08:04Z

TLE epoch observation values (Epoch: 2025-09-16T08:04:44.673Z)

Latitude

1.35608°

Longitude

-166.01062°

Altitude

36,616.813 km

Speed

3.042 km/s

True Right ascension

20h 42m 48s

True Declination

1° 21' 17"

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

23:20:12

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

36,618.509 km

Perigee altitude

36,429.5 km

Semi-major axis

42,902.141 km

Eccentricity

0.0022

Inclination

8.7739°

RAAN

301.8889°

Arg. of periapsis

185.6882°

True anomaly

183.21253°

Mean anomaly

183.2267°

Eccentric anomaly

183.21961°

Mean motion

0.24424 °/min

Orbital period

1,473.93 mins

BSTAR

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Computing Atmospheric mass density...

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Other satellites on launch #69 in the year 1981 (1981-07-30 UTC)

RADUGA 9, 12618

SL-12 R/B(1), 12619 (Decayed)

SL-12 PLAT, 12620 (Decayed)

SL-12 R/B(AUX MOTOR), 12633 (Decayed)

SL-12 R/B(AUX MOTOR), 12634 (Decayed)

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SL-12 R/B(2) 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.
181 mins	2025-09-17 12:07:52.605Z	264.281° W	2025-09-17 13:43:52.605Z	265.496° W	10.371°	2025-09-17 15:08:52.605Z	265.536° W

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12850 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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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out SL-12 R/B(2), 12850 on other resources

View SL-12 R/B(2), 12850 on Heavens-Above

View SL-12 R/B(2), 12850 on Keep Track

View SL-12 R/B(2), 12850 on Celestrak

View SL-12 R/B(2), 12850 on Gunter's Space Page

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

SL-12 R/B(2), 12850

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 23 hours ago

TLE from 23 hours ago

TLE epoch observation values (Epoch: 2025-09-16T08:04:44.673Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #69 in the year 1981 (1981-07-30 UTC)

SL-12 R/B(2) Visibility forecast

12850 neighbors

Co-orbital & Co-planar RSOs

Check out SL-12 R/B(2), 12850 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 23 hours ago