| Name of Satellite, Alternate Names | Satellite XM Radio 4 (Blues) |
| Country of Operator/Owner | USA |
| Operator/Owner | XM Satellite Radio USA |
| Users | Commercial |
| Purpose | Communications |
| Class of Orbit | GEO |
| Type of Orbit | |
| Longitude of GEO (degrees) | -114.96 |
| Perigee (km) | 35784 |
| Apogee (km) | 35787 |
| Eccentricity | 3.55825455753105E-05 |
| Inclination (degrees) | 0.01 |
| Period (minutes) | 1436.09 |
| Launch Mass (kg.) | 5193 |
| Dry Mass (kg.) | |
| Power (watts) | 18000 |
| Date of Launch | 30-10-2006 |
| Expected Lifetime | 15 yrs. |
| Contractor | Boeing Satellite Systems |
| Country of Contractor | USA |
| Launch Site | Sea Launch (Odyssey) |
| Launch Vehicle | Zenit 3SL |
| COSPAR Number | 2006-049A |
| NORAD Number | 29520 |
| Comments | S-band Digital Audio Radio Service (DARS) to homes and automobiles in Noth America. |