[mrjesse]

No you are lying Fichori. My claim was that the actual position is not the same as the apparent position. It was mrjesse who was computing the actual angles.

Sorry LeGrande, you made TWO claims -- one was that the sun wasn't where it appeared to be, and the other was that it was apparently 2.1 degrees behind it's actual position for an observer on earth at ant instant in time.

As soon as I learned about Stellar Aberration and the famed ~20 arcseconds, I have freely and happily granted that the sun is not exactly where it appears. On that argument you won -- the data backed you up! I have over and over admitted or more correctly stated cheerfully that the sun is apparently displaced about 20 arcseconds. That argument is done!

But that doesn't remove the fact that you made the other argument - about 2.1 degrees - and that it was wrong! Just because you make one claim that is true (even if the reason you attributed it to was completely wrong) doesn't mean any other statements you make are true!

How else can I make that clear? I'm not arguing that the sun isn't apparently displaced by ~20 arcseconds due to stellar aberration! That one's done! I'm arguing that the sun is NOT displaced by 2.1 degrees -- or any other similar amount due to your claimed reason.

So why not grow up and quit fussing about the arguments you already won and go onto the ones that we don't agree on?

-Jesse

[TrevorSnowsrap]

I think that’s a fairly good summary though I haven’t read through this entire sub-thread.

Threre is displacement of the measured position of the sun due to rotation of the earth (Diurnal aberration) but apparently it’s much smaller than the effect due to the earth’s orbit around the sun (Annual aberration).

” Its effect is much smaller than that of annual aberration, and is only 0”.32 in the case of an observer at the equator, where the rotational velocity is greatest.”