Since the object is 6000 light years away, we see it as it was then. (and where it was then)
During that time it has moved in our general direction at the rate of 250,000 miles per hour, which translates into 2.19 billion miles per year.
2.19 billion miles per year, times 6000 years equals 13.14 trillion miles.
If we divide 13.14 trillion miles by 6 trillion miles (1 light year) we get 2.19.
So over the course of 6000 years, the object has traveled 2.19 light years.
So, even though GRO J1655-40 appears to be 6000 light years away, it is in fact only 5997.81 light years away.
When I said "it is actually 2.19 years closer than it appears," I should have said it is actually 2.19 Light Years closer than it appears. Distance as opposed to time.
I also flubbed the ETA, which should be 16,428,002 years from now. (not 16,433,998)

Going away to hide now.