[AZ-Observing] Re: McNeil Nebula BVRI field photometry

[BillFerris@xxxxxxx]

Thanks, Brian, for sharing the sequence around McNeil's nebula.
As an FYI for the list, the RA can be converted to the traditional 
hours:minutes:seconds format by dividing the listed coordinate by 15, then by 
multiplying each tenths remainder by 60. For example, the RA of the first star 
is listed 
as 86.458215. Divided by 15, this becomes 5.763881 hours. Multiplying the 
first tenths remainder by 60 (.763881*60) yields 45.83286 minutes. Applying the 
tenths conversion to this product's remainder yields 50 seconds. So, the 
converted value is 05h 45m 50s, in the hours:minutes:seconds format.

The conversion for the declination coordinate is to multiply the number by 
60. Again, using the first star's coordinate as an example: -0.120680*60 = 
-7.608. So, the converted value is -00d 07.6m.

Regards,

Bill
=======
Bill Ferris
"Cosmic Voyage: The Online Resource for Amateur Astronomers"
URL: http://www.cosmic-voyage.net


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[AZ-Observing] McNeil Nebula BVRI field photometry

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