Re: (IAAC) Burnham's Stars

Skymap and Celestia both use the Hipparchos and the Tycho Catalogues for
their information concerning the various properties of the stars they
display, therefore it would seem that any differences are likely to be found
within these rather than the software used to access the information, oddly
enough, although the Skymap (pro9) information box about Almach lists it as
a B8V star the program actually displays the two elements as a White star
and an Orange star (as pointed out by Lew), so I would guess that the white
star is now considered the Primary and as such is what the Tycho and
Hipparchos Information is based on, whereas the Orange star being less
bright is relegated to the secondary position, this was apparently not the
case in whichever Catalogue (Yale?) that Burnham was using as a refrence
source. I suspect this is the reason for the anomaly rather than any mixing
of the spectrums

Does this make sense, it seems a reasonable explanation to me ( not that I
would have arrived at it without some prompting!!)

Kim Gowney.

----- Original Message -----
From: <FiskeM3@aol.com>
To: <netastrocatalog-announce@atmob.org>
Sent: Wednesday, January 22, 2003 2:39 PM
Subject: Re: (IAAC) Burnham's Stars

> Ron:
> I've noticed a problem with some doublestar listings in the software I
use -- StarMap Pro 8.0. What seems to be going on is that the software
assumes the star name (whatever catalog designator is used to identify the
object) is unique. If more than one record in the database has the same name
(the same value in the name field) I only see the information for the first
item. This is particularly noticeable for multiple stars with more than 2
components -- the C, D, etc. elements simply show the same values as the A,
B pair.
> The problem can manifest itself in different ways, though.
> Anyway, one possible explanation for the problem you have found is that
you're only seeing the companion star spectrum due to issues with the
stellar database used by your program.
> Fiske
> Kansas City
> PS: Another thing I've noticed is that when I select the option to hide
Hubble Guide Stars for non-stellar objects (like galaxies!), they don't all
turn off. In other words, some galaxies are still displayed with an HGS
superimposed on them. Another database flake.
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