Dimensions (booms stowed)	Length Width Height	3.2 m 3.3 m 2.1 m
Mass	Total at launch Scientific payload Payload cover ejected Initial fuel (hydrazine) Fuel at May 2002	366.7 kg 55.1 kg 0.1 kg 33.5 kg 8.4 kg
Stabilization	Spin-stabilized	5 rpm
Power	Radio-isotope thermoelectric generator (RTG) Beginning of mission December 1997	283 W 232 W
Communications	X-band downlink S-band uplink/downlink	20 W 5 W
Communications antennas	Parabolic high gain 2 low gains	1.65 m
Maximum telemetry rates	Real-time Recorded	1024 bps 512 bps
Booms	Radial dipole antenna Axial monopole antenna Radial magnetometer boom	72.5 m 7.5 m 5.6 m