SL-12 R/B(2), 11571

Orbit data source: Space-Track

SL-12 R/B(2), 11571 is space debris in GEO originally from a launch on Tue, 20 Sep 1977 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/11571?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

11571, 1977-092G

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)

1977-09-20 (48 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)

Expand to show TLE details & history
Last TLE update: 10 hours ago

TLE from 10 hours ago

0 SL-12 R/B(2)
1 11571U 77092G   25255.76917985  .00000075  00000-0  00000-0 0  9993
2 11571   4.2432 273.6582 0010189 183.8062   9.9727  1.01283669120140

Epoch: 2025-09-12T18:27Z

TLE epoch observation values (Epoch: 2025-09-12T18:27:37.139Z)

Latitude

-1.02658°

Longitude

-161.49684°

Altitude

35,463.024 km

Speed

3.088 km/s

True Right ascension

07h 09m 40s

True Declination

-1° 01' 32"

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

21:22:11

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

35,549.036 km

Perigee altitude

35,463.684 km

Semi-major axis

41,884.497 km

Eccentricity

0.00102

Inclination

4.2432°

RAAN

273.6582°

Arg. of periapsis

183.8062°

True anomaly

9.99295°

Mean anomaly

9.9727°

Eccentric anomaly

9.98282°

Mean motion

0.2532 °/min

Orbital period

1,421.8 mins

BSTAR

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Computing Atmospheric mass density...

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Other satellites on launch #92 in the year 1977 (1977-09-20 UTC)

EKRAN 2, 10365

SL-12 R/B(1), 10366 (Decayed)

SL-12 PLAT, 10367 (Decayed)

SL-12 DEB, 10368 (Decayed)

SL-12 R/B(AUX MOTOR), 10408 (Decayed)

SL-12 R/B(AUX MOTOR), 10484 (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	2025-09-13 04:52:54.551Z	245.174° WSW	2025-09-13 12:02:54.551Z	248.164° W	20.356°	2025-09-14 04:52:54.551Z	242.478° WSW

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11571 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), 11571 on other resources

View SL-12 R/B(2), 11571 on Heavens-Above

View SL-12 R/B(2), 11571 on Keep Track

View SL-12 R/B(2), 11571 on Celestrak

View SL-12 R/B(2), 11571 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), 11571

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 10 hours ago

TLE from 10 hours ago

TLE epoch observation values (Epoch: 2025-09-12T18:27:37.139Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #92 in the year 1977 (1977-09-20 UTC)

SL-12 R/B(2) Visibility forecast

11571 neighbors

Co-orbital & Co-planar RSOs

Check out SL-12 R/B(2), 11571 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 10 hours ago