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 (40 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: 9 hours ago

TLE from 9 hours ago

0 SL-16 DEB
1 18550U 87027F   26310.56861756  .00000018  00000-0  53452-4 0  9991
2 18550  71.0243 246.3897 0182886 234.2123 124.1864 13.79309731993614

Epoch: 2026-11-06T13:38Z

TLE epoch observation values (Epoch: 2026-11-06T13:38:48.557Z)

Latitude

0.00006°

Longitude

-4.09895°

Altitude

1,045.835 km

Speed

7.291 km/s

True Right ascension

16h 25m 33s

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

18:14:40

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,098.575 km

Perigee altitude

830.01 km

Semi-major axis

7,342.43 km

Eccentricity

0.01829

Inclination

71.0243°

RAAN

246.3897°

Arg. of periapsis

234.2123°

True anomaly

125.89776°

Mean anomaly

124.1864°

Eccentric anomaly

125.04429°

Mean motion

3.44972 °/min

Orbital period

104.36 mins

BSTAR

0.000053452

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.
12 mins	2026-11-06 22:29:36.499Z	243.191° WSW	2026-11-06 22:35:36.499Z	304.262° NW	32.306°	2026-11-06 22:41:36.499Z	5.5° NNE
9 mins	2026-11-07 05:53:36.499Z	4.771° NNE	2026-11-07 05:57:36.499Z	53.793° ENE	29.73°	2026-11-07 06:02:36.499Z	111.849° ESE
10 mins	2026-11-07 07:39:36.499Z	322.524° NNW	2026-11-07 07:44:36.499Z	256.895° W	47.469°	2026-11-07 07:49:36.499Z	185.687° SSW
5 mins	2026-11-07 19:23:36.499Z	111.301° ESE	2026-11-07 19:25:36.499Z	92.77° ESE	14.125°	2026-11-07 19:28:36.499Z	66.684° ENE
12 mins	2026-11-07 21:05:36.499Z	199.35° SSW	2026-11-07 21:11:36.499Z	41.68° NE	81.075°	2026-11-07 21:17:36.499Z	23.885° NE

Items per page:

1–5 of 5 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: 9 hours ago

TLE from 9 hours ago

TLE epoch observation values (Epoch: 2026-11-06T13:38:48.557Z)

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: 9 hours ago