DELTA 1 DEB, 12539

Orbit data source: Space-Track

DELTA 1 DEB, 12539 is space debris in SSO 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/12539?theme=dark&initialShowStats=false

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Identifier

12539, 1976-077DU

Orbit

SSO

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, 0.052 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

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Last TLE update: 1 day ago

TLE from 1 day ago

0 DELTA 1 DEB
1 12539U 76077DU  26302.76700767 -.00001349  00000-0 -43833-2 0  9992
2 12539 101.7047 224.0888 0359278  19.1624   6.1320 12.79613587146700

Epoch: 2026-10-29T18:24Z

TLE epoch observation values (Epoch: 2026-10-29T18:24:29.462Z)

Latitude

25.21344°

Longitude

-95.69962°

Altitude

1,070.071 km

Speed

7.449 km/s

True Right ascension

14h 34m 04s

True Declination

25° 05' 12"

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

16:41:13

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,617.839 km

Perigee altitude

1,063.21 km

Semi-major axis

7,718.662 km

Eccentricity

0.03593

Inclination

101.7047°

RAAN

224.0888°

Arg. of periapsis

19.1624°

True anomaly

6.59229°

Mean anomaly

6.132°

Eccentric anomaly

6.36003°

Mean motion

3.20059 °/min

Orbital period

112.48 mins

BSTAR

-0.0043833

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

DELTA 1 DEB *, 18466 (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	2026-10-31 06:32:55.772Z	42.554° NE	2026-10-31 06:38:55.772Z	92.264° ESE	28.422°	2026-10-31 06:45:55.772Z	149.847° SSE
15 mins	2026-10-31 08:23:55.772Z	8.716° NNE	2026-10-31 08:29:55.772Z	299.775° NW	65.991°	2026-10-31 08:38:55.772Z	212.99° SW
6 mins	2026-10-31 10:16:55.772Z	329.334° NNW	2026-10-31 10:18:55.772Z	313.384° NW	15.14°	2026-10-31 10:22:55.772Z	283.406° WNW
8 mins	2026-10-31 17:21:55.772Z	98.279° ESE	2026-10-31 17:24:55.772Z	63.614° ENE	25.476°	2026-10-31 17:29:55.772Z	9.543° NNE
11 mins	2026-10-31 19:10:55.772Z	184.888° SSW	2026-10-31 19:15:55.772Z	270.483° WNW	54.154°	2026-10-31 19:21:55.772Z	333.694° 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, 12539 on other resources

View DELTA 1 DEB, 12539 on Heavens-Above

View DELTA 1 DEB, 12539 on Keep Track

View DELTA 1 DEB, 12539 on Celestrak

View DELTA 1 DEB, 12539 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, 12539

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: 2026-10-29T18:24:29.462Z)

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, 12539 on other resources

Documentation

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