▸Orbital parameters

Orbit class	GEO
Inclination	4.4893°
Eccentricity	0.0000961
Period	1436.1 min
Apogee	35,791 km
Perigee	35,783 km
Mean motion	1.00271803 rev/day
RAAN	271.8128°
Arg of perigee	33.2837°
Mean anomaly	167.8488°
B*	0.0000e+0
Rev at epoch	235

▸Two-line element set (TLE)

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

1 66549U 25277A 26188.19697713 -.00000342 00000-0 00000-0 0 9991

2 66549 4.4893 271.8128 0000961 33.2837 167.8488 1.00271803 2355

▸ source OMM (JSON)

{
  "OBJECT_NAME": "SHIJIAN-28 (SJ-28)",
  "OBJECT_ID": "2025-277A",
  "EPOCH": "2026-07-07T04:43:38.824+00:00",
  "MEAN_MOTION": 1.00271803,
  "ECCENTRICITY": 0.0000961,
  "INCLINATION": 4.4893,
  "RA_OF_ASC_NODE": 271.8128,
  "ARG_OF_PERICENTER": 33.2837,
  "MEAN_ANOMALY": 167.8488,
  "EPHEMERIS_TYPE": 0,
  "CLASSIFICATION_TYPE": "U",
  "NORAD_CAT_ID": 66549,
  "REV_AT_EPOCH": 235,
  "BSTAR": 0,
  "MEAN_MOTION_DOT": -0.00000342,
  "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	SHIJIAN-28 (SJ-28)
Operator	Strategic Support TroopsHIGHvia GCAT — Jonathan McDowell's General Catalog
Country	China
Launch date	Nov 30, 2025HIGHvia GCAT — Jonathan McDowell's General Catalog
Launch mass (kg)	4000HIGHvia 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/66549

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