DELTA 4 R/B, 27555

Orbit data source: Space-Track

DELTA 4 R/B, 27555 is space debris in HEO originally from a launch on Wed, 20 Nov 2002 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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https://www.satcat.com/sats-embedded/27555?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

27555, 2002-051B

Orbit

HEO

Country

Related business

Boeing (US)

Manufacturer

ULA Decatur

Mission

Spacecraft

Bus & Motor

DCSS-4, RL10B-2

Mass

2,850 kg wet, 2,850 kg dry

Launch date (UTC)

2002-11-20 (23 years ago)

Launch vehicle

Unknown

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl + 1 Nozzle, 6.0 m

Radar Cross Section

43.982 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 11 hours ago

TLE from 11 hours ago

0 DELTA 4 R/B
1 27555U 02051B   26101.10808733 -.00000061  00000-0  10348-3 0  9999
2 27555  13.8966  50.6344 7125289 191.3332 134.1650  2.35969734201312

Epoch: 2026-04-11T02:35Z

TLE epoch observation values (Epoch: 2026-04-11T02:35:38.745Z)

Latitude

-0.00001°

Longitude

172.36659°

Altitude

32,569.211 km

Speed

1.935 km/s

True Right ascension

03h 22m 26s

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

20:02:11

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

34,443.606 km

Perigee altitude

474.344 km

Semi-major axis

23,837.112 km

Eccentricity

0.71253

Inclination

13.8966°

RAAN

50.6344°

Arg. of periapsis

191.3332°

True anomaly

168.68553°

Mean anomaly

134.165°

Eccentric anomaly

152.8159°

Mean motion

0.58974 °/min

Orbital period

610.44 mins

BSTAR

0.00010348

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Other satellites on launch #51 in the year 2002 (2002-11-20 UTC)

DELTA 4 DEB, 27771 (Decayed)

EUTE 25C (EUTE W5), 27554

DELTA 4 DEB, 27563 (Decayed)

DELTA 4 DEB, 27695 (Decayed)

DELTA 4 DEB, 27564 (Decayed)

DELTA 4 DEB, 27697 (Decayed)

DELTA 4 DEB, 27696 (Decayed)

DELTA 4 DEB, 27565 (Decayed)

DELTA 4 DEB, 27694 (Decayed)

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DELTA 4 R/B 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.
543 mins	2026-04-11 20:01:30.748Z	219.125° SW	2026-04-11 22:45:30.748Z	218.481° SW	29.845°	2026-04-12 05:04:30.748Z	157.846° S

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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 DELTA 4 R/B, 27555 on other resources

View DELTA 4 R/B, 27555 on Heavens-Above

View DELTA 4 R/B, 27555 on Keep Track

View DELTA 4 R/B, 27555 on Celestrak

View DELTA 4 R/B, 27555 on Gunter's Space Page

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

DELTA 4 R/B, 27555

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 11 hours ago

TLE from 11 hours ago

TLE epoch observation values (Epoch: 2026-04-11T02:35:38.745Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #51 in the year 2002 (2002-11-20 UTC)

DELTA 4 R/B Visibility forecast

Co-orbital & Co-planar RSOs

Check out DELTA 4 R/B, 27555 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 11 hours ago