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    Re: Minimum Altitude for Daytime Venus
    From: Paul Jackson
    Date: 2015 Nov 19, 00:00 -0800

    I use  a Astra 3 B with 4 x 40 scope and a Whole Horizon Mirror fitted to  shoot Venus during the day. I have lost count of how many times i have had intercepts of under 1 nautcal mile with the odd 0.0 turning up on occasion . When i see the bright speck of light that is Venus  i am always satisfied with a job done to the best of my ability.

    Gregs Rudzinski's mention of using a Sun Spot to focus to infinity is a fantastic tip  that i am eager to put into practice.

    If Nav list members are interested i have numerous daytime Venus sights fully hand documented with all the working and plot .I use HO:229 with the Nautical Almanac. After doing the long hand stuff i cross check results with Star Pilot and  Navigator software both of which are superb and user friendly pieces of software.

    I have managed to shoot Jupiter during the day once or twice , one need a very clear sky to get this done.

    Compared to the legends of Astro Nav found on Nav List I am but a hack .

    Kind Regards , Paul Jackson.

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