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    Re: The Orion North Arrow
    From: David Pike
    Date: 2017 Feb 11, 03:31 -0800

    Frank.  This is very useful to know, because Polaris is not a particularly bright star and is difficult to find thorough thin cloud, light pollution, or for those whose vision is not what it used to be.  The Orion constellation, on the other hand, stands out much better in marginal conditions.  In scattered cloud, if Polaris is obscured Orion often isn’t and vice versa.

    However, as described, that wouldn’t have been much use to me last time I spotted Orion (a few days ago), because he was roughly south of me at 53.10N, so I would have had to move my eyes over my head through my zenith to find north.  Then I realised I didn’t need to.  If the tip of the arrow points roughly north, the tail of the arrow must point roughly south.  I'll check next time he appears.

    I’m still trying to work out what you mean by ‘your thumb’s inclination’ and how it can indicate your latitude?  Inclination to what?  DaveP

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