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Old 22-01-2011, 08:51 PM
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graham.hobart (Graham stevens)
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Join Date: Nov 2008
Location: hobart, tasmania
Posts: 2,241
tracking/alignment advice

Hello, I would like to ask for some advice re. polar alignment and tracking orientation. Below is an SLR picture of M42 taken straight through an 80mm refractor so according to things I have read, it should be orientated with North down and West to the left etc. Is this right?
Looking at a series of these taken in the same orientation, same set up/night- the target drifts down (North?) and to the right (East?) over a number of frames.
M42 was in the North Western sky when I took it so when I read the article about drift it suggests because it drifts North my altitude needs lowering. Am I on the right track?
Equally so, as there is some Eastwards movement then I probably have some RA speed?PEC issues as well?
There are some complicating issues as Orion was above the ecliptic so not strictly near celestial equator. My problem is most of my Southern and Eastern sky and horizons all around to about 30' are obscured by trees.
Any tips gratefully recieved
Graham
Sorry having difficulty loading small file, suffice to say pic is orientated so M43 points to bottom right hand corner. Will try and postit soon.
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