DELTA 1 DEB, 21499

Orbit data source: Space-Track

DELTA 1 DEB, 21499 is space debris in SSO originally from a launch on Thu, 12 Jun 1975 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/21499?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21499, 1975-052FU

Orbit

SSO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

Unknown

Mission

Spacecraft

Bus & Motor

Unknown

Mass

Unknown

Launch date (UTC)

1975-06-12 (51 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: 1 day ago

TLE from 1 day ago

0 DELTA 1 DEB
1 21499U 75052FU  26126.35491729  .00001233  00000-0  22075-2 0  9998
2 21499  99.6166 259.9708 0128842   7.5961  49.6238 13.40682606688861

Epoch: 2026-05-06T08:31Z

TLE epoch observation values (Epoch: 2026-05-06T08:31:04.853Z)

Latitude

57.17008°

Longitude

-107.16062°

Altitude

1,054.484 km

Speed

7.36 km/s

True Right ascension

16h 19m 18s

True Declination

57° 01' 10"

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

18:15:43

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,200.448 km

Perigee altitude

1,007.645 km

Semi-major axis

7,482.183 km

Eccentricity

0.01288

Inclination

99.6166°

RAAN

259.9708°

Arg. of periapsis

7.5961°

True anomaly

50.76033°

Mean anomaly

49.6238°

Eccentric anomaly

50.19088°

Mean motion

3.35352 °/min

Orbital period

107.35 mins

BSTAR

0.0022075

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Other satellites on launch #52 in the year 1975 (1975-06-12 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	2026-05-07 20:40:05.818Z	40.855° NE	2026-05-07 20:45:05.818Z	92.045° ESE	25.819°	2026-05-07 20:51:05.818Z	151.845° SSE
12 mins	2026-05-07 22:26:05.818Z	0.773° NNE	2026-05-07 22:31:05.818Z	298.809° NW	38.286°	2026-05-07 22:38:05.818Z	217.897° SW
4 mins	2026-05-08 07:01:05.818Z	69.524° E	2026-05-08 07:02:05.818Z	59.267° ENE	13.883°	2026-05-08 07:05:05.818Z	29.661° NE
10 mins	2026-05-08 08:43:05.818Z	160.88° S	2026-05-08 08:47:05.818Z	131.986° SE	44.693°	2026-05-08 08:53:05.818Z	346.557° N

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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, 21499 on other resources

View DELTA 1 DEB, 21499 on Heavens-Above

View DELTA 1 DEB, 21499 on Keep Track

View DELTA 1 DEB, 21499 on Celestrak

View DELTA 1 DEB, 21499 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, 21499

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: 2026-05-06T08:31:04.853Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #52 in the year 1975 (1975-06-12 UTC)

DELTA 1 DEB Visibility forecast

Co-orbital & Co-planar RSOs

Check out DELTA 1 DEB, 21499 on other resources

Documentation

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