Re: possible error in RA conversion
Posted by
Richard Lee on
URL: http://astroimagej.170.s1.nabble.com/possible-error-in-RA-conversion-tp897p899.html
Hello Karen
Thanks for getting back so quickly. As you point out, entering RA in hh.hhh format converts to the correct sexagesimal result. Problem solved.. I should read the tooltips where RA / hours clearly stated ..
I tripped over this when configuring CCD DataProcessor for Target Coordinate Source => FITS header RA/DEC (J2000). FITs images are plated solved using TheSkyX Image Link which gives image centre coordinates ra/dec both in dd.ddd format. Just to be sure .. this DP option works with decimal RA / DEC in HH.HHH / DDD.DDD format, IOW I should overwrite the ImageLink RA value by RA/15?
Regards
Richard
----Original message----
From : [hidden email]
Date : 13/11/2017 - 12:09 (GMTST)
To : [hidden email]
Subject : Re: possible error in RA conversion
Hi Richard,
The RA fields must be entered in either decimal or sexagesimal *hours*, so if you divide 306.07125/15=20.40475 and enter
that value, then AIJ gives 20:24:17.1. Does that address the problem you are experiencing?
Karen