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.

Loading next visibility...

Iframe embed code

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

Optional Secondary NORAD IDs

Max 10 NORAD IDs; Separated by commas

Initial load time (optional)

ISO8601 Format

TLE date request (optional)

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: 1 day ago

TLE from 1 day ago

0 SL-12 R/B(2)
1 18387U 87084D   26057.52462362  .00000102  00000-0  00000+0 0  9996
2 18387  11.1039 327.3851 0029058 250.6095 328.1476  1.00049388147662

Epoch: 2026-02-26T12:35Z

TLE epoch observation values (Epoch: 2026-02-26T12:35:27.480Z)

Latitude

-6.89661°

Longitude

-159.75892°

Altitude

35,745.74 km

Speed

3.08 km/s

True Right ascension

12h 21m 55s

True Declination

-6° 53' 23"

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

02:13:36

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

35,972.774 km

Perigee altitude

35,727.361 km

Semi-major axis

42,228.204 km

Eccentricity

0.00291

Inclination

11.1039°

RAAN

327.3851°

Arg. of periapsis

250.6095°

True anomaly

327.97133°

Mean anomaly

328.1476°

Eccentric anomaly

328.05952°

Mean motion

0.25011 °/min

Orbital period

1,439.34 mins

BSTAR

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

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

SL-12 PLAT, 18386 (Decayed)

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

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

COSMOS 1888, 18384

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

Did you know?

You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

Click here to try in Sandbox

SL-12 R/B(2) Visibility forecast

Loading observer location...
Set Observer location

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.
895 mins	2026-02-27 22:42:58.984Z	247.506° W	2026-02-28 04:17:58.984Z	255.342° W	23.421°	2026-02-28 13:37:58.984Z	240.039° WSW
303 mins	2026-02-28 17:39:58.984Z	238.489° WSW	2026-02-28 22:42:58.984Z	248.168° W	17.928°	2026-02-28 22:42:58.984Z	248.168° W

Items per page:

1–2 of 2 items

of 1 page

Loading historical data...

18387 neighbors

Authenticating...

Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

Please sign-in to view Co-orbital & Co-planar RSOs.

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

Authenticating...

Click to sort rows by Secondary header in ascending order	Click to sort rows by Secondary name header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Owner header in ascending order	Click to sort rows by Obj. Type header in ascending order	Click to sort rows by Miss dist. header in ascending order	Click to sort rows by Rel. speed header in ascending order	Click to sort rows by Apr. angle header in ascending order	Click to sort rows by TCA header in descending order

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: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2026-02-26T12:35:27.480Z)

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: 1 day ago