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    Re: ReedNavigation
    From: Frank Reed
    Date: 2013 May 31, 17:29 -0700

    Ken Muldrew, you wrote:
    "Is the headline photo one of those trick pictures that are sometimes discussed on Navlist? Are you shooting a moon altitude with the sun on your left?"

    You have it nearly. I'm shooting a lunar (of course!). The Moon is low in the west, and the Sun is high in the SSW. Fortunately I still have the original files. This photo, and the similar one on the site, were taken on September 20, 2003 around 18:40 UT (the only watch was in the camera and in those days I didn't worry about 10 or 15 minutes time stamp error. The location is by Lake Michigan just south of the Adler Planetarium. I'm attaching a photo where you can see the micrometer as I'm lining up the lunar. It reads 67° 52' as nearly as I can tell, and I know the IC on this sextant was -1.0' back then. Plugging all that in yields a UT around 18:26:30. So now I know the camera's "watch error" on that date. It was about 14 minutes fast.

    Note that these photos were taken just under three months before I joined the NavList community and started posting about lunars.


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