Re: [nbos] Stellar Radius - Mass - Luminosity Parameters.
"Dalton Calford"
Wed Feb 27th, 2008
It might be easier to give you a copy of the spread sheet.
What spread sheets programs do you have?
I can also format up the data as a series of sql statements if you wish.

On Wed, 2008-02-27 at 18:51 +0000, Mike Oliver wrote:
> I don't know if this is helpful but, from Norton's Star Atlas (Epoch
> 1950), I quote the following: "'Type B', 'Type A', etc, when used in
> the general sense, or in statistical work, does not usually mean the
> series B0 to B9, or A0 to A9, but an average Type, in which A0, B0,
> etc., are approximately central, including the latter half of those
> lettered in the Type earlier, just as ‘2nd magnitude’ is not 2.0 to
> 2.9 but 1.5 to 2.5.”
>
>
>
> I believe that, in addition, some stars are designated A0 II-III which
> could mean either that the star can not be definitely placed either as
> a II or a III. Also stars with variable spectra can have a “v”
> appended and the specific sub-category omitted. However, I can’t say
> for sure that this is a general rule.
>
>
>
> Certainly, where there are doubts about anything, I think there is a
> tendency for the astronomer using the terminology to be vague.
>
>
>
> Could you give me any catalogue references for any of these stars and
> I’ll see if I can get anything more specific.
>
>
>
> Cheers,
>
>
>
> Mike
>
> www.cartography-services.co.uk
>
>
>
> -----Original Message-----
> From: nbossoftware-bounces-at-nbos.com
> [mailto:nbossoftware-bounces-at-nbos.com] On Behalf Of Dalton Calford
> Sent: 27 February 2008 16:36
> To: nbossoftware-at-nbos.com
> Subject: Re: [nbos] Stellar Radius - Mass - Luminosity Parameters.
>
>
>
> I have many stars in my list that are just listed in a manner such as
>
> "A" instead of "A0I"
>
>
>
> I guess the astronomers where saying it is a type A star but that they
>
> could not determine exactly what kind.
>
>
>
> How should I treat these stars?
>
>
>
> Does anyone have any suggestions?
>
>
>
>
>
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