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International Ultraviolet Explorer

Spacecraft
International Ultraviolet Explorer, was the first space observatory primarily designed to take ultraviolet electromagnetic spectrum. Wikipedia
Launch date: January 26, 1978 at 12:36 PM EST
Orbit height: 26,234 mi
COSPAR ID: 1978-012A
Launch mass: 669 kg (1,475 lb)
Mission duration: 18 years, 8 months, 4 days
Power: 424 watts
Reference system: Geocentric orbit