GSAT0217 (GALILEO 21) is a payload in MEO orbit, operated by European Global Navigation Satellite Systems Agency, launched 2017.
| Orbit class | MEO |
| Inclination | 55.0683° |
| Eccentricity | 0.0003668 |
| Period | 844.7 min |
| Apogee | 23,233 km |
| Perigee | 23,211 km |
| Mean motion | 1.70474346 rev/day |
| RAAN | 220.9785° |
| Arg of perigee | 292.4751° |
| Mean anomaly | 67.5566° |
| B* | 0.0000e+0 |
| Rev at epoch | 5,331 |
1 43057U 17079C 26187.29808231 .00000077 00000-0 00000-0 0 99942 43057 55.0683 220.9785 0003668 292.4751 67.5566 1.70474346 53317{
"OBJECT_NAME": "GSAT0217 (GALILEO 21)",
"OBJECT_ID": "2017-079C",
"EPOCH": "2026-07-06T07:09:14.312+00:00",
"MEAN_MOTION": 1.70474346,
"ECCENTRICITY": 0.00036679,
"INCLINATION": 55.0683,
"RA_OF_ASC_NODE": 220.9785,
"ARG_OF_PERICENTER": 292.4751,
"MEAN_ANOMALY": 67.5566,
"EPHEMERIS_TYPE": 0,
"CLASSIFICATION_TYPE": "U",
"NORAD_CAT_ID": 43057,
"REV_AT_EPOCH": 5331,
"BSTAR": 0,
"MEAN_MOTION_DOT": 7.7e-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.
| Name | GSAT0217 (GALILEO 21) |
| Operator | European Global Navigation Satellite Systems AgencyHIGHvia GCAT — Jonathan McDowell's General Catalog⚠ sources disagree |
| Country | European Union |
| Launch date | |
| Launch mass (kg) |
//Orbital data is approximate and not for operational use. Last ingested from CelesTrak on Jul 7, 2026.
| Mission purpose | — |
| Object class |
| Orbital regime |
| Status |