IUS R/B(1), 15544

Orbit data source: Space-Track

IUS R/B(1), 15544 is space debris in HEO originally from a launch on Thu, 24 Jan 1985 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 src="https://www.satcat.com/sats-embedded/15544?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/15544?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

15544, 1985-010C

Orbit

HEO

Country

Related business

United States Air Force (US)

Manufacturer

UTC CSD

Mission

Spacecraft

Bus & Motor

ORBUS 21, Unknown motor

Mass

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

Launch date (UTC)

1985-01-24 (41 years ago)

Launch vehicle

Unknown

Launch site

Air Force Eastern Test Range (AFETR)

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 IUS R/B(1)
1 15544U 85010C   26155.11948380  .00000351  00000-0  39718-3 0  9996
2 15544  27.8471  43.3465 6826117 306.3592   8.4178  2.83500391 71731

Epoch: 2026-06-04T02:52Z

TLE epoch observation values (Epoch: 2026-06-04T02:52:03.400Z)

Latitude

0.00072°

Longitude

107.75648°

Altitude

1,664.398 km

Speed

8.956 km/s

True Right ascension

02h 53m 21s

True Declination

0° 00' 03"

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

15:48:58

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

29,110.641 km

Perigee altitude

316.053 km

Semi-major axis

21,091.484 km

Eccentricity

0.68261

Inclination

27.8471°

RAAN

43.3465°

Arg. of periapsis

306.3592°

True anomaly

53.81571°

Mean anomaly

8.4178°

Eccentric anomaly

24.86017°

Mean motion

0.70857 °/min

Orbital period

508.07 mins

BSTAR

0.00039718

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Other satellites on launch #10 in the year 1985 (1985-01-24 UTC)

STS 51C, 15496 (Decayed)

IUS R/B(2), 15545

USA 8, 15543

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IUS R/B(1) 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.
136 mins	2026-06-09 05:39:00.147Z	267.217° W	2026-06-09 05:39:00.147Z	267.217° W	23.839°	2026-06-09 07:55:00.147Z	259.013° W
430 mins	2026-06-09 18:24:00.147Z	199.454° SSW	2026-06-09 18:43:00.147Z	131.15° SE	36.758°	2026-06-10 01:34:00.147Z	121.96° SE
84 mins	2026-06-10 04:15:00.147Z	286.441° WNW	2026-06-10 05:14:00.147Z	282.623° WNW	14.4°	2026-06-10 05:39:00.147Z	281.802° WNW

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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 IUS R/B(1), 15544 on other resources

View IUS R/B(1), 15544 on Heavens-Above

View IUS R/B(1), 15544 on Keep Track

View IUS R/B(1), 15544 on Celestrak

View IUS R/B(1), 15544 on Gunter's Space Page

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

IUS R/B(1), 15544

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: 2026-06-04T02:52:03.400Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #10 in the year 1985 (1985-01-24 UTC)

IUS R/B(1) Visibility forecast

Co-orbital & Co-planar RSOs

Check out IUS R/B(1), 15544 on other resources

Documentation

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