SL-6 R/B(2), 25850

Orbit data source: Space-Track

SL-6 R/B(2), 25850 is space debris in HEO originally from a launch on Thu, 08 Jul 1999 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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https://www.satcat.com/sats-embedded/25850?theme=dark&initialShowStats=false

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Identifier

25850, 1999-036D

Orbit

HEO

Country

CIS

Related business

Russian Strategic Rocket Forces (RU)

Manufacturer

RKKE

Mission

Spacecraft

Bus & Motor

BLOK-L, Unknown motor

Mass

900 kg wet, 900 kg dry

Launch date (UTC)

1999-07-08 (27 years ago)

Launch vehicle

Unknown

Launch site

Plesetsk Missile And Space Complex (PKMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl, Unknown HBR

Radar Cross Section

7.882 m², Large (>1 m²)

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

TLE from 6 days ago

0 SL-6 R/B(2)
1 25850U 99036D   26126.08113728 -.00000777  00000-0  00000-0 0  9996
2 25850  63.7580 207.8336 6863577 282.0404  14.0961  1.96707027192521

Epoch: 2026-05-06T01:56Z

TLE epoch observation values (Epoch: 2026-05-06T01:56:50.260Z)

Latitude

-0.00014°

Longitude

-45.34529°

Altitude

6,099.097 km

Speed

7.006 km/s

True Right ascension

13h 51m 14s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow 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

22:30:18

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

38,994.187 km

Perigee altitude

2,060.571 km

Semi-major axis

26,905.516 km

Eccentricity

0.68636

Inclination

63.758°

RAAN

207.8336°

Arg. of periapsis

282.0404°

True anomaly

78.25749°

Mean anomaly

14.0961°

Eccentric anomaly

38.66557°

Mean motion

0.49179 °/min

Orbital period

732.02 mins

BSTAR

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Other satellites on launch #36 in the year 1999 (1999-07-08 UTC)

MOLNIYA 3-50, 25847

SL-6 PLAT, 25849 (Decayed)

SL-6 R/B(1), 25848 (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.
43 mins	2026-05-11 14:13:15.928Z	107.141° ESE	2026-05-11 14:13:15.928Z	107.141° ESE	33.931°	2026-05-11 14:56:15.928Z	129.182° SE
167 mins	2026-05-11 19:28:15.928Z	339.91° N	2026-05-11 20:49:15.928Z	338.195° N	12.56°	2026-05-11 22:15:15.928Z	335.661° NNW
594 mins	2026-05-12 04:19:15.928Z	157.919° S	2026-05-12 05:19:15.928Z	74.394° E	41.074°	2026-05-12 14:13:15.928Z	100.396° ESE

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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), 25850 on other resources

View SL-6 R/B(2), 25850 on Heavens-Above

View SL-6 R/B(2), 25850 on Keep Track

View SL-6 R/B(2), 25850 on Celestrak

View SL-6 R/B(2), 25850 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), 25850

Orbit data source: Space-Track

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

TLE from 6 days ago

TLE epoch observation values (Epoch: 2026-05-06T01:56:50.260Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #36 in the year 1999 (1999-07-08 UTC)

SL-6 R/B(2) Visibility forecast

Co-orbital & Co-planar RSOs

Check out SL-6 R/B(2), 25850 on other resources

Documentation

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