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.

Loading next visibility...

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/18550?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/18550?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

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

Unknown shape, 0.1 m

Radar Cross Section

Small (<0.1 m²)

Expand to show TLE details & history
Last TLE update: 14 hours ago

TLE from 14 hours ago

0 SL-16 DEB
1 18550U 87027F   26040.49446319  .00000125  00000-0  14544-3 0  9994
2 18550  71.0233  60.4135 0183834 261.8009  96.2210 13.79250345956378

Epoch: 2026-02-09T11:52Z

TLE epoch observation values (Epoch: 2026-02-09T11:52:01.619Z)

Latitude

0.00004°

Longitude

102.8183°

Altitude

985.987 km

Speed

7.35 km/s

True Right ascension

04h 01m 39s

True Declination

0° 00' 00"

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

04:21:37

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,099.486 km

Perigee altitude

829.521 km

Semi-major axis

7,342.641 km

Eccentricity

0.01838

Inclination

71.0233°

RAAN

60.4135°

Arg. of periapsis

261.8009°

True anomaly

98.30951°

Mean anomaly

96.221°

Eccentric anomaly

97.26583°

Mean motion

3.44957 °/min

Orbital period

104.36 mins

BSTAR

0.00014544

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

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

SL-16 DEB, 43323 (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-16 DEB 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.
4 mins	2026-02-10 02:01:24.976Z	63.456° ENE	2026-02-10 02:01:24.976Z	63.456° ENE	29.784°	2026-02-10 02:05:24.976Z	36.555° NE
11 mins	2026-02-10 03:41:24.976Z	245.425° WSW	2026-02-10 03:46:24.976Z	306.541° NW	29.84°	2026-02-10 03:52:24.976Z	7.577° NNE
9 mins	2026-02-10 11:04:24.976Z	6.725° NNE	2026-02-10 11:08:24.976Z	53.694° ENE	25.415°	2026-02-10 11:13:24.976Z	108.345° ESE
11 mins	2026-02-10 12:50:24.976Z	324.876° NNW	2026-02-10 12:55:24.976Z	259.775° W	39.161°	2026-02-10 13:01:24.976Z	178.892° S

Items per page:

1–4 of 4 items

of 1 page

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-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: 14 hours ago

TLE from 14 hours ago

TLE epoch observation values (Epoch: 2026-02-09T11:52:01.619Z)

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: 14 hours ago