600 years it'd take us to get there, so if we left now, we'd get there in 2611, that's a good ol' trip, where 'Are we there yet' will get overused before you get to Mars.
A light year = The distance light travels in the period of one year.
The top speed for a spaceshuttle..17,500mph
The speed of light..670,616,629 mph (legit number), which is 38,320 times faster than the fastest spacecraft we have ever managed to produce. We means, that 600 year trip you just calculated turns out to be the 22,992,000 year trip it would take assuming no pit stops (note: going top speed with an object that weighs approx. 2200 tons [4400000lbs] doesn't exactly get great gas milleage). Sooo..better pack a lunch and some extra fuel.