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Submillimeter Wave Astronomy Satellite

Spacecraft
Submillimeter Wave Astronomy Satellite is a NASA submillimetre astronomy satellite, and is the fourth spacecraft in the Small Explorer program. It was launched on 6 December 1998, at 00:57:54 UTC, from Vandenberg Air Force Base aboard a Pegasus XL... Wikipedia
Launch date: December 5, 1998 at 7:57 PM EST
Dimensions: 1.63 × 1.02 m (5 ft 4 in × 3 ft 4 in)
Launch mass: 288 kg (635 lb)
Mission duration: 2 years (planned); 6 years, 8 months and 26 days (achieved)
Power: 230 watts
Spacecraft: Explorer LXXIV