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Old 17-02-2008, 01:59 AM
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g__day (Matthew)
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Join Date: Dec 2005
Location: Sydney
Posts: 2,902
I'm learning!

I tried alignment testing with my 127mm MAK today - and tracking stars closer to the SCP.

Surprise, surprise - Tracking first Acrux then Rigel Kentarus - I did see DEC drift East in a series of 30 minute checks - so this is wierd. Tracking Sirius on my C9.25 for 3 hours - no DEC drift. Tracking Sirius on a Megrez 80 for 3 hours - minimal RA and no DEC drift. But 10 minute snaps of a star alot closer to the pole shows there is discernible DEC drift or this is some complex system of wierd mirror movement.

Anyone guess what I'm seeing? MaxPoint said I was within 40 arc second of the SCP on both axes - is that enough to show DEC drift near the pole but not further away from the pole?

PS

I probably will get a Microfeather focuser - because it will be useful for Visual, and it might help mirror shift - you never know, it certainly shouldn't hurt!

Matthew
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