VEGA 2 BUS
| Launched | 20 December 1984 | 
| Flight ended | – | 
| Status | Unknown | 
| Launch site | Tyuratam Missile and Space Center, Kazakhstan (Also known as Baikonur Cosmodrome) | 
| Owner | Commonwealth of Independent States (former USSR) | 
| NORAD ID | 15449 | 
| COSPAR ID | 1984-128A | 
| Observing | 
Timeline
| 1984 Jun 13 | – | Descent module separated from flyby probe | 
| 1984 Jun 15 | – | Descent module entered Venus's atmosphere | 
| 1984 Jun 15 | – | Balloon deployed into Venus's atmosphere | 
| 1984 Jun 15 | – | Lander mission ended, after returning data from the surface for 56 minutes | 
| 1984 Jun 15 | – | Balloon mission ended | 
| 1984 Jun 15 | – | Orbiter flyby of Venus | 
| 1984 Dec 21 | – | Launch from Site 200/40 at the Baikonur Cosmodrome | 
| 1986 Mar 9 | – | Flyby of Comet 1P/Halley | 
| 1987 Mar 24 | – | Last contact with the flyby probe |