2015 launched in 2006. Haulin ass too. About 10 miles per second.
I was confused for a few. I couldn’t figure out why the round trip light time was going down until I realized that we are moving around to the same side of the sun.
That is zoomin’, but if memory serves, the fastest vehicle ever is the 1500+ pound Voyager 1 (38200 mph looks like 10.611111111 mps). Fuel economy is incredible on both of these probes:
http://en.wikipedia.org/wiki/Voyager_1#Current_status
Voyager 1’s current relative velocity to the sun is 17,060 m/s (61,400 km/h; 38,200 mph). This calculates as 3.599 AU per year, about 10% faster than Voyager 2. At this velocity, 73,600 years would pass before reaching the nearest star, Proxima Centauri, were the spacecraft traveling in the direction of that star. Voyager 1 will need about 14,000 years at its current velocity to travel one light year, therefore 40,000 years will pass before coming anywhere near other stars or planets. Voyager 1 is predicted to enter the interstellar medium between 2012-15, though some scientists say it will be in 2014. Voyager 1 is still the farthest man made object in the universe from Earth.