DELTA 1 DEB, 15540

Orbit data source: Space-Track

DELTA 1 DEB, 15540 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.

Loading next visibility...

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/15540?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/15540?theme=dark&initialShowStats=false

Optional Secondary NORAD IDs

Max 10 NORAD IDs; Separated by commas

Initial load time (optional)

ISO8601 Format

TLE date request (optional)

ISO8601 Format

Identifier

15540, 1976-077EU

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, 0.1 m

Radar Cross Section

Small (<0.1 m²)

Expand to show TLE details & history
Last TLE update: 2 days ago

TLE from 2 days ago

0 DELTA 1 DEB
1 15540U 76077EU  26117.63534178  .00001714  00000-0  21035-1 0  9991
2 15540 102.7177  71.3646 0570037 111.9471  66.7229 11.68071343493142

Epoch: 2026-04-27T15:14Z

TLE epoch observation values (Epoch: 2026-04-27T15:14:53.529Z)

Latitude

-4.84029°

Longitude

165.92961°

Altitude

1,668.625 km

Speed

7.108 km/s

True Right ascension

16h 41m 05s

True Declination

-4° 48' 53"

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

14:43:48

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

2,292.355 km

Perigee altitude

1,357.164 km

Semi-major axis

8,202.896 km

Eccentricity

0.057

Inclination

102.7177°

RAAN

71.3646°

Arg. of periapsis

111.9471°

True anomaly

72.88506°

Mean anomaly

66.7229°

Eccentric anomaly

69.78785°

Mean motion

2.92141 °/min

Orbital period

123.23 mins

BSTAR

0.021035

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

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

Did you know?

You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

Click here to try in Sandbox

DELTA 1 DEB Visibility forecast

Loading observer location...
Set Observer location

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.
8 mins	2026-04-29 08:04:12.970Z	61.094° ENE	2026-04-29 08:08:12.970Z	93.083° ESE	15.18°	2026-04-29 08:12:12.970Z	124.098° SE
14 mins	2026-04-29 10:04:12.970Z	17.463° NNE	2026-04-29 10:10:12.970Z	238.595° WSW	44.849°	2026-04-29 10:18:12.970Z	202.883° SW
8 mins	2026-04-29 12:06:12.970Z	340.826° N	2026-04-29 12:10:12.970Z	306.228° NW	16.598°	2026-04-29 12:14:12.970Z	274.717° WNW
16 mins	2026-04-29 19:49:12.970Z	136.191° SSE	2026-04-29 19:57:12.970Z	65.658° ENE	39.499°	2026-04-29 20:05:12.970Z	350.258° N
14 mins	2026-04-29 21:51:12.970Z	204.075° SW	2026-04-29 21:58:12.970Z	259.986° W	29.085°	2026-04-29 22:05:12.970Z	319.826° NNW

Items per page:

1–5 of 5 items

of 1 page

Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

Please sign-in to view Co-orbital & Co-planar RSOs.

Click to sort rows by RSO header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Type header in ascending order	Click to sort rows by Inclination Δ header in ascending order	Click to sort rows by RAAN Δ header in ascending order	Click to sort rows by Coplanar Angle header in ascending order	Click to sort rows by SMA Δ header in ascending order	Click to sort rows by Orbital period header in ascending order	Click to sort rows by <5km Md TCA header in descending order

CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

Authenticating...

Click to sort rows by Secondary header in ascending order	Click to sort rows by Secondary name header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Owner header in ascending order	Click to sort rows by Obj. Type header in ascending order	Click to sort rows by Miss dist. header in ascending order	Click to sort rows by Rel. speed header in ascending order	Click to sort rows by Apr. angle header in ascending order	Click to sort rows by TCA header in descending order

Check out DELTA 1 DEB, 15540 on other resources

View DELTA 1 DEB, 15540 on Heavens-Above

View DELTA 1 DEB, 15540 on Keep Track

View DELTA 1 DEB, 15540 on Celestrak

View DELTA 1 DEB, 15540 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, 15540

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2026-04-27T15:14:53.529Z)

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, 15540 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 2 days ago