SL-12 R/B(2), 18387

Orbit data source: Space-Track

SL-12 R/B(2), 18387 is space debris in GEO originally from a launch on Thu, 01 Oct 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.

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https://www.satcat.com/sats-embedded/18387?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

18387, 1987-084D

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)

1987-10-01 (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)

Expand to show TLE details & history
Last TLE update: 10 hours ago

TLE from 10 hours ago

0 SL-12 R/B(2)
1 18387U 87084D   25319.39717889 -.00000268  00000-0  00000+0 0  9992
2 18387  11.2497 328.0414 0030972 246.0289 272.3339  1.00038425146639

Epoch: 2025-11-15T09:31Z

TLE epoch observation values (Epoch: 2025-11-15T09:31:56.256Z)

Latitude

4.1825°

Longitude

-71.29143°

Altitude

35,846.584 km

Speed

3.073 km/s

True Right ascension

08h 25m 40s

True Declination

4° 10' 42"

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

16:25:31

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

35,983.949 km

Perigee altitude

35,722.352 km

Semi-major axis

42,231.288 km

Eccentricity

0.0031

Inclination

11.2497°

RAAN

328.0414°

Arg. of periapsis

246.0289°

True anomaly

271.97923°

Mean anomaly

272.3339°

Eccentric anomaly

272.15657°

Mean motion

0.25009 °/min

Orbital period

1,439.5 mins

BSTAR

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Other satellites on launch #84 in the year 1987 (1987-10-01 UTC)

COSMOS 1888, 18384

SL-12 R/B(1), 18385 (Decayed)

SL-12 R/B(AUX MOTOR), 18388 (Decayed)

SL-12 R/B(AUX MOTOR), 18420 (Decayed)

SL-12 PLAT, 18386 (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.
1440 mins	2025-11-15 19:45:24.854Z	138.707° SSE	2025-11-16 04:51:24.854Z	125.343° SE	34.202°	2025-11-16 19:45:24.854Z	139.55° SSE

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18387 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), 18387 on other resources

View SL-12 R/B(2), 18387 on Heavens-Above

View SL-12 R/B(2), 18387 on Keep Track

View SL-12 R/B(2), 18387 on Celestrak

View SL-12 R/B(2), 18387 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), 18387

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 10 hours ago

TLE from 10 hours ago

TLE epoch observation values (Epoch: 2025-11-15T09:31:56.256Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #84 in the year 1987 (1987-10-01 UTC)

SL-12 R/B(2) Visibility forecast

18387 neighbors

Co-orbital & Co-planar RSOs

Check out SL-12 R/B(2), 18387 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 10 hours ago