NavList:

Excellent Randall !

I too did a few Jupiter Moon lunars during yesterday's evening twilight. A set of 9 observations averaged out to -0.4' error with a spread of 0.7'. All observations were negative error. This could be residual index error and or personal error. Centering in the field of view is always a challenge. Maintaining a good focus can be a factor because of the eye brow bumping the rubber ocular.

One more thing to try. Use both hands so that the left is supporting and the right is assisting the support while rocking the arch.

and, just like in golf, if the wind is blowing performance will be compromised ;-)

Greg Rudzinski

Re: With your help Lunars are getting better
From: Randall Morrow
Date: 2013 May 15, 07:48 -0700
Greg,
Thanks for the suggestions. Last night I did 4 sets of Moon-Jupiter runs with 5 sights each. I held the sextant frame in my left hand with an elbow propped on the arm of a chair while I turned the micrometer with my right hand. With each shot I tried to split the round planet image with the limb of the Moon.
Here are the averaged results:
8-29-04 29*31.7 Error LD 0.1’ Error Lo 03.2’
8-34-28 29*33.9 Error LD 0.3’ Error Lo 09.7’
8-39-10 29*35.7 Error LD 0.4’ Error Lo 11.5’
8-44-31 29*37.4 Error LD 0.1’ Error Lo 03.5’

Moon sun sights are still not too good but Moon-planets look better.
Thanks!
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