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Spacecraft information: SBIRS GEO-4
Launch Details
| Launched | 20 January 2017 |
| Flight ended | – |
| Status | Operational |
| Categories |
Geostationary
Active satellites |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 41937 |
| COSPAR ID | 2017-004A |
| Alternative names |
USA 273 |
| Observing |
Current orbital elements
| Inclination | 1.911° |
| Eccentricity | 0.00021 |
| RA ascending node | 2.467 hr |
| Argument perigee | 229.571° |
| Mean anomaly | 169.321° |
| Orbital period | 1436.089 min |
| Epoch of osculation | 14 Dec 2025, 22:04 |
Derived Quantities
| Min Altitude | 35784.7 km |
| Mean Altitude | 35793.6 km |
| Peak Altitude | 35802.5 km |
Launched alongside
ATLAS 5 CENTAUR R/BOrbital History
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