▸Orbital parameters

Orbit class	LEO
Inclination	81.0003°
Eccentricity	0.0004803
Period	104.0 min
Apogee	950 km
Perigee	943 km
Mean motion	13.84817944 rev/day
RAAN	52.8209°
Arg of perigee	286.1641°
Mean anomaly	73.8986°
B*	1.7401e-5
Rev at epoch	16,488

▸Two-line element set (TLE)

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

1 56164U 23050C 26188.01853522 .00000031 00000-0 17401-4 0 9994

2 56164 81.0003 52.8209 0004803 286.1641 73.8986 13.84817944164882

▸ source OMM (JSON)

{
  "OBJECT_NAME": "CHECKMATE 4",
  "OBJECT_ID": "2023-050C",
  "EPOCH": "2026-07-07T00:26:41.443+00:00",
  "MEAN_MOTION": 13.84817944,
  "ECCENTRICITY": 0.0004803,
  "INCLINATION": 81.0003,
  "RA_OF_ASC_NODE": 52.8209,
  "ARG_OF_PERICENTER": 286.1641,
  "MEAN_ANOMALY": 73.8986,
  "EPHEMERIS_TYPE": 0,
  "CLASSIFICATION_TYPE": "U",
  "NORAD_CAT_ID": 56164,
  "REV_AT_EPOCH": 16488,
  "BSTAR": 0.000017401,
  "MEAN_MOTION_DOT": 3.1e-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	CHECKMATE 4
Operator	Space Development AgencyHIGHvia GCAT — Jonathan McDowell's General Catalog
Country	United States
Launch date	Apr 2, 2023HIGHvia GCAT — Jonathan McDowell's General Catalog
Launch mass (kg)	300HIGHvia GCAT — Jonathan McDowell's General Catalog
Mission purpose	—
Object class	PAYLOADHIGH

▸Data quality

Score85 / 100

Claims7

Sources1

TLEavailable

▸Sources

GCAT — Jonathan McDowell's General CatalogCC BY 4.0planet4589.org

▸Actions

GET /api/v1/satellites/56164

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