SL-12 R/B(2), 20502

Orbit data source: Space-Track

SL-12 R/B(2), 20502 is space debris in GEO originally from a launch on Thu, 15 Feb 1990 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/20502?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

20502, 1990-016D

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)

1990-02-15 (36 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)

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Last TLE update: 16 hours ago

TLE from 16 hours ago

0 SL-12 R/B(2)
1 20502U 90016D   26095.09125222 -.00000290  00000-0  00000-0 0  9992
2 20502  12.5379 335.6996 0040362 244.8925 305.8340  1.00023774132034

Epoch: 2026-04-05T02:11Z

TLE epoch observation values (Epoch: 2026-04-05T02:11:24.191Z)

Latitude

-2.24872°

Longitude

-60.42242°

Altitude

35,755.809 km

Speed

3.079 km/s

True Right ascension

11h 03m 19s

True Declination

-2° 14' 47"

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

00:27:01

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

36,027.731 km

Perigee altitude

35,686.79 km

Semi-major axis

42,235.397 km

Eccentricity

0.00404

Inclination

12.5379°

RAAN

335.6996°

Arg. of periapsis

244.8925°

True anomaly

305.45792°

Mean anomaly

305.834°

Eccentric anomaly

305.64607°

Mean motion

0.25005 °/min

Orbital period

1,439.71 mins

BSTAR

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Computing Atmospheric mass density...

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Other satellites on launch #16 in the year 1990 (1990-02-15 UTC)

RADUGA 25, 20499

SL-12 PLAT, 20501 (Decayed)

SL-12 R/B(AUX MOTOR), 20506 (Decayed)

SL-12 R/B(AUX MOTOR), 20507 (Decayed)

SL-12 R/B(1), 20500 (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	2026-04-05 18:31:12.484Z	112.857° SE	2026-04-06 18:31:12.484Z	113.677° SE	30.351°	2026-04-06 18:31:12.484Z	113.677° SE

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20502 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), 20502 on other resources

View SL-12 R/B(2), 20502 on Heavens-Above

View SL-12 R/B(2), 20502 on Keep Track

View SL-12 R/B(2), 20502 on Celestrak

View SL-12 R/B(2), 20502 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), 20502

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 16 hours ago

TLE from 16 hours ago

TLE epoch observation values (Epoch: 2026-04-05T02:11:24.191Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #16 in the year 1990 (1990-02-15 UTC)

SL-12 R/B(2) Visibility forecast

20502 neighbors

Co-orbital & Co-planar RSOs

Check out SL-12 R/B(2), 20502 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 16 hours ago