▸Orbital parameters

Orbit class	MEO
Inclination	109.8035°
Eccentricity	0.0044670
Period	225.5 min
Apogee	5,948 km
Perigee	5,838 km
Mean motion	6.38664686 rev/day
RAAN	186.0177°
Arg of perigee	298.0752°
Mean anomaly	218.2502°
B*	0.0000e+0
Rev at epoch	91,438

▸Two-line element set (TLE)

EPOCH Jul 6, 2026SOURCE CelesTrakDERIVED currentUPDATED Jul 7, 2026

1 08820U 76039A 26187.71676375 .00000020 00000-0 00000-0 0 9991

2 08820 109.8035 186.0177 0044670 298.0752 218.2502 6.38664686914388

▸ source OMM (JSON)

{
  "OBJECT_NAME": "LAGEOS 1",
  "OBJECT_ID": "1976-039A",
  "EPOCH": "2026-07-06T17:12:08.388+00:00",
  "MEAN_MOTION": 6.38664686,
  "ECCENTRICITY": 0.004467,
  "INCLINATION": 109.8035,
  "RA_OF_ASC_NODE": 186.0177,
  "ARG_OF_PERICENTER": 298.0752,
  "MEAN_ANOMALY": 218.2502,
  "EPHEMERIS_TYPE": 0,
  "CLASSIFICATION_TYPE": "U",
  "NORAD_CAT_ID": 8820,
  "REV_AT_EPOCH": 91438,
  "BSTAR": 0,
  "MEAN_MOTION_DOT": 2e-7,
  "MEAN_MOTION_DDOT": 0
}

Reconstructed from CelesTrak OMM mean-elements (element-set number is a placeholder). TLE/OMM data is approximate. Not for operational use or collision avoidance.

▸Satellite metadata

Name	LAGEOS 1
Operator	NASA Marshall Space Flight CenterHIGHvia GCAT — Jonathan McDowell's General Catalog
Country	United States
Launch date	May 4, 1976HIGHvia GCAT — Jonathan McDowell's General Catalog
Launch mass (kg)	411HIGHvia GCAT — Jonathan McDowell's General Catalog⚠ sources disagree 406.965MEDIUMvia Wikidata

▸Data quality

Score90 / 100

Claims8

Sources2

TLEavailable

▸Sources

GCAT — Jonathan McDowell's General CatalogCC BY 4.0planet4589.org
WikidataCC0 1.0query.wikidata.org

▸Actions

GET /api/v1/satellites/8820

//Orbital data is approximate and not for operational use. Last ingested from CelesTrak on Jul 7, 2026.