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    Re: Daytime Venus Rising Dip Short
    From: Greg Rudzinski
    Date: 2012 May 4, 08:14 -0700

    That's pretty good bubble work Gary !

    Is the MA-2 scope 2 or 3 power ? I can only see daytime Venus with the MK 5 just before sunset. It seems that Venus is easier to spot when the eyes get adjusted to infinite focus. If the scope is out of focus then there is no chance so focusing on the Sun or Moon seems to be a good check for that.

    Greg Rudzinski


    [NavList] Re: Daytime Venus Rising Dip Short
    From: Gary LaPook
    Date: 4 May 2012 00:48
    I took three daytime Venus observations with my MA-2 bubble sextant. I had never been able to spot a planet with my bubble sextants before. The secret for daytime planet observations is precomputing the altitude so that you can set it on your sextant and then sweep the approximate azimuth, This goes for using a marine sextant too and I have been able to see Venus in my Tamaya before.

    The MA -2 produced very good results.

    April 16, 2012 local date.

    17:42:42 local time, 00:42:42 Z, April 17, 2012

    From the Navy website:

    Celestial Navigation Data for 2012 Apr 17 at 0:42:42 UT

    For Assumed Position: Latitude N 34 16.6
    Longitude W 118 54.0
    GHA DEC Hc ZN
    VENUS 147 04.8 N26 30.2 +64 34.6 259.9 | -0.5 0.3 0.1 -0.1
    :Hs 64 38
    IC - 2
    Corr 0 (-0.1)
    Ho 64 36
    Int 1.4 T

    Celestial Navigation Data for 2012 Apr 17 at 0:43:12 UT
    VENUS 147 12.3 N26 30.2 +64 28.5 260.0 | -0.5 0.3 0.1 -0.1

    Ho 64 29.5
    Int 1.0 T

    Celestial Navigation Data for 2012 Apr 17 at 0:43:49 UT

    VENUS 147 21.6 N26 30.2 +64 20.9 260.1 | -0.5 0.3 0.1 -0.1

    Ho 64 21

    INT 0.1 T

    I suppose that I should say the intercepts were 1 T, 1 T
    and zero since I can't measure to one-tenth of a minute.

    I'm pretty happy with these results.

    gl
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