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    Re: A-12 Experiences
    From: Ed Popko
    Date: 2020 Feb 9, 17:06 -0800

    Geoffrey,

    You described the bubble this way: tilt invarient. Explain a bit more.  

    To center a body, I first pre-calculate/estmate what the Hs will be.  I then center the bubble and then rotate the octant about it's vertical axis, swinging it left and right expecting the body to flash by the bubble chamber. When I have the right Zn, I then refine the arc to place the body in the middle of the bubble. Often, swinging the octant pushess the bubble off center so I have to juggle it back to the center.

    The sun and full moon fit nicely in the bubble. Bright stars look great too when they are dead centered.

    Ed

       
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