Quote:
Originally Posted by richardda1st
I'm having trouble getting the azimuth to read as per Stellarium & Cartes du Ciel software.
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Hi Richard,
On Cartes du Ciel ...
Select Preferences -> Date/Time and set Time=UTC + 11
Check that the local time displayed in that menu is the current local time
(i.e. Australian Eastern Daylight Time).
Select Preferences -> Position of Observatory
Again set Time=UTC + 11.
Set your Latitude and Longitude.
Quote:
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... and as I am 5.5degrees west of AEST at 150d I also move my time back by 22 minutes (5.5x4)
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Don't do this. Simply enter your local Australian Eastern Daylight
Time. Cartes du Ciel will internally compute what is known as your Local
Apparent Sidereal Time (LAST) for you based on UTC time (which is
computed by the arithmetic when you entered TIME=UTC + 11)
and your longitude, plus corrections for some other jazz you don't need
to know about such as correction of UTC to UT1 and correction for nutation
provided by what is known as the equation of the equinoxes.
In a nutshell ...
Upon entering your correct time zone (UTC + 11) and upon ensuring that Cartes
du Ciel displays the correct local time in the Date/Time menu and upon
entering UTC+11 and your Lat/Lng in the Position of Observatory menu,
Cartes du Ciel will correctly compute the topocentric Az/Alt positions of
objects for you.
Best regards
Gary Kopff
Mt Kuring-Gai