▸Orbital parameters

Orbit class	LEO
Inclination	62.8183°
Eccentricity	0.4626045
Period	233.9 min
Apogee	12,015 km
Perigee	380 km
Mean motion	6.15611093 rev/day
RAAN	107.0880°
Arg of perigee	284.3394°
Mean anomaly	30.0477°
B*	1.0871e-3
Rev at epoch	32,593

▸Two-line element set (TLE)

EPOCH Jul 5, 2026SOURCE CelesTrakDERIVED currentUPDATED Jul 7, 2026

1 37818U 11052A 26186.75143558 .00002826 00000-0 10871-2 0 9994

2 37818 62.8183 107.0880 4626045 284.3394 30.0477 6.15611093325936

▸ source OMM (JSON)

{
  "OBJECT_NAME": "TACSAT 4",
  "OBJECT_ID": "2011-052A",
  "EPOCH": "2026-07-05T18:02:04.034+00:00",
  "MEAN_MOTION": 6.15611093,
  "ECCENTRICITY": 0.46260445,
  "INCLINATION": 62.8183,
  "RA_OF_ASC_NODE": 107.088,
  "ARG_OF_PERICENTER": 284.3394,
  "MEAN_ANOMALY": 30.0477,
  "EPHEMERIS_TYPE": 0,
  "CLASSIFICATION_TYPE": "U",
  "NORAD_CAT_ID": 37818,
  "REV_AT_EPOCH": 32593,
  "BSTAR": 0.0010870596,
  "MEAN_MOTION_DOT": 0.00002826,
  "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	TACSAT 4
Operator	Naval Research LabHIGHvia GCAT — Jonathan McDowell's General Catalog⚠ sources disagree United States Naval Research LaboratoryMEDIUMvia Wikidata
Country	United StatesMEDIUMvia Wikidata
Launch date	Sep 27, 2011HIGHvia GCAT — Jonathan McDowell's General Catalog
Launch mass (kg)	460HIGH

▸Data quality

Score90 / 100

Claims10

Sources2

TLEavailable

▸Sources

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

▸Actions

GET /api/v1/satellites/37818

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