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Old 26-02-2016, 01:10 AM
kens (Ken)
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kens is offline
 
Join Date: Oct 2014
Location: Melbourne, Australia
Posts: 314
So tonight I started to use the scope to polar align experimentally. Plate solving was good to get close to the pole. But then I hit a snag as I was looking at Stellarium with JNOW coordinates whilst astrometry was giving the position in J2000. Until I realised what was going on I was puzzled as to why I appeared to be at the pole visually in Stellarium while astrometry wsa telling me I wasn't. The difference is about 4 arc-minute which is signficant. It seems it would be easiest to just use the nearest asterism and visually centre on the pole in relation to that. BQ Octanis is almost exactly 10 arc-minutes from the pole and was easily visible in the scope. I was about to try that when the clouds rolled in.
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