Re: Questions about annual aberration and annual parallax of stars

In article <1155014460.883383.222230@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
"subhash" <scjain108@xxxxxxxxx> writes:
The
value of the major axis of aberrational ellipse is 20.47 as a constant

That's the value at the ecliptic pole. For other positions, you get
a projection of this ellipse.

I expect any textbook on astrometry will cover both aberration and
parallax in detail. I tried searching "astrometry" and "positional
astronomy" at Amazon and got some hits, but it wasn't easy to tell
which books are any good, and a lot of them are expensive.

Your best bet might be to browse through a university library. Jean
Meeus has written several books on practical calculations, but I
don't know which if any of them covers precession and aberration in
detail. Our library owns _Modern Astrometry_ by Jean Kovalevsky;
maybe you could get it on interlibrary loan. Or maybe other posters
here will have better recommendations. You might try the link at the
bottom of this message, though I don't guarantee it will work.

http://www.amazon.com/gp/product/sitb-next/0521642167/ref=sbx_rec/102-3517725-9136940?ie=UTF8#bort

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Steve Willner Phone 617-495-7123 swillner@xxxxxxxxxxxxxxx
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