| Name of Satellite, Alternate Names | Rapid Pathfinder Program (NROL-66, USA 225) |
| Country of Operator/Owner | USA |
| Operator/Owner | National Reconnaissance Office (NRO) |
| Users | Military |
| Purpose | Technology Development |
| Class of Orbit | LEO |
| Type of Orbit | Polar |
| Longitude of GEO (degrees) | 0 |
| Perigee (km) | 1199 |
| Apogee (km) | 1202 |
| Eccentricity | 0.000198137507430157 |
| Inclination (degrees) | 90 |
| Period (minutes) | 109.42 |
| Launch Mass (kg.) | 350 |
| Dry Mass (kg.) | |
| Power (watts) | |
| Date of Launch | 06-02-2011 |
| Expected Lifetime | |
| Contractor | National Reconnaissance Laboratory |
| Country of Contractor | USA |
| Launch Site | Vandenberg AFB |
| Launch Vehicle | Minotaur 4 |
| COSPAR Number | 2011-006A |
| NORAD Number | 37364 |
| Comments |