| Name of Satellite, Alternate Names | Iridium 77 (Iridium SV077) |
| Country of Operator/Owner | USA |
| Operator/Owner | Iridium Satellite LLC |
| Users | Government/Commercial |
| Purpose | Communications |
| Class of Orbit | LEO |
| Type of Orbit | Polar |
| Longitude of GEO (degrees) | 0 |
| Perigee (km) | 776 |
| Apogee (km) | 780 |
| Eccentricity | 0.000279798545047566 |
| Inclination (degrees) | 86.4 |
| Period (minutes) | 100.4 |
| Launch Mass (kg.) | 689 |
| Dry Mass (kg.) | 556 |
| Power (watts) | 1,400 (EOL) |
| Date of Launch | 08-09-1998 |
| Expected Lifetime | 8 yrs. |
| Contractor | Motorola Satellite Communications Group |
| Country of Contractor | USA |
| Launch Site | Vandenberg AFB |
| Launch Vehicle | Delta 2 7920 |
| COSPAR Number | 1998-051E |
| NORAD Number | 25471 |
| Comments |