SL-12 R/B(2), 18634

Orbit data source: Space-Track

SL-12 R/B(2), 18634 is space debris in GEO originally from a launch on Thu, 10 Dec 1987 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.

Not visible in the next 10 days

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Iframe URL

https://www.satcat.com/sats-embedded/18634?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

18634, 1987-100D

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)

1987-12-10 (38 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: 1 day ago

TLE from 1 day ago

0 SL-12 R/B(2)
1 18634U 87100D   25261.00610657 -.00000070  00000-0  00000-0 0  9997
2 18634  10.1648 321.6278 0017751 259.3589 113.1039  1.03399881142664

Epoch: 2025-09-18T00:08Z

TLE epoch observation values (Epoch: 2025-09-18T00:08:47.607Z)

Latitude

2.21379°

Longitude

-25.27094°

Altitude

34,960.276 km

Speed

3.104 km/s

True Right ascension

22h 16m 24s

True Declination

2° 12' 41"

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

18:28:56

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

35,006.231 km

Perigee altitude

34,859.569 km

Semi-major axis

41,311.037 km

Eccentricity

0.00178

Inclination

10.1648°

RAAN

321.6278°

Arg. of periapsis

259.3589°

True anomaly

113.29083°

Mean anomaly

113.1039°

Eccentric anomaly

113.19738°

Mean motion

0.25849 °/min

Orbital period

1,392.7 mins

BSTAR

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Other satellites on launch #100 in the year 1987 (1987-12-10 UTC)

RADUGA 21, 18631

SL-12 R/B(1), 18632 (Decayed)

SL-12 PLAT, 18633 (Decayed)

SL-12 R/B(AUX MOTOR), 18635 (Decayed)

SL-12 R/B(AUX MOTOR), 18636 (Decayed)

SL-12 DEB *, 21620 (Decayed)

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SL-12 R/B(2) Visibility

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18634 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), 18634 on other resources

View SL-12 R/B(2), 18634 on Heavens-Above

View SL-12 R/B(2), 18634 on Keep Track

View SL-12 R/B(2), 18634 on Celestrak

View SL-12 R/B(2), 18634 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), 18634

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2025-09-18T00:08:47.607Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #100 in the year 1987 (1987-12-10 UTC)

SL-12 R/B(2) Visibility

18634 neighbors

Co-orbital & Co-planar RSOs

Check out SL-12 R/B(2), 18634 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 1 day ago