DELTA 1 DEB, 18540

Orbit data source: Space-Track

DELTA 1 DEB, 18540 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/18540?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

18540, 1976-077FC

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 (49 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)

Expand to show TLE details & history
Last TLE update: 17 hours ago

TLE from 17 hours ago

0 DELTA 1 DEB
1 18540U 76077FC  25291.24772462  .00001181  00000-0  76181-2 0  9994
2 18540 103.9273  28.3408 0395819  64.3846 324.3576 12.34407667585419

Epoch: 2025-10-18T05:56Z

TLE epoch observation values (Epoch: 2025-10-18T05:56:43.407Z)

Latitude

25.2041°

Longitude

-94.48997°

Altitude

1,283.028 km

Speed

7.33 km/s

True Right ascension

01h 26m 41s

True Declination

25° 04' 51"

Sunlit

Object was in full shadow 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

18:13:40

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,841.042 km

Perigee altitude

1,215.155 km

Semi-major axis

7,906.236 km

Eccentricity

0.03958

Inclination

103.9273°

RAAN

28.3408°

Arg. of periapsis

64.3846°

True anomaly

321.60504°

Mean anomaly

324.3576°

Eccentric anomaly

322.99252°

Mean motion

3.08737 °/min

Orbital period

116.6 mins

BSTAR

0.0076181

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

DELTA 1 DEB, 10705 (Decayed)

DELTA 1 DEB, 40770

DELTA 1 DEB, 10753 (Decayed)

DELTA 1 DEB, 40772

DELTA 1 DEB, 10651 (Decayed)

DELTA 1 DEB, 40753

NOAA 5, 9057

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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	2025-10-19 05:17:21.584Z	123.089° SE	2025-10-19 05:23:21.584Z	54.883° ENE	33.065°	2025-10-19 05:29:21.584Z	354.274° N
11 mins	2025-10-19 07:12:21.584Z	198.833° SSW	2025-10-19 07:17:21.584Z	256.307° W	31.259°	2025-10-19 07:23:21.584Z	321.036° NNW
15 mins	2025-10-19 19:22:21.584Z	28.851° NE	2025-10-19 19:28:21.584Z	93.556° ESE	42.124°	2025-10-19 19:37:21.584Z	189.44° SSW
12 mins	2025-10-19 21:17:21.584Z	353.996° N	2025-10-19 21:22:21.584Z	306.006° NW	26.033°	2025-10-19 21:29:21.584Z	249.357° W

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, 18540 on other resources

View DELTA 1 DEB, 18540 on Heavens-Above

View DELTA 1 DEB, 18540 on Keep Track

View DELTA 1 DEB, 18540 on Celestrak

View DELTA 1 DEB, 18540 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, 18540

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 17 hours ago

TLE from 17 hours ago

TLE epoch observation values (Epoch: 2025-10-18T05:56:43.407Z)

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, 18540 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 17 hours ago