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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ISO8601 Format

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 (49 years ago)

Launch vehicle

Unknown

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown shape, 0.1 m

Radar Cross Section

Small (<0.1 m²)

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

TLE from 1 day ago

0 DELTA 1 DEB
1 12539U 76077DU  26021.23664025 -.00001205  00000-0 -39519-2 0  9995
2 12539 101.7031 292.2781 0360930 228.9303 286.8764 12.78438895110709

Epoch: 2026-01-21T05:40Z

TLE epoch observation values (Epoch: 2026-01-21T05:40:45.717Z)

Latitude

27.60421°

Longitude

-87.33273°

Altitude

1,279.27 km

Speed

7.252 km/s

True Right ascension

07h 53m 51s

True Declination

27° 28' 22"

Sunlit

Object was in full shadow 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

11:38:40

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,624.015 km

Perigee altitude

1,066.495 km

Semi-major axis

7,723.392 km

Eccentricity

0.03609

Inclination

101.7031°

RAAN

292.2781°

Arg. of periapsis

228.9303°

True anomaly

282.86935°

Mean anomaly

286.8764°

Eccentric anomaly

284.87775°

Mean motion

3.19765 °/min

Orbital period

112.58 mins

BSTAR

-0.0039519

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

DELTA 1 DEB, 19858 (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.
15 mins	2026-01-22 16:39:58.458Z	125.72° SE	2026-01-22 16:46:58.458Z	66.681° ENE	34.984°	2026-01-22 16:54:58.458Z	356.191° N
16 mins	2026-01-22 18:29:58.458Z	188.912° SSW	2026-01-22 18:37:58.458Z	265.81° W	37.046°	2026-01-22 18:45:58.458Z	331.205° NNW
13 mins	2026-01-23 06:20:58.458Z	30.651° NE	2026-01-23 06:26:58.458Z	93.852° ESE	37.753°	2026-01-23 06:33:58.458Z	175.266° S
12 mins	2026-01-23 08:11:58.458Z	356.01° N	2026-01-23 08:17:58.458Z	295.121° NW	29.454°	2026-01-23 08:23:58.458Z	240.589° WSW

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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: 2026-01-21T05:40:45.717Z)

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