Hi,
I noticed that when I have two stars, A and B and let CdC calculate the
distance and Position Angle (PA) between them the order in which I
select them matters. I would expect the PA from A to be plus the PA from
B to A to be 360 but it's not. One particular example is this one:
From "GSC 4048-102" to "BSC HR860"
Separation: +00°30'51.0" PA:297°
Offset: -0h03m50.4s +00°13'55"
and
From "BSC HR860" to "GSC 4048-102"
Separation: +00°30'51.0" PA:116°
Offset: 0h03m50.4s -00°13'55"
The distance is the same (thankfully :) but together the PAs don't make
360. I'm probably not understanding PA properly. Can someone explain it
please or send me a link to an article that I should read? I've googled
the subject a bit and I'm not finding fault with my reasoning yet.
Thanks!
Sander
