USA 99 (MILSTAR-1 1) is a payload in GEO orbit, operated by US Air Force Space and Missile Center, launched 1994.
| Orbit class | GEO |
| Inclination | 17.6539° |
| Eccentricity | 0.0001496 |
| Period | 1458.7 min |
| Apogee | 36,234 km |
| Perigee | 36,221 km |
| Mean motion | 0.98720313 rev/day |
| RAAN | 27.5021° |
| Arg of perigee | 186.4187° |
| Mean anomaly | 167.1075° |
| B* | 0.0000e+0 |
| Rev at epoch | 3,313 |
1 22988U 94009A 26187.55436426 .00000007 00000-0 00000-0 0 99972 22988 17.6539 27.5021 0001496 186.4187 167.1075 0.98720313 33134{
"OBJECT_NAME": "USA 99 (MILSTAR-1 1)",
"OBJECT_ID": "1994-009A",
"EPOCH": "2026-07-06T13:18:17.072+00:00",
"MEAN_MOTION": 0.98720313,
"ECCENTRICITY": 0.0001496,
"INCLINATION": 17.6539,
"RA_OF_ASC_NODE": 27.5021,
"ARG_OF_PERICENTER": 186.4187,
"MEAN_ANOMALY": 167.1075,
"EPHEMERIS_TYPE": 0,
"CLASSIFICATION_TYPE": "U",
"NORAD_CAT_ID": 22988,
"REV_AT_EPOCH": 3313,
"BSTAR": 0,
"MEAN_MOTION_DOT": 7e-8,
"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 | USA 99 (MILSTAR-1 1) |
| Operator | |
| Country | United States |
| Launch date | |
| Launch mass (kg) | |
| Mission purpose | — |
| Object class | PAYLOADHIGH |
//Orbital data is approximate and not for operational use. Last ingested from CelesTrak on Jul 7, 2026.
| Orbital regime |
| Status |