Vega 2 (along with Vega 1) 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. The name VeGa (ВеГа) combines the first two letters of the Russian words for Venus (Венера: "Venera") and Halley (Галлея: "Galleya"). They were designed by Babakin Space Centre and constructed as 5VK by Lavochkin at Khimki. The craft was powered by large twin solar panels. Instruments included an antenna dish, cameras, spectrometer, infrared sounder, magnetometers (MISCHA) and plasma probes. The 4,840-kilogram (10,670 lb) craft was launched on top of a Proton-K from Baikonur Cosmodrome, Tyuratam, Kazakh SSR.

Wikipedia: https://en.wikipedia.org/wiki/Vega_2. Related NASA reference: https://nssdc.gsfc.nasa.gov/planetary/chronology.html#1984. Description adapted from Wikipedia contributors (CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0/).