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, 6.3 m

Radar Cross Section

43.982 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 1 month ago

TLE from 1 month ago

0 DELTA 4 R/B
1 39742U 14026B   26216.79135510 -.00000079  00000-0  00000+0 0  9992
2 39742  56.6324 341.2346 0014140 131.7914 228.3453  1.93898857 84010

Epoch: 2026-08-04T18:59Z

TLE epoch observation values (Epoch: 2026-08-04T18:59:33.080Z)

Latitude

-0.00004°

Longitude

102.97939°

Altitude

20,813.356 km

Speed

3.827 km/s

True Right ascension

22h 44m 53s

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

14:35:56

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

20,825.757 km

Perigee altitude

20,748.933 km

Semi-major axis

27,165.482 km

Eccentricity

0.00141

Inclination

56.6324°

RAAN

341.2346°

Arg. of periapsis

131.7914°

True anomaly

228.22438°

Mean anomaly

228.3453°

Eccentric anomaly

228.28482°

Mean motion

0.48475 °/min

Orbital period

742.65 mins

BSTAR

Loading maneuver chart data...

Computing Atmospheric mass density...

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

DELTA 4 DEB, 40006 (Decayed)

DELTA 4 DEB, 39754 (Decayed)

NAVSTAR 70 (USA 251), 39741

DELTA 4 DEB, 40007 (Decayed)

DELTA 4 DEB, 39755 (Decayed)

DELTA 4 DEB, 39756 (Decayed)

DELTA 4 DEB, 40005 (Decayed)

DELTA 4 DEB, 39758 (Decayed)

DELTA 4 DEB, 39760 (Decayed)

DELTA 4 DEB, 40008 (Decayed)

DELTA 4 DEB, 39759 (Decayed)

DELTA 4 DEB, 39757 (Decayed)

DELTA 4 DEB, 40003 (Decayed)

DELTA 4 DEB, 40004 (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.
127 mins	2026-09-15 01:55:51.241Z	85.42° E	2026-09-15 03:00:51.241Z	58.641° ENE	17.677°	2026-09-15 04:02:51.241Z	35.312° NE
297 mins	2026-09-15 15:43:51.241Z	313.877° NW	2026-09-15 18:12:51.241Z	270.572° WNW	57.81°	2026-09-15 20:40:51.241Z	204.371° SW

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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: 1 month ago

TLE from 1 month ago

TLE epoch observation values (Epoch: 2026-08-04T18:59:33.080Z)

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: 1 month ago