DECAYED

SL-4 R/B, 63521 (Decayed)

Orbit data source: Space-Track

SL-4 R/B, 63521 was space debris in LEO originally from a launch on Tue, 08 Apr 2025 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/63521?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

63521, 2025-072B

Orbit

Decayed

Last TLE update

1 month ago

Origin

Russian Strategic Rocket Forces (CIS)

Manufacturer

TsSKB-Progress

Mission

Decayed spacecraft

Bus & Motor

BLOK-I, RD-0110

Mass

2,350 kg wet, 2,350 kg dry

Launch date (UTC)

2025-04-08 (1 month ago)

Launch vehicle

Unknown

Launch site

Tyuratam Missile And Space Complex (TTMTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl, 8.99 m

Radar Cross Section

21.560 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 1 month ago

0 SL-4 R/B
1 63521U 25072B   25099.97072997  .11558378  12466-4  66070-3 0  9991
2 63521  51.6521 283.9113 0007095  81.8811  43.3667 16.41802781   281

Epoch: 2025-04-09T23:17Z

Definitive object data (Epoch: 2025-04-09T23:17:51.069Z)

Latitude

39.93223°

Longitude

-125.18016°

Altitude

161.024 km

Speed

7.817 km/s

True Right ascension

04h 10m 55s

True Declination

39° 44' 51"

Sunlit

Object was in daylight at TLE epoch

Visualization observer readout

No trajectory is available.

Visualization observer readout

No trajectory is available.

Orbital elements

Apogee altitude

166.177 km

Perigee altitude

156.897 km

Semi-major axis

6,539.674 km

Eccentricity

0.0007095

Inclination

51.6521°

RAAN

283.9113°

Arg. of periapsis

81.8811°

True anomaly

43.42256°

Mean anomaly

43.3667°

Eccentric anomaly

43.39463°

Mean motion

4.10402 °/min

BSTAR

0.0006607

Orbital period

87.72 mins

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Other satellites on launch #72 in the year 2025 (2025-04-08 UTC)

SOYUZ MS-27, 63520

OBJECT C, 63522 (Decayed)

SL-4 R/B Visibility forecast

Observer location: undefined°, undefined°

This satellite is decayed

Authenticating...

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Check out SL-4 R/B, 63521 (Decayed) on other resources

View SL-4 R/B, 63521 (Decayed) on Celestrak

View SL-4 R/B, 63521 (Decayed) on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.