SL-6 R/B(2), 15439

Orbit data source: Space-Track

SL-6 R/B(2), 15439 is space debris originally from a launch on Fri, 14 Dec 1984 UTC launched from the Plesetsk Missile And Space Complex (PKMTR). 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/15439?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

15439, 1984-124H

Orbit

Molniya

Country

CIS

Related business

Russian Strategic Rocket Forces (RU)

Manufacturer

NPO Energiya

Mission

Spacecraft

Bus & Motor

BLOK-L, Unknown motor

Mass

900 kg wet, 900 kg dry

Launch date (UTC)

1984-12-14 (41 years ago)

Launch vehicle

Unknown

Launch site

Plesetsk Missile And Space Complex (PKMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 5 days ago

TLE from 5 days ago

0 SL-6 R/B(2)
1 15439U 84124H   26125.92291186 -.00000980  00000-0 -55537-4 0  9993
2 15439  62.8927   1.4549 7470178 257.4486  17.5469  1.96385430253899

Epoch: 2026-05-05T22:08Z

TLE epoch observation values (Epoch: 2026-05-05T22:08:59.584Z)

Latitude

0.0001°

Longitude

165.49203°

Altitude

7,859.09 km

Speed

6.419 km/s

True Right ascension

00h 06m 07s

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

23:51:23

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

40,677.285 km

Perigee altitude

435.866 km

Semi-major axis

26,934.713 km

Eccentricity

0.74702

Inclination

62.8927°

RAAN

1.4549°

Arg. of periapsis

257.4486°

True anomaly

102.3793°

Mean anomaly

17.5469°

Eccentric anomaly

50.63924°

Mean motion

0.49099 °/min

Orbital period

733.21 mins

BSTAR

-0.000055537

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Other satellites on launch #124 in the year 1984 (1984-12-14 UTC)

SL-6 DEB, 15438 (Decayed)

SL-6 PLAT, 15431 (Decayed)

MOLNIYA 1-63, 15429

SL-6 R/B(1), 15430 (Decayed)

SL-6 DEB, 15437 (Decayed)

SL-6 DEB, 15435 (Decayed)

SL-6 DEB, 15436 (Decayed)

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SL-6 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.
453 mins	2026-05-10 15:38:03.848Z	51.498° ENE	2026-05-10 18:02:03.848Z	33.586° NE	39.412°	2026-05-10 23:11:03.848Z	93.146° ESE
176 mins	2026-05-11 12:42:03.848Z	113.364° SE	2026-05-11 15:38:03.848Z	55.424° ENE	39.33°	2026-05-11 15:38:03.848Z	55.424° ENE

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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-6 R/B(2), 15439 on other resources

View SL-6 R/B(2), 15439 on Heavens-Above

View SL-6 R/B(2), 15439 on Keep Track

View SL-6 R/B(2), 15439 on Celestrak

View SL-6 R/B(2), 15439 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-6 R/B(2), 15439

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 5 days ago

TLE from 5 days ago

TLE epoch observation values (Epoch: 2026-05-05T22:08:59.584Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #124 in the year 1984 (1984-12-14 UTC)

SL-6 R/B(2) Visibility forecast

Co-orbital & Co-planar RSOs

Check out SL-6 R/B(2), 15439 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 5 days ago