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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

SPHERE, 0.3 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

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

TLE from 17 hours ago

0 LAGEOS 1
1 08820U 76039A   26303.59958019  .00000001  00000-0  00000-0 0  9994
2 08820 109.8291 225.6899 0044543 273.2947 255.1384  6.38664908921780

Epoch: 2026-10-30T14:23Z

TLE epoch observation values (Epoch: 2026-10-30T14:23:23.728Z)

Latitude

11.30939°

Longitude

155.04702°

Altitude

5,907.959 km

Speed

5.694 km/s

True Right ascension

03h 19m 15s

True Declination

11° 16' 16"

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

02:56:48

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

5,946.534 km

Perigee altitude

5,837.225 km

Semi-major axis

12,270.017 km

Eccentricity

0.00445

Inclination

109.8291°

RAAN

225.6899°

Arg. of periapsis

273.2947°

True anomaly

254.64576°

Mean anomaly

255.1384°

Eccentric anomaly

254.89201°

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 R/B, 8821 (Decayed)

DELTA 1 DEB (YO), 14514 (Decayed)

LAGEOS 1 AKM, 8822

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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.
57 mins	2026-10-31 08:21:49.895Z	26.174° NE	2026-10-31 08:50:49.895Z	289.475° WNW	84.559°	2026-10-31 09:18:49.895Z	219.949° SW
45 mins	2026-10-31 11:53:49.895Z	38.289° NE	2026-10-31 12:15:49.895Z	344.372° N	37.648°	2026-10-31 12:38:49.895Z	287.865° WNW
49 mins	2026-10-31 15:12:49.895Z	91.644° ESE	2026-10-31 15:36:49.895Z	28.963° NE	46.028°	2026-10-31 16:01:49.895Z	327.832° NNW
57 mins	2026-10-31 18:37:49.895Z	161.228° S	2026-10-31 19:05:49.895Z	248.783° W	71.31°	2026-10-31 19:34:49.895Z	332.997° NNW
19 mins	2026-11-01 06:59:49.895Z	28.334° NE	2026-11-01 07:18:49.895Z	58.069° ENE	52.558°	2026-11-01 07:18:49.895Z	58.069° ENE

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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: 17 hours ago

TLE from 17 hours ago

TLE epoch observation values (Epoch: 2026-10-30T14:23:23.728Z)

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: 17 hours ago