Vega 2
Space probe
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Vega 2 was a Soviet space probe part of the Vega program to explore Halley's comet and Venus. The spacecraft was a development of the earlier Venera craft. Wikipedia
Launch date: December 21, 1984 at 4:13 AM EST
Landing date: 03:00:50, June 15, 1985
Landing mass: 1,520 kg (3,350 lb)
Last contact: March 24, 1987
Mission duration: 56 minutes (lander); ~2 days (balloon); 2 years, 3 months and 3 days (orbiter)
Reference system: Geocentric
Rocket: Proton 8K82K