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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ISO8601 Format

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 (50 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)

Expand to show TLE details & history
Last TLE update: 12 hours ago

TLE from 12 hours ago

0 DELTA 1 DEB
1 21277U 75052N   25309.14609822  .00000098  00000-0  33083-3 0  9996
2 21277  99.7173  94.2293 0132935  33.1162 141.9654 13.19189822660449

Epoch: 2025-11-05T03:30Z

TLE epoch observation values (Epoch: 2025-11-05T03:30:22.886Z)

Latitude

3.84757°

Longitude

177.66756°

Altitude

1,269.876 km

Speed

7.183 km/s

True Right ascension

18h 19m 32s

True Declination

3° 49' 34"

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

11:41:22

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,285.702 km

Perigee altitude

1,084.616 km

Semi-major axis

7,563.296 km

Eccentricity

0.01329

Inclination

99.7173°

RAAN

94.2293°

Arg. of periapsis

33.1162°

True anomaly

142.8918°

Mean anomaly

141.9654°

Eccentric anomaly

142.42981°

Mean motion

3.29972 °/min

Orbital period

109.1 mins

BSTAR

0.00033083

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

DELTA 1 DEB, 21491 (Decayed)

DELTA 1 DEB, 7965 (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.
10 mins	2025-11-05 21:27:21.008Z	46.356° ENE	2025-11-05 21:32:21.008Z	97.613° ESE	23.439°	2025-11-05 21:37:21.008Z	144.447° SSE
12 mins	2025-11-05 23:14:21.008Z	4.26° NNE	2025-11-05 23:20:21.008Z	275.406° WNW	40.498°	2025-11-05 23:26:21.008Z	214.62° SW
5 mins	2025-11-06 07:57:21.008Z	77.086° E	2025-11-06 07:59:21.008Z	56.848° ENE	15.358°	2025-11-06 08:02:21.008Z	27.54° NE
11 mins	2025-11-06 09:41:21.008Z	163.803° S	2025-11-06 09:46:21.008Z	339.391° N	44.852°	2025-11-06 09:52:21.008Z	345.183° N

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: 12 hours ago

TLE from 12 hours ago

TLE epoch observation values (Epoch: 2025-11-05T03:30:22.886Z)

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: 12 hours ago