DELTA 1 DEB, 13539

Orbit data source: Space-Track

DELTA 1 DEB, 13539 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/13539?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/13539?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

13539, 1976-077EM

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: 3 days ago

TLE from 3 days ago

0 DELTA 1 DEB
1 13539U 76077EM  26300.62425020 -.00000032  00000-0  50838-4 0  9994
2 13539 101.8677 352.4037 0412609 207.4247 310.9638 11.65448434969188

Epoch: 2026-10-27T14:58Z

TLE epoch observation values (Epoch: 2026-10-27T14:58:55.217Z)

Latitude

24.75376°

Longitude

-82.77774°

Altitude

1,627.959 km

Speed

7.151 km/s

True Right ascension

11h 51m 44s

True Declination

24° 38' 15"

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

20:57:03

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

2,175.989 km

Perigee altitude

1,498.06 km

Semi-major axis

8,215.161 km

Eccentricity

0.04126

Inclination

101.8677°

RAAN

352.4037°

Arg. of periapsis

207.4247°

True anomaly

307.27126°

Mean anomaly

310.9638°

Eccentric anomaly

309.12995°

Mean motion

2.91487 °/min

Orbital period

123.5 mins

BSTAR

0.000050838

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

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

DELTA 1 DEB, 40770

DELTA 1 DEB, 10718

DELTA 1 DEB, 16997 (Decayed)

DELTA 1 DEB, 18677 (Decayed)

DELTA 1 DEB, 18600

DELTA 1 DEB, 18540

DELTA 1 DEB, 16999 (Decayed)

DELTA 1 DEB, 48088

DELTA 1 DEB, 18232

DELTA 1 DEB, 12541 (Decayed)

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.
21 mins	2026-10-31 02:37:04.144Z	142.151° SSE	2026-10-31 02:48:04.144Z	61.236° ENE	65.067°	2026-10-31 02:58:04.144Z	348.792° N
19 mins	2026-10-31 04:40:04.144Z	203.716° SW	2026-10-31 04:49:04.144Z	262.506° W	37.517°	2026-10-31 04:59:04.144Z	326.69° NNW
16 mins	2026-10-31 15:36:04.144Z	31.853° NE	2026-10-31 15:44:04.144Z	99.017° ESE	43.552°	2026-10-31 15:52:04.144Z	167.649° S
16 mins	2026-10-31 17:37:04.144Z	5.073° NNE	2026-10-31 17:45:04.144Z	301.072° NW	45.256°	2026-10-31 17:53:04.144Z	232.57° WSW

Items per page:

1–4 of 4 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, 13539 on other resources

View DELTA 1 DEB, 13539 on Heavens-Above

View DELTA 1 DEB, 13539 on Keep Track

View DELTA 1 DEB, 13539 on Celestrak

View DELTA 1 DEB, 13539 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, 13539

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 3 days ago

TLE from 3 days ago

TLE epoch observation values (Epoch: 2026-10-27T14:58:55.217Z)

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, 13539 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 3 days ago