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Bill,
The small distances like that, Castor-Pollux
and delta-zeta Orion are time independent.
I mean refraction does not change them by more
than 0'05 because the distances are small.
Tell me the coordinates of delta, zeta Orion
you used, and I will compare our calculations.
(They are not in the Almanac, where did you get them from?)
Alex
On Thu, 4 May 2006, Bill wrote:
>
> Alex wrote:
>
> > I use two pairs, one is Castor-Pollux, 4d30'.3 apart, another
> > delta-zeta Orion, 2d44'.2 apart.
>
> Alex
>
> For what date and time (local) did you calculate the delta-zeta Orion pair?
> I tried it for today between 15 to 45 minutes after sunset (seems to get too
> low after that) and wind up in the 2d 47.8' neighborhood. Can't find my
> mistake.
>
> This is getting me crazy. Went to Omars site to pick up Hc's for delta-zeta
> Orion. http://www.tecepe.com.br/scripts/AlmanacPagesISAPI.isa
>
> Using the Hipparcos Catalogue the closet star I could to delta Orion for
> that SHA range and declination starting in Od was Mintaka. I could not see
> a delta Orion on Omars site.
>
> I don't see anything matching Mintak's name or specifications in the
> almanac.
>
> Anyone. What am I missing?
>
> Bill
>
