DELTA 4 R/B, 39742

Orbit data source: Space-Track

DELTA 4 R/B, 39742 is space debris in MEO originally from a launch on Sat, 17 May 2014 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/39742?theme=dark&initialShowStats=false

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Identifier

39742, 2014-026B

Orbit

MEO

Country

Related business

United Launch Alliance/Lockheed Martin (US)

Manufacturer

ULA Decatur

Mission

Spacecraft

Bus & Motor

DCSS-4, RL10B-2

Mass

2,850 kg wet, 2,850 kg dry

Launch date (UTC)

2014-05-17 (12 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: 18 hours ago

TLE from 18 hours ago

0 DELTA 4 R/B
1 39742U 14026B   26137.88593039 -.00000074  00000-0  00000+0 0  9993
2 39742  56.6551 344.0759 0013828 126.2773 233.8842  1.93898820 82487

Epoch: 2026-05-17T21:15Z

TLE epoch observation values (Epoch: 2026-05-17T21:15:44.385Z)

Latitude

-0.00002°

Longitude

149.56901°

Altitude

20,809.818 km

Speed

3.827 km/s

True Right ascension

22h 56m 20s

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

00:27:38

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

20,824.912 km

Perigee altitude

20,749.783 km

Semi-major axis

27,165.484 km

Eccentricity

0.00138

Inclination

56.6551°

RAAN

344.0759°

Arg. of periapsis

126.2773°

True anomaly

233.75632°

Mean anomaly

233.8842°

Eccentric anomaly

233.82025°

Mean motion

0.48475 °/min

Orbital period

742.65 mins

BSTAR

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Computing Atmospheric mass density...

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Other satellites on launch #26 in the year 2014 (2014-05-17 UTC)

DELTA 4 DEB, 39754 (Decayed)

DELTA 4 DEB, 40005 (Decayed)

DELTA 4 DEB, 39759 (Decayed)

DELTA 4 DEB, 40007 (Decayed)

DELTA 4 DEB, 39757 (Decayed)

DELTA 4 DEB, 40003 (Decayed)

DELTA 4 DEB, 40004 (Decayed)

DELTA 4 DEB, 40006 (Decayed)

DELTA 4 DEB, 39756 (Decayed)

NAVSTAR 70 (USA 251), 39741

DELTA 4 DEB, 39755 (Decayed)

DELTA 4 DEB, 40009 (Decayed)

DELTA 4 DEB, 39758 (Decayed)

DELTA 4 DEB, 39760 (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.
285 mins	2026-05-19 00:17:45.153Z	316.298° NNW	2026-05-19 02:40:45.153Z	272.953° WNW	38.755°	2026-05-19 05:02:45.153Z	209.942° SW
204 mins	2026-05-19 10:18:45.153Z	114.866° SE	2026-05-19 12:02:45.153Z	70.549° E	27.069°	2026-05-19 13:42:45.153Z	35.357° NE

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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, 39742 on other resources

View DELTA 4 R/B, 39742 on Heavens-Above

View DELTA 4 R/B, 39742 on Keep Track

View DELTA 4 R/B, 39742 on Celestrak

View DELTA 4 R/B, 39742 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, 39742

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 18 hours ago

TLE from 18 hours ago

TLE epoch observation values (Epoch: 2026-05-17T21:15:44.385Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #26 in the year 2014 (2014-05-17 UTC)

DELTA 4 R/B Visibility forecast

Co-orbital & Co-planar RSOs

Check out DELTA 4 R/B, 39742 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 18 hours ago