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Explorer 61

Explorer 61

Spacecraft
Magsat was a NASA/USGS spacecraft, launched on 30 October 1979. The mission was to map the Earth's magnetic field, the satellite had two magnetometers. The scalar and vector magnetometers gave Magsat a capability beyond that of any previous... Wikipedia
Launch date: October 30, 1979 at 9:16 AM EST
Orbit height: 249 mi
Cost: 19.7 million USD (1989)
Launch mass: 158 kg (348 lb)
Mission duration: 7.5 months (achieved)
Spacecraft: Explorer LXI