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LAGEOS 1, 8820

Orbit data source: Space-Track

LAGEOS 1, 8820 is a payload satellite owned by NASA MSFC (US) that was launched on Tue, 04 May 1976 UTC via a DELTA 2913 launch vehicle from the Air Force Western Test Range (AFWTR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.

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Iframe URL

https://www.satcat.com/sats-embedded/8820?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

8820, 1976-039A

Orbit

Active

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

Bendix

Mission

Operational spacecraft

Bus & Motor

LAGEOS, Unknown motor

Mass

411 kg wet, 411 kg dry

Launch date (UTC)

1976-05-04 (50 years ago)

Launch vehicle

DELTA 2913

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 8 hours ago

TLE from 8 hours ago

0 LAGEOS 1
1  8820U 76039A   26143.55995587  .00000007  00000-0  00000+0 0  9998
2  8820 109.8032 170.9097 0044677 307.5444 213.2615  6.38664695911566

Epoch: 2026-05-23T13:26Z

TLE epoch observation values (Epoch: 2026-05-23T13:26:20.187Z)

Latitude

18.28509°

Longitude

-85.04253°

Altitude

5,939.921 km

Speed

5.679 km/s

True Right ascension

23h 50m 51s

True Declination

18° 13' 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

06:51:43

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

5,946.7 km

Perigee altitude

5,837.062 km

Semi-major axis

12,270.018 km

Eccentricity

0.00447

Inclination

109.8032°

RAAN

170.9097°

Arg. of periapsis

307.5444°

True anomaly

212.98202°

Mean anomaly

213.2615°

Eccentric anomaly

213.12163°

Mean motion

1.59689 °/min

Orbital period

225.44 mins

BSTAR

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Other satellites on launch #39 in the year 1976 (1976-05-04 UTC)

DELTA 1 DEB (YO), 14514 (Decayed)

LAGEOS 1 AKM, 8822

DELTA 1 R/B, 8821 (Decayed)

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

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LAGEOS 1 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.
54 mins	2026-05-23 23:09:07.649Z	114.853° SE	2026-05-23 23:36:07.649Z	40.293° NE	41.019°	2026-05-24 00:03:07.649Z	332.094° NNW
53 mins	2026-05-24 02:43:07.649Z	185.453° SSW	2026-05-24 03:08:07.649Z	254.421° W	36.252°	2026-05-24 03:36:07.649Z	329.555° NNW
37 mins	2026-05-24 11:34:07.649Z	48.246° ENE	2026-05-24 11:52:07.649Z	90.815° ESE	19.462°	2026-05-24 12:11:07.649Z	135.661° SSE
56 mins	2026-05-24 15:02:07.649Z	26.457° NE	2026-05-24 15:30:07.649Z	251.156° W	44.986°	2026-05-24 15:58:07.649Z	216.228° SW
46 mins	2026-05-24 18:33:07.649Z	37.103° NE	2026-05-24 18:56:07.649Z	340.309° N	32.025°	2026-05-24 19:19:07.649Z	284.183° WNW

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

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Check out LAGEOS 1, 8820 on other resources

View LAGEOS 1, 8820 on NASA - NSSDCA Website

View LAGEOS 1, 8820 on Heavens-Above

View LAGEOS 1, 8820 on Keep Track

View LAGEOS 1, 8820 on Celestrak

View LAGEOS 1, 8820 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

LAGEOS 1, 8820

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2026-05-23T13:26:20.187Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #39 in the year 1976 (1976-05-04 UTC)

LAGEOS 1 Visibility forecast

Co-orbital & Co-planar RSOs

Check out LAGEOS 1, 8820 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 8 hours ago