SL-12 R/B(2), 21019

Orbit data source: Space-Track

SL-12 R/B(2), 21019 is space debris in GEO originally from a launch on Thu, 20 Dec 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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Iframe URL

https://www.satcat.com/sats-embedded/21019?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21019, 1990-112D

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)

1990-12-20 (35 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: 7 hours ago

TLE from 7 hours ago

0 SL-12 R/B(2)
1 21019U 90112D   26071.19641120 -.00000128  00000-0  00000-0 0  9998
2 21019  12.9821 338.7583 0024569 182.2472 344.4700  1.00013000118969

Epoch: 2026-03-12T04:42Z

TLE epoch observation values (Epoch: 2026-03-12T04:42:49.927Z)

Latitude

2.97678°

Longitude

-94.80806°

Altitude

35,758.134 km

Speed

3.079 km/s

True Right ascension

09h 42m 59s

True Declination

2° 58' 26"

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

16:13:45

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

35,964.063 km

Perigee altitude

35,756.512 km

Semi-major axis

42,238.425 km

Eccentricity

0.00246

Inclination

12.9821°

RAAN

338.7583°

Arg. of periapsis

182.2472°

True anomaly

344.3944°

Mean anomaly

344.47°

Eccentric anomaly

344.43222°

Mean motion

0.25002 °/min

Orbital period

1,439.86 mins

BSTAR

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Other satellites on launch #112 in the year 1990 (1990-12-20 UTC)

SL-12 R/B(1), 21017 (Decayed)

SL-12 R/B(AUX MOTOR), 21025 (Decayed)

RADUGA 26, 21016

SL-12 R/B(AUX MOTOR), 21024 (Decayed)

SL-12 PLAT, 21018 (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	2026-03-12 11:53:39.433Z	167.655° S	2026-03-12 23:31:39.433Z	161.094° S	40.062°	2026-03-13 11:53:39.433Z	168.771° S

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21019 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), 21019 on other resources

View SL-12 R/B(2), 21019 on Heavens-Above

View SL-12 R/B(2), 21019 on Keep Track

View SL-12 R/B(2), 21019 on Celestrak

View SL-12 R/B(2), 21019 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), 21019

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 7 hours ago

TLE from 7 hours ago

TLE epoch observation values (Epoch: 2026-03-12T04:42:49.927Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #112 in the year 1990 (1990-12-20 UTC)

SL-12 R/B(2) Visibility forecast

21019 neighbors

Co-orbital & Co-planar RSOs

Check out SL-12 R/B(2), 21019 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 7 hours ago