Vega 1

Country: Soviet Union
Mission: Venus Lander, Venus Balloon, Comet Halley Flyby
Launched: December 15, 1984
Launch Vehicle: Proton
Spacecraft Mass: 4,920 kg at launch
Arrival:

Venus - June 11, 1985

Halley's Comet - March 6, 1986

Payload:

Lander:

Malachite Mass Spectrometer
Sigma 3 Gas Chromatograph
VM-4 Hygrometer
GS-15-SCV Gamma-Ray Spectrometer
UV Spectrometer
BDRP-AM25 X-Ray Fluorescence Spectrometer + Drill
ISAV Nephelometer/Scatterometer
Temperature & Pressure Sensors
IFP Aerosol Analyzer

Balloon:

Temperature & Pressure Sensors
Vertical-Wind Anemometer
Nephelometer
Light Level/Lightning Detectors

Bus:

TV System
IR Spectrometer
UV, Visible, IR Imaging Spectrometer
Shield Penetration Detector
Dust Detectors
Dust Mass Spectrometer
Neutral Gas Mass Spectrometer
Plasma Energy Analyzer
Energetic Particle Analyzer
Magnetometer
Wave & Plasma Analyzers

End of Mission:

Lander - June 11, 1985

Balloon - June 13, 1985 Notes: First Venus Balloon, First Close Halley Flyby