Twin paradox with 1 light-year separation at 0.5c

[almarino dtd]

TL;DR

no acceleration

A and B 1 lyr apart and sync watches, C moving at .5 C, when at B, C sync watch with B, what time does A and C's watch show when meet. (I was told answer already here but could not find).

 

[Ibix]

If an object travels a distance $\Delta x$ in a time $\Delta t$ then the time it experiences is $\Delta\tau=\sqrt{\Delta t^2-\Delta x^2/c^2}$. You've specified $\Delta x$ and $v$. Can you determine $\Delta t$, the travel time as measured by the planets? If so, you should be able to deduce the elapsed time for the traveller, $\Delta\tau$.