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USA-273
 Launch of USA-273 on an Atlas V | |
| Names | SBIRS GEO-3 (SV-4) Space-Based Infrared System GEOstationary-3 [1] |
|---|---|
| Mission type | Infrared early warning IRINT |
| Operator | United States Air Force / United States Space Force |
| COSPAR ID | 2017-004A |
| SATCAT no. | 41937 |
| Website | https://www.spaceforce.mil/ |
| Mission duration | 12 years (planned) 7 years, 8 months and 29 days (in progress) |
| Spacecraft properties | |
| Spacecraft | SBIRS GEO-3 |
| Spacecraft type | SBIRS GEO |
| Bus | A2100M |
| Manufacturer | Lockheed Martin Space |
| Launch mass | 4,500 kg (9,900 lb) |
| Dimensions | 15 m x 6.7 m x 6.1 m |
| Start of mission | |
| Launch date | 21 January 2017, 00:42 UTC[2] |
| Rocket | Atlas V 401 (AV-066) |
| Launch site | Cape Canaveral, SLC-41 |
| Contractor | United Launch Alliance |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Geostationary orbit |
| Instruments | |
| 2 SBIRS sensors | |
USA-273, also known as SBIRS GEO-3,[1] is a United States military satellite and part of the Space-Based Infrared System (SBIRS).
- ^ a b "SBIRS GEO-1, -2, -3, -4". Gunter's Space Page. 4 November 2020. Retrieved 16 May 2021.
- ^ "Atlas 5 rocket successfully delivers vital national asset into space". Spaceflight Now. 21 January 2017. Retrieved 16 May 2021.
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