DELTA 1 DEB, 21278

Orbit data source: Space-Track

DELTA 1 DEB, 21278 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/21278?theme=dark&initialShowStats=false

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Identifier

21278, 1975-052P

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, 0.3 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 8 hours ago

TLE from 8 hours ago

0 DELTA 1 DEB
1 21278U 75052P   26304.86897372  .00000128  00000-0  55670-3 0  9991
2 21278  99.8441  81.0581 0387406 294.4710 221.7595 12.77585214654003

Epoch: 2026-10-31T20:51Z

TLE epoch observation values (Epoch: 2026-10-31T20:51:19.329Z)

Latitude

26.23069°

Longitude

-87.05988°

Altitude

1,582.515 km

Speed

6.974 km/s

True Right ascension

17h 43m 45s

True Declination

26° 06' 31"

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

00:54:54

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,647.933 km

Perigee altitude

1,049.256 km

Semi-major axis

7,726.732 km

Eccentricity

0.03874

Inclination

99.8441°

RAAN

81.0581°

Arg. of periapsis

294.471°

True anomaly

218.90726°

Mean anomaly

221.7595°

Eccentric anomaly

220.32315°

Mean motion

3.19558 °/min

Orbital period

112.66 mins

BSTAR

0.0005567

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

DELTA 1 DEB, 21382 (Decayed)

DELTA 1 DEB, 21672 (Decayed)

DELTA 1 DEB, 21379 (Decayed)

DELTA 1 DEB, 21337 (Decayed)

DELTA 1 DEB, 21671 (Decayed)

DELTA 1 DEB, 21507 (Decayed)

DELTA 1 DEB, 21455 (Decayed)

DELTA 1 DEB, 21349 (Decayed)

DELTA 1 DEB, 21436 (Decayed)

DELTA 1 DEB, 21543 (Decayed)

DELTA 1 DEB, 21509 (Decayed)

DELTA 1 DEB, 42630

DELTA 1 DEB, 21522 (Decayed)

DELTA 1 DEB, 21600 (Decayed)

DELTA 1 DEB, 21348 (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.
12 mins	2026-11-01 07:27:20.349Z	103.107° ESE	2026-11-01 07:33:20.349Z	52.001° ENE	25.237°	2026-11-01 07:39:20.349Z	7.161° NNE
15 mins	2026-11-01 09:16:20.349Z	170.837° S	2026-11-01 09:23:20.349Z	286.052° WNW	75.614°	2026-11-01 09:31:20.349Z	342.527° N
5 mins	2026-11-01 11:13:20.349Z	260.316° W	2026-11-01 11:15:20.349Z	275.979° WNW	13.61°	2026-11-01 11:18:20.349Z	298.202° NW
15 mins	2026-11-01 21:06:20.349Z	33.456° NE	2026-11-01 21:13:20.349Z	94.363° ESE	40.756°	2026-11-01 21:21:20.349Z	162.317° S
15 mins	2026-11-01 22:57:20.349Z	1.542° NNE	2026-11-01 23:04:20.349Z	294.974° NW	51.533°	2026-11-01 23:12:20.349Z	223.766° SW
5 mins	2026-11-02 00:51:20.349Z	326.318° NNW	2026-11-02 00:53:20.349Z	313.043° NW	12.54°	2026-11-02 00:56:20.349Z	293.725° 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, 21278 on other resources

View DELTA 1 DEB, 21278 on Heavens-Above

View DELTA 1 DEB, 21278 on Keep Track

View DELTA 1 DEB, 21278 on Celestrak

View DELTA 1 DEB, 21278 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, 21278

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2026-10-31T20:51:19.329Z)

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, 21278 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 8 hours ago