To Sander A->B = B->A +/- 180° works better
Marceau --- In [email protected], Sander Pool <[EMAIL PROTECTED]> wrote: > > > 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 >
