| Name of Satellite, Alternate Names | Eutelsat 172A (GE-23, AMC-23, Worldsat 3, Americom 23) |
| Country of Operator/Owner | Multinational |
| Operator/Owner | European Telecommunications Satellite Consortium (EUTELSAT) |
| Users | Commercial |
| Purpose | Communications |
| Class of Orbit | GEO |
| Type of Orbit | |
| Longitude of GEO (degrees) | 172.06 |
| Perigee (km) | 35772 |
| Apogee (km) | 35799 |
| Eccentricity | 0.000320242910177794 |
| Inclination (degrees) | 0.01 |
| Period (minutes) | 1436.1 |
| Launch Mass (kg.) | 5000 |
| Dry Mass (kg.) | |
| Power (watts) | 13000 |
| Date of Launch | 29-12-2005 |
| Expected Lifetime | 16 yrs. |
| Contractor | Alcatel Alenia Space |
| Country of Contractor | France/Italy |
| Launch Site | Baikonur Cosmodrome |
| Launch Vehicle | Proton M |
| COSPAR Number | 2005-052A |
| NORAD Number | 28924 |
| Comments | Hybrid C/Ku-band satellite. 20 Ku-band, 18 C-band transponders. Broadcast, Internet, business; Ku-band tailored to broadband for Boeing Connexion; Pacific region. |