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

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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: 19 hours ago

TLE from 19 hours ago

0 LAGEOS 1
1  8820U 76039A   26053.14826764 -.00000003  00000-0  00000+0 0  9990
2  8820 109.8210 139.9596 0044665 326.9081  59.3905  6.38664870905796

Epoch: 2026-02-22T03:33Z

TLE epoch observation values (Epoch: 2026-02-22T03:33:30.324Z)

Latitude

25.05747°

Longitude

-75.15128°

Altitude

5,867.059 km

Speed

5.714 km/s

True Right ascension

08h 41m 08s

True Declination

24° 58' 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

01:35:07

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

5,946.684 km

Perigee altitude

5,837.076 km

Semi-major axis

12,270.017 km

Eccentricity

0.00447

Inclination

109.821°

RAAN

139.9596°

Arg. of periapsis

326.9081°

True anomaly

59.83226°

Mean anomaly

59.3905°

Eccentric anomaly

59.61125°

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)

LAGEOS 1 AKM, 8822

DELTA 1 DEB (YO), 14514 (Decayed)

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.
46 mins	2026-02-22 22:45:15.337Z	41.167° NE	2026-02-22 23:08:15.337Z	346.112° N	31.003°	2026-02-22 23:31:15.337Z	289.957° WNW
49 mins	2026-02-23 02:05:15.337Z	94.6° ESE	2026-02-23 02:29:15.337Z	31.612° NE	36.34°	2026-02-23 02:54:15.337Z	328.828° NNW
55 mins	2026-02-23 05:32:15.337Z	164.654° S	2026-02-23 05:58:15.337Z	242.293° WSW	42.853°	2026-02-23 06:27:15.337Z	332.302° NNW
56 mins	2026-02-23 17:53:15.337Z	28.401° NE	2026-02-23 18:21:15.337Z	116.269° SE	43.069°	2026-02-23 18:49:15.337Z	197.171° SSW
49 mins	2026-02-23 21:26:15.337Z	30.374° NE	2026-02-23 21:50:15.337Z	328.588° NNW	36.204°	2026-02-23 22:15:15.337Z	265.307° W

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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: 19 hours ago

TLE from 19 hours ago

TLE epoch observation values (Epoch: 2026-02-22T03:33:30.324Z)

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: 19 hours ago