It's... Vega! (Vega 1, to be precise...)
Vega 1 & 2 were launched in 1985, and were the final 2 Venera-style probes. They each arried a Venus surface lander & atmospheric balloon probe, but also were to fly by comet Halley in 1986. I've made an xyz from an old .trj format file I found on the NSSDC FTP site, so it's not great, but it does the job. (They don't have any trajectory for Vega 2).
I've also made 2 models, one showing Vega with the Venus probe attached, and the other for after it had deployed. These models are converted from VRML, from this site: http://vsm.host.ru/e_vrml.htm However, they had to be highly modified to get the .3ds to look like the .wrl file, and nearly all the parts are new, just the design is the same. Anyway, thanks VSM!
You can download the xyz & model from the Spacecraft page on my site http://homepage.eircom.net/~jackcelestia/ , and also you can get a comet Halley xyz for 1986, from the Other xyz's & ssc's page.
But before you do so, check out some screenshots...
Before the probe deployment:
(That pic uses a very small FOV, it doesn't actually get that close to Venus- sorry...)
And after the venus part of the mission:
I should also explain about the flags on the Spacecraft page- Vega was almost entirely a Soviet
mission, but the French 
provided a few experiments for the surface probe, so I think they deserve a mention. Don't you?!
Enjoy!
