434 kilometers per second, just shy of 1million MPH on my way out of the solar system towards parts unknown. The probe survived the explosion of a gigantic rocket about 30k meters above Kerbin and was catapulted right out of the solar system. While laughing my ass off at this and speeding up time to see just how far it was going to go my entire huge masterpiece space station crashed to the ground without me noticing. I went back to the space center and it was nowhere to be found. What I get for warping at 10,000 and 100,000 I guess. There went about a dozen launches, hours of game play, and 10 or so Kerbonauts. Still worth it.