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 (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)

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Last TLE update: 6 days ago

TLE from 6 days ago

0 DELTA 1 DEB
1 12539U 76077DU  25332.69091549 -.00001137  00000-0 -35816-2 0  9994
2 12539 101.7008 236.8192 0383662 334.3041  76.6465 12.78578033103862

Epoch: 2025-11-28T16:34Z

TLE epoch observation values (Epoch: 2025-11-28T16:34:55.098Z)

Latitude

53.68604°

Longitude

-96.02326°

Altitude

1,298.235 km

Speed

7.239 km/s

True Right ascension

14h 42m 08s

True Declination

53° 32' 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

18:35:24

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,640.989 km

Perigee altitude

1,048.398 km

Semi-major axis

7,722.831 km

Eccentricity

0.03837

Inclination

101.7008°

RAAN

236.8192°

Arg. of periapsis

334.3041°

True anomaly

80.96786°

Mean anomaly

76.6465°

Eccentric anomaly

78.80288°

Mean motion

3.198 °/min

Orbital period

112.57 mins

BSTAR

-0.0035816

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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.
11 mins	2025-12-05 04:50:14.046Z	52.069° ENE	2025-12-05 04:56:14.046Z	93.163° ESE	16.715°	2025-12-05 05:01:14.046Z	126.981° SE
17 mins	2025-12-05 06:39:14.046Z	19.856° NNE	2025-12-05 06:47:14.046Z	93.215° ESE	44.609°	2025-12-05 06:56:14.046Z	194.63° SSW
13 mins	2025-12-05 08:31:14.046Z	351.219° N	2025-12-05 08:37:14.046Z	302.636° NW	25.074°	2025-12-05 08:44:14.046Z	252.916° W
7 mins	2025-12-05 15:39:14.046Z	74.94° E	2025-12-05 15:42:14.046Z	47.722° ENE	17.45°	2025-12-05 15:46:14.046Z	15.358° NNE
13 mins	2025-12-05 17:26:14.046Z	155.721° SSE	2025-12-05 17:31:14.046Z	88.265° E	44.745°	2025-12-05 17:39:14.046Z	344.403° N
7 mins	2025-12-05 19:20:14.046Z	244.085° WSW	2025-12-05 19:23:14.046Z	272.22° WNW	16.659°	2025-12-05 19:27:14.046Z	305.447° 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, 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: 6 days ago

TLE from 6 days ago

TLE epoch observation values (Epoch: 2025-11-28T16:34:55.098Z)

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: 6 days ago