**DELTA 1 DEB *, 18591**

Orbit data source: Space-Track

DELTA 1 DEB *, 18591 is space debris in LEO originally from a launch on Thu, 29 Jul 1976 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/18591?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

18591, 1976-077FD

Orbit

LEO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

Unknown

Mission

Spacecraft

Bus & Motor

Unknown

Mass

Unknown

Launch date (UTC)

1976-07-29 (50 years ago)

Launch vehicle

Unknown

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown shape, 1.1 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 4 days ago

TLE from 4 days ago

0 DELTA 1 DEB *
1 18591U 76077FD  26115.62483272  .00003671  00000-0  81341-1 0  9995
2 18591 101.0113 160.8028 1095202 238.0343 289.0126 10.59190265586229

Epoch: 2026-04-25T14:59Z

TLE epoch observation values (Epoch: 2026-04-25T14:59:45.547Z)

Latitude

24.80166°

Longitude

-92.6422°

Altitude

2,168.582 km

Speed

6.915 km/s

True Right ascension

23h 03m 45s

True Declination

24° 41' 33"

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

15:31:00

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

3,336.836 km

Perigee altitude

1,418.916 km

Semi-major axis

8,756.013 km

Eccentricity

0.10952

Inclination

101.0113°

RAAN

160.8028°

Arg. of periapsis

238.0343°

True anomaly

276.69053°

Mean anomaly

289.0126°

Eccentric anomaly

282.89583°

Mean motion

2.64901 °/min

Orbital period

135.9 mins

BSTAR

0.081341

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Other satellites on launch #77 in the year 1976 (1976-07-29 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.
18 mins	2026-04-29 13:56:17.207Z	33.436° NE	2026-04-29 14:06:17.207Z	82.863° E	24.858°	2026-04-29 14:14:17.207Z	135.3° SSE
23 mins	2026-04-29 16:08:17.207Z	13.561° NNE	2026-04-29 16:21:17.207Z	299.111° NW	44.139°	2026-04-29 16:31:17.207Z	209.843° SW
17 mins	2026-04-29 18:22:17.207Z	0.69° NNE	2026-04-29 18:31:17.207Z	320.161° NNW	22.23°	2026-04-29 18:39:17.207Z	277.103° WNW
11 mins	2026-04-29 22:36:17.207Z	42.306° NE	2026-04-29 22:41:17.207Z	24.266° NE	13.78°	2026-04-29 22:47:17.207Z	2.026° NNE
27 mins	2026-04-30 00:35:17.207Z	106.504° ESE	2026-04-30 00:48:17.207Z	50.03° ENE	32.052°	2026-04-30 01:02:17.207Z	352.774° N
33 mins	2026-04-30 02:43:17.207Z	164.621° S	2026-04-30 02:58:17.207Z	232.026° WSW	44.741°	2026-04-30 03:16:17.207Z	343.199° N
24 mins	2026-04-30 05:02:17.207Z	228.961° WSW	2026-04-30 05:13:17.207Z	273.896° WNW	23.001°	2026-04-30 05:26:17.207Z	323.937° NNW

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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 *, 18591 on other resources

View DELTA 1 DEB *, 18591 on Heavens-Above

View DELTA 1 DEB *, 18591 on Keep Track

View DELTA 1 DEB *, 18591 on Celestrak

View DELTA 1 DEB *, 18591 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 *, 18591

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 4 days ago

TLE from 4 days ago

TLE epoch observation values (Epoch: 2026-04-25T14:59:45.547Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #77 in the year 1976 (1976-07-29 UTC)

DELTA 1 DEB * Visibility forecast

Co-orbital & Co-planar RSOs

Check out DELTA 1 DEB *, 18591 on other resources

Documentation

**DELTA 1 DEB *, 18591**

Expand to show TLE details & history
Last TLE update: 4 days ago