SL-16 DEB, 18550

Orbit data source: Space-Track

SL-16 DEB, 18550 is space debris in LEO originally from a launch on Wed, 18 Mar 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/18550?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

18550, 1987-027F

Orbit

LEO

Country

CIS

Related business

Russian Space Forces (RU)

Manufacturer

Yuzhnoe

Mission

Spacecraft

Bus & Motor

SEP MOTOR COVER, Unknown motor

Mass

~0 kg wet, ~1 kg dry

Launch date (UTC)

1987-03-18 (39 years ago)

Launch vehicle

Unknown

Launch site

Tyuratam Missile And Space Complex (TTMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

CONE, 0.1 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 8 hours ago

TLE from 8 hours ago

0 SL-16 DEB
1 18550U 87027F   26255.23486661  .00000085  00000-0  11141-3 0  9993
2 18550  71.0273 355.8136 0182754 312.8695  45.7181 13.79295322985981

Epoch: 2026-09-12T05:38Z

TLE epoch observation values (Epoch: 2026-09-12T05:38:12.475Z)

Latitude

0.00003°

Longitude

-79.98516°

Altitude

876.306 km

Speed

7.461 km/s

True Right ascension

23h 43m 15s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow 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

06:07:05

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,098.53 km

Perigee altitude

830.157 km

Semi-major axis

7,342.481 km

Eccentricity

0.01828

Inclination

71.0273°

RAAN

355.8136°

Arg. of periapsis

312.8695°

True anomaly

47.24147°

Mean anomaly

45.7181°

Eccentric anomaly

46.47736°

Mean motion

3.44968 °/min

Orbital period

104.36 mins

BSTAR

0.00011141

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Other satellites on launch #27 in the year 1987 (1987-03-18 UTC)

SL-16 DEB, 43323 (Decayed)

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SL-16 DEB 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.
11 mins	2026-09-12 16:37:15.156Z	358.906° N	2026-09-12 16:42:15.156Z	46.935° ENE	26.722°	2026-09-12 16:48:15.156Z	107.772° ESE
12 mins	2026-09-12 18:24:15.156Z	328.599° NNW	2026-09-12 18:30:15.156Z	241.89° WSW	62.418°	2026-09-12 18:36:15.156Z	174.129° S
10 mins	2026-09-13 07:52:15.156Z	188.373° SSW	2026-09-13 07:56:15.156Z	128.526° SE	68.613°	2026-09-13 08:02:15.156Z	28.4° NE
7 mins	2026-09-13 09:41:15.156Z	277.019° WNW	2026-09-13 09:44:15.156Z	313.011° NW	21.531°	2026-09-13 09:48:15.156Z	354.119° N

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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-16 DEB, 18550 on other resources

View SL-16 DEB, 18550 on Heavens-Above

View SL-16 DEB, 18550 on Keep Track

View SL-16 DEB, 18550 on Celestrak

View SL-16 DEB, 18550 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-16 DEB, 18550

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2026-09-12T05:38:12.475Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #27 in the year 1987 (1987-03-18 UTC)

SL-16 DEB Visibility forecast

Co-orbital & Co-planar RSOs

Check out SL-16 DEB, 18550 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 8 hours ago