| Name of Satellite, Alternate Names | NSS-12 |
| Country of Operator/Owner | Netherlands |
| Operator/Owner | SES (Société Européenne des Satellites (SES)) |
| Users | Commercial |
| Purpose | Communications |
| Class of Orbit | GEO |
| Type of Orbit | |
| Longitude of GEO (degrees) | 57 |
| Perigee (km) | 35779 |
| Apogee (km) | 35793 |
| Eccentricity | 0.00016604990985862 |
| Inclination (degrees) | 0.06 |
| Period (minutes) | 1436.08 |
| Launch Mass (kg.) | |
| Dry Mass (kg.) | 5624 |
| Power (watts) | |
| Date of Launch | 29-10-2009 |
| Expected Lifetime | 15 yrs. |
| Contractor | Space Systems/Loral |
| Country of Contractor | USA |
| Launch Site | Guiana Space Center |
| Launch Vehicle | Ariane 5 |
| COSPAR Number | 2009-058A |
| NORAD Number | 36032 |
| Comments | 48 Ku-band, 40 C-band transponders. |