▸Orbital parameters

Orbit class	HEO
Inclination	64.3787°
Eccentricity	0.4670357
Period	2873.0 min
Apogee	91,832 km
Perigee	29,301 km
Mean motion	0.50122523 rev/day
RAAN	282.7174°
Arg of perigee	64.5370°
Mean anomaly	0.0317°
B*	0.0000e+0
Rev at epoch	2,311

▸Two-line element set (TLE)

EPOCH Jul 8, 2026SOURCE CelesTrakDERIVED currentUPDATED Jul 7, 2026

1 25989U 99066A 26189.29225867 .00000112 00000-0 00000-0 0 9994

2 25989 64.3787 282.7174 4670357 64.5370 0.0317 0.50122523 23116

▸ source OMM (JSON)

{
  "OBJECT_NAME": "XMM-NEWTON",
  "OBJECT_ID": "1999-066A",
  "EPOCH": "2026-07-08T07:00:51.149+00:00",
  "MEAN_MOTION": 0.50122523,
  "ECCENTRICITY": 0.46703572,
  "INCLINATION": 64.3787,
  "RA_OF_ASC_NODE": 282.7174,
  "ARG_OF_PERICENTER": 64.537,
  "MEAN_ANOMALY": 0.0317,
  "EPHEMERIS_TYPE": 0,
  "CLASSIFICATION_TYPE": "U",
  "NORAD_CAT_ID": 25989,
  "REV_AT_EPOCH": 2311,
  "BSTAR": 0,
  "MEAN_MOTION_DOT": 0.00000112,
  "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	XMM-NEWTON
Operator	European Space AgencyHIGHvia GCAT — Jonathan McDowell's General Catalog European Space AgencyMEDIUMvia Wikidata
Country	ESA
Launch date	Dec 10, 1999HIGHvia GCAT — Jonathan McDowell's General Catalog
Launch mass (kg)	3764HIGHvia GCAT — Jonathan McDowell's General Catalog⚠ sources disagree

▸Data quality

Score90 / 100

Claims9

Sources2

TLEavailable

▸Sources

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

▸Actions

GET /api/v1/satellites/25989

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