| Name of Satellite, Alternate Names | Galaxy-18 |
| Country of Operator/Owner | USA |
| Operator/Owner | Intelsat, Ltd. |
| Users | Commercial |
| Purpose | Communications |
| Class of Orbit | GEO |
| Type of Orbit | |
| Longitude of GEO (degrees) | -123.02 |
| Perigee (km) | 35774 |
| Apogee (km) | 35798 |
| Eccentricity | 0.000284656988329063 |
| Inclination (degrees) | 0.02 |
| Period (minutes) | 1436.1 |
| Launch Mass (kg.) | 4642 |
| Dry Mass (kg.) | |
| Power (watts) | |
| Date of Launch | 21-05-2008 |
| Expected Lifetime | 15 yrs. |
| Contractor | Space Systems/Loral |
| Country of Contractor | USA |
| Launch Site | Sea Launch (Odyssey) |
| Launch Vehicle | Zenit 3SL |
| COSPAR Number | 2008-024A |
| NORAD Number | 32951 |
| Comments | Advanced cable television and data, North America; 24 Ku-band, 24 C-band transponders. |