blobrana wrote:
Hum,
To figure it roughly don't bother with Spherical trigonometry,
Just use standard 2d coordinates with Pythagoras theorem...
Lol, that's what I was going to say for about half a second after I read the original question, then I realised it wouldn't work and I was too lazy to put any more thought into it :-P
It'll be close sometimes if the stars are on the same side of the sun, but falls all to hell once you try using it for stars on the other side. :-)