IUS R/B(1), 21640

Orbit data source: Space-Track

IUS R/B(1), 21640 is space debris in HEO originally from a launch on Fri, 02 Aug 1991 UTC launched from the Air Force Eastern Test Range (AFETR). 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/21640?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21640, 1991-054C

Orbit

HEO

Last TLE update

12 hours ago

Origin

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

UTC CSD

Mission

Spacecraft

Bus & Motor

ORBUS 21, Unknown motor

Mass

1,164 kg wet, ~1,164 kg dry

Launch date (UTC)

1991-08-02 (34 years ago)

Launch vehicle

Unknown

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl, Unknown HBR

Radar Cross Section

7.708 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 12 hours ago

0 IUS R/B(1)
1 21640U 91054C   25214.18224066  .00008554  00000-0  16868-2 0  9998
2 21640  26.4019 207.0508 6669426 292.5918  12.2166  3.08745548330091

Epoch: 2025-08-02T04:22Z

TLE epoch observation values (Epoch: 2025-08-02T04:22:25.593Z)

Latitude

-0.00053°

Longitude

-169.57693°

Altitude

2,423.539 km

Speed

8.4 km/s

True Right ascension

13h 48m 12s

True Declination

0° 00' 02"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

22.67246°

Longitude

-47.08408°

Altitude

26,352.821 km

Speed

2.086 km/s

Apparent Right ascension

21h 29m 11s

Apparent Declination

14° 28' 35"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

06:04:53

Azimuth

307.698° NW

Elevation

-17.832°

Doppler factor

Orbital elements

Apogee altitude

26,837.116 km

Perigee altitude

258.316 km

Semi-major axis

19,925.853 km

Eccentricity

0.66694

Inclination

26.4019°

RAAN

207.0508°

Arg. of periapsis

292.5918°

True anomaly

67.17425°

Mean anomaly

12.2166°

Eccentric anomaly

33.06553°

Mean motion

0.77165 °/min

Orbital period

466.54 mins

BSTAR

0.0016868

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Other satellites on launch #54 in the year 1991 (1991-08-02 UTC)

STS 43, 21638 (Decayed)

TDRS 5, 21639

IUS R/B(2), 21641

IUS DEB, 21642 (Decayed)

IUS R/B(1) Visibility forecast

Observer location: undefined°, undefined°

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.
406 mins	2025-08-03 03:51:19.138Z	237.962° WSW	2025-08-03 05:32:19.138Z	160.597° S	43.518°	2025-08-03 10:37:19.138Z	142.616° SSE

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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Authenticating...

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Check out IUS R/B(1), 21640 on other resources

View IUS R/B(1), 21640 on Heavens-Above

View IUS R/B(1), 21640 on Keep Track

View IUS R/B(1), 21640 on Celestrak

View IUS R/B(1), 21640 on Gunter's Space Page

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