I was surprised to see how different sources have wildly different estimates of distances to stars. Obviously stellar parallax is a little loose, but some of these show really gross differences. I know many of the more distant stars are going to be difficult, but why the huge variations on what seem to be recent lists?
I have seen differences in Rigel's distance varying from 500 light years to 900. Betelgeuse: 300 to 600. Canopus: 98 to 1200, (yeah, twelve hundred).