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Re: (IAAC) estimating magnitudes
Dear Mark,
> http://archive.eso.org/skycat/servers/usnoa
> This site will give a printout like the one that follows. I have two
> questions that I hope someone can answer. How do you convert the right
> ascension format used below to the one that uses actual hours and
> minutes? Also, how do red and blue magnitudes generally compare to
> visual magnitudes?
>
The first question is rather simple. The format uses 360 degree's for the RA
instead of the 24 hours. Hence you need to divide the degree value by 15
(24x15=360) to get the hours and the remainder you have to multiply by 60 to
get the minutes and so on.
The other question I do not know the answer. The main sensitivity of the
human eye lies around the green-yellow part of the spectrum during night.
Maybe a good start would be to take the avaerage of the two magnitudes (just
a guess).
Regards, Josch
> Thanks,
> Mark
>
> nr ID ra dec r_mag b_mag qual field gsc
> d' pa
> 1 U0975_06559340 161.03434 11.70866 19.1 19.8 0 00491 -
> 0.063 71.537
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