SL-12 R/B(2), 15581

Orbit data source: Space-Track

SL-12 R/B(2), 15581 is space debris in GEO originally from a launch on Thu, 21 Feb 1985 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.

Not visible in the next 10 days

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Iframe URL

https://www.satcat.com/sats-embedded/15581?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

15581, 1985-016F

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)

1985-02-21 (41 years ago)

Launch vehicle

Unknown

Launch site

Tyuratam Missile And Space Complex (TTMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Large (>1 m²)

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Last TLE update: 6 hours ago

TLE from 6 hours ago

0 SL-12 R/B(2)
1 15581U 85016F   26085.26897737  .00000019  00000-0  00000-0 0  9990
2 15581   9.7922 316.8245 0024888 257.3963  96.2861  0.99406070121107

Epoch: 2026-03-26T06:27Z

TLE epoch observation values (Epoch: 2026-03-26T06:27:19.644Z)

Latitude

-1.01271°

Longitude

30.35962°

Altitude

36,043.033 km

Speed

3.065 km/s

True Right ascension

20h 43m 38s

True Declination

-1° 00' 42"

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

18:06:38

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

36,137.616 km

Perigee altitude

35,926.515 km

Semi-major axis

42,410.202 km

Eccentricity

0.00249

Inclination

9.7922°

RAAN

316.8245°

Arg. of periapsis

257.3963°

True anomaly

96.56948°

Mean anomaly

96.2861°

Eccentric anomaly

96.4278°

Mean motion

0.24851 °/min

Orbital period

1,448.65 mins

BSTAR

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Other satellites on launch #16 in the year 1985 (1985-02-21 UTC)

COSMOS 1629, 15574

SL-12 R/B(AUX MOTOR), 15578 (Decayed)

SL-12 R/B(AUX MOTOR), 15577 (Decayed)

SL-12 PLAT, 15576 (Decayed)

SL-12 R/B(1), 15575 (Decayed)

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SL-12 R/B(2) Visibility

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15581 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), 15581 on other resources

View SL-12 R/B(2), 15581 on Heavens-Above

View SL-12 R/B(2), 15581 on Keep Track

View SL-12 R/B(2), 15581 on Celestrak

View SL-12 R/B(2), 15581 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), 15581

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 6 hours ago

TLE from 6 hours ago

TLE epoch observation values (Epoch: 2026-03-26T06:27:19.644Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #16 in the year 1985 (1985-02-21 UTC)

SL-12 R/B(2) Visibility

15581 neighbors

Co-orbital & Co-planar RSOs

Check out SL-12 R/B(2), 15581 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 6 hours ago