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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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

Small (<0.1 m²)

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Last TLE update: 1 day ago

TLE from 1 day ago

0 DELTA 1 DEB
1 13539U 76077EM  26131.15236196  .00000017  00000-0  75807-3 0  9992
2 13539 101.8769 208.8810 0413656 122.9360 270.7379 11.65466033949440

Epoch: 2026-05-11T03:39Z

TLE epoch observation values (Epoch: 2026-05-11T03:39:24.073Z)

Latitude

28.30094°

Longitude

-81.38626°

Altitude

1,852.066 km

Speed

6.959 km/s

True Right ascension

13h 29m 38s

True Declination

28° 10' 36"

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

18:29:21

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

2,176.764 km

Perigee altitude

1,497.121 km

Semi-major axis

8,215.079 km

Eccentricity

0.04137

Inclination

101.8769°

RAAN

208.881°

Arg. of periapsis

122.936°

True anomaly

266.00039°

Mean anomaly

270.7379°

Eccentric anomaly

268.36879°

Mean motion

2.91491 °/min

Orbital period

123.5 mins

BSTAR

0.00075807

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

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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.
14 mins	2026-05-12 17:14:02.214Z	34.5° NE	2026-05-12 17:21:02.214Z	103.253° ESE	33.793°	2026-05-12 17:28:02.214Z	166.077° S
13 mins	2026-05-12 19:16:02.214Z	359.134° N	2026-05-12 19:22:02.214Z	298.466° NW	33.614°	2026-05-12 19:29:02.214Z	235.008° WSW
13 mins	2026-05-13 03:03:02.214Z	100.12° ESE	2026-05-13 03:09:02.214Z	58.382° ENE	23.507°	2026-05-13 03:16:02.214Z	5.133° NNE
17 mins	2026-05-13 05:01:02.214Z	165.744° S	2026-05-13 05:10:02.214Z	275.351° WNW	44.535°	2026-05-13 05:18:02.214Z	339.917° N
8 mins	2026-05-13 07:08:02.214Z	244.167° WSW	2026-05-13 07:12:02.214Z	270.249° WNW	15.222°	2026-05-13 07:16:02.214Z	297.137° NW

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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: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2026-05-11T03:39:24.073Z)

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: 1 day ago