DELTA 1 DEB, 21277

Orbit data source: Space-Track

DELTA 1 DEB, 21277 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/21277?theme=dark&initialShowStats=false

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Identifier

21277, 1975-052N

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, 0.4 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 21277U 75052N   26135.30601346  .00000108  00000-0  35783-3 0  9996
2 21277  99.7418 271.1415 0131732 303.6341  84.5323 13.19263540685656

Epoch: 2026-05-15T07:20Z

TLE epoch observation values (Epoch: 2026-05-15T07:20:39.562Z)

Latitude

29.24831°

Longitude

-77.55149°

Altitude

1,182.831 km

Speed

7.269 km/s

True Right ascension

17h 42m 36s

True Declination

29° 06' 37"

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

16:02:04

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,284.507 km

Perigee altitude

1,085.249 km

Semi-major axis

7,563.015 km

Eccentricity

0.01317

Inclination

99.7418°

RAAN

271.1415°

Arg. of periapsis

303.6341°

True anomaly

86.03716°

Mean anomaly

84.5323°

Eccentric anomaly

85.28451°

Mean motion

3.2999 °/min

Orbital period

109.09 mins

BSTAR

0.00035783

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

DELTA 1 DEB, 21378 (Decayed)

DELTA 1 DEB, 21456 (Decayed)

DELTA 1 DEB, 21506

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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	2026-05-16 08:46:25.581Z	158.996° S	2026-05-16 08:53:25.581Z	22.937° NE	44.354°	2026-05-16 08:59:25.581Z	347.343° N
7 mins	2026-05-16 10:38:25.581Z	243.376° WSW	2026-05-16 10:41:25.581Z	271.863° WNW	16.305°	2026-05-16 10:45:25.581Z	306.936° NW
7 mins	2026-05-16 20:16:25.581Z	62.042° ENE	2026-05-16 20:19:25.581Z	88.484° E	16.272°	2026-05-16 20:23:25.581Z	122.815° SE
13 mins	2026-05-16 22:01:25.581Z	14.068° NNE	2026-05-16 22:07:25.581Z	357.817° N	44.697°	2026-05-16 22:14:25.581Z	198.417° SSW
7 mins	2026-05-16 23:51:25.581Z	331.138° NNW	2026-05-16 23:54:25.581Z	303.495° NW	17.729°	2026-05-16 23:58:25.581Z	269.053° W

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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, 21277 on other resources

View DELTA 1 DEB, 21277 on Heavens-Above

View DELTA 1 DEB, 21277 on Keep Track

View DELTA 1 DEB, 21277 on Celestrak

View DELTA 1 DEB, 21277 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, 21277

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: 2026-05-15T07:20:39.562Z)

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, 21277 on other resources

Documentation

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