DELTA 1 DEB, 13539

Orbit data source: Space-Track

DELTA 1 DEB, 13539 is space debris in LEO originally from a launch on Thu, 29 Jul 1976 UTC launched from the Air Force Western Test Range (AFWTR). 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/13539?theme=dark&initialShowStats=false

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Identifier

13539, 1976-077EM

Orbit

LEO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

Unknown

Mission

Spacecraft

Bus & Motor

Unknown

Mass

Unknown

Launch date (UTC)

1976-07-29 (50 years ago)

Launch vehicle

Unknown

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown shape, 1.1 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 2 days ago

TLE from 2 days ago

0 DELTA 1 DEB
1 13539U 76077EM  26171.15118454 -.00000209  00000-0 -26500-2 0  9992
2 13539 101.8787 242.7657 0410944  58.1917 332.5750 11.65460706954101

Epoch: 2026-06-20T03:37Z

TLE epoch observation values (Epoch: 2026-06-20T03:37:42.344Z)

Latitude

27.87238°

Longitude

-86.38615°

Altitude

1,545.67 km

Speed

7.223 km/s

True Right ascension

15h 45m 38s

True Declination

27° 44' 41"

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

00:54:27

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

2,174.562 km

Perigee altitude

1,499.373 km

Semi-major axis

8,215.104 km

Eccentricity

0.04109

Inclination

101.8787°

RAAN

242.7657°

Arg. of periapsis

58.1917°

True anomaly

330.30325°

Mean anomaly

332.575°

Eccentric anomaly

331.4497°

Mean motion

2.9149 °/min

Orbital period

123.5 mins

BSTAR

-0.00265

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Other satellites on launch #77 in the year 1976 (1976-07-29 UTC)

DELTA 1 DEB, 12541 (Decayed)

DELTA 1 DEB, 10651 (Decayed)

DELTA 1 DEB, 14905

DELTA 1 DEB, 13535

DELTA 1 DEB, 13532

DELTA 1 DEB, 10753 (Decayed)

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DELTA 1 DEB 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.
13 mins	2026-06-22 15:52:52.938Z	48.492° ENE	2026-06-22 15:59:52.938Z	96.545° ESE	19.681°	2026-06-22 16:05:52.938Z	134.631° SE
17 mins	2026-06-22 17:53:52.938Z	16.459° NNE	2026-06-22 18:00:52.938Z	347.971° N	44.799°	2026-06-22 18:10:52.938Z	202.533° SW
11 mins	2026-06-22 19:56:52.938Z	342.357° N	2026-06-22 20:00:52.938Z	311.849° NW	20.42°	2026-06-22 20:07:52.938Z	265.229° W
14 mins	2026-06-23 03:41:52.938Z	132.575° SE	2026-06-23 03:48:52.938Z	61.524° ENE	37.64°	2026-06-23 03:55:52.938Z	354.124° N
13 mins	2026-06-23 05:43:52.938Z	205.197° SW	2026-06-23 05:49:52.938Z	257.685° W	28.939°	2026-06-23 05:56:52.938Z	321.505° NNW

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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 1 DEB, 13539 on other resources

View DELTA 1 DEB, 13539 on Heavens-Above

View DELTA 1 DEB, 13539 on Keep Track

View DELTA 1 DEB, 13539 on Celestrak

View DELTA 1 DEB, 13539 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 1 DEB, 13539

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2026-06-20T03:37:42.344Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #77 in the year 1976 (1976-07-29 UTC)

DELTA 1 DEB Visibility forecast

Co-orbital & Co-planar RSOs

Check out DELTA 1 DEB, 13539 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 2 days ago