Suisei
Space probe
Suisei, originally known as Planet-A, was an uncrewed space probe developed by the Institute of Space and Astronautical Science. Wikipedia
Launch date: August 18, 1985
Manufacturer: Institute of Space and Astronautical Science
Distance: ~900,000 km (560,000 mi)
Launch mass: 139.5 kg (308 lb)
Mission duration: 5 years and 5 months (launch to fuel depletion)
Reference system: Heliocentric
Rocket: M-3SII