DELTA 1 DEB, 21599

Orbit data source: Space-Track

DELTA 1 DEB, 21599 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/21599?theme=dark&initialShowStats=false

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Identifier

21599, 1975-052HT

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 21599U 75052HT  26241.65860531  .00000759  00000-0  25888-2 0  9998
2 21599  99.8254 130.2764 0439996 358.7221  26.9974 12.73202625628661

Epoch: 2026-08-29T15:48Z

TLE epoch observation values (Epoch: 2026-08-29T15:48:23.498Z)

Latitude

27.71912°

Longitude

-89.88082°

Altitude

1,071.636 km

Speed

7.459 km/s

True Right ascension

08h 20m 19s

True Declination

27° 35' 01"

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

09:52:50

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,707.078 km

Perigee altitude

1,025.572 km

Semi-major axis

7,744.462 km

Eccentricity

0.044

Inclination

99.8254°

RAAN

130.2764°

Arg. of periapsis

358.7221°

True anomaly

29.40318°

Mean anomaly

26.9974°

Eccentric anomaly

28.18824°

Mean motion

3.18461 °/min

Orbital period

113.04 mins

BSTAR

0.0025888

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

DELTA 1 DEB, 21563 (Decayed)

DELTA 1 DEB, 21679 (Decayed)

DELTA 1 DEB, 21515

DELTA 1 DEB, 21275

DELTA 1 DEB, 21278

DELTA 1 DEB, 21503 (Decayed)

DELTA 1 DEB, 21494 (Decayed)

DELTA 1 DEB, 26836

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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	2026-08-31 04:08:30.601Z	46.138° ENE	2026-08-31 04:14:30.601Z	97.499° ESE	25.963°	2026-08-31 04:21:30.601Z	147.99° SSE
16 mins	2026-08-31 05:58:30.601Z	8.303° NNE	2026-08-31 06:05:30.601Z	300.356° NW	43.069°	2026-08-31 06:14:30.601Z	209.977° SW
8 mins	2026-08-31 07:52:30.601Z	331.295° NNW	2026-08-31 07:55:30.601Z	308.825° NW	16.262°	2026-08-31 08:00:30.601Z	274.782° WNW
8 mins	2026-08-31 14:59:30.601Z	94.121° ESE	2026-08-31 15:03:30.601Z	51.556° ENE	19.899°	2026-08-31 15:07:30.601Z	14.79° NNE
12 mins	2026-08-31 16:48:30.601Z	176.371° S	2026-08-31 16:53:30.601Z	245.55° WSW	42.832°	2026-08-31 17:00:30.601Z	340.181° 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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Check out DELTA 1 DEB, 21599 on other resources

View DELTA 1 DEB, 21599 on Heavens-Above

View DELTA 1 DEB, 21599 on Keep Track

View DELTA 1 DEB, 21599 on Celestrak

View DELTA 1 DEB, 21599 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, 21599

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: 2026-08-29T15:48:23.498Z)

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, 21599 on other resources

Documentation

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