| Launch Vehicle | Delta II 7425 Spin-Stabilized Star 48 Upper Stage |
|---|---|
| Spacecraft Mass | 643 kg |
| Key Dates | December 10, 1998: Launch Date September 23, 1999: Mars Orbit Insertion September 23, 1999: Mars Aerobraking Begins November 22, 1999: Mars Aerobraking Ends December 1, 1999: Transfer to Mapping Orbit December 2-3, 1999: Mars 98 Lander Support March 3, 2000: Mars Mapping Begins January 15, 2002: Mars Relay Mission Begins December 1, 2004: End of Mission |
| Science Payload | Pressure Modulator Infrared Radiometer (PMIRR) Mars Color Imager (MARCI) |
