[AZ-Observing] Re: MESSIER 2 declination error
- From: Stan Gorodenski <stanlep@xxxxxxxxxxxxx>
- To: az-observing@xxxxxxxxxxxxx
- Date: Tue, 29 Jul 2008 10:31:51 -0700
AJ,
Tonight I will check this out on my 16" scope.
Stan
AJ Crayon wrote:
>Has anyone had problems locating M2 with digital setting circles or a GoTo
>system? This involves any of the electronic systems.
>I have run across declination errors with this entry on the XP4 Flash Sky
>Commander digital setting circles and on Orions SynScan GoTo system. Reason
>is because the declination is -0° 49' and the way computer hardware handles
>-0. Turns out most computers convert -0 to +0 resulting in incorrect
>calculations.
>
>I corrected my version of XP4 with an update the the Messier catalog when this
>was discovered some time ago. I have just found the problem in the SynScan
>system and notified Orion this morning.
>
>So, I ask, has anyone else had problems with their system finding M2?
>
>AJ Crayon
>Phoenix, AZ
>
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