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    GMT by Lunar Distance in Guatemala
    From: Frank Reed
    Date: 2020 Mar 17, 12:59 -0700

    There's a fun photo of the crescent moon that's been making the rounds and appeared as "Astronomy Photo of the Day" yesterday. It's an interesting case where one can do a lunar digitally. Can you figure out the date and time (and anything else) from this photo? Copy below, better image with some details here: https://apod.nasa.gov/apod/ap200316.html. To get you started, the bright star near the upper right margin of the image is omega Ophiuchi. The faint star just below the Moon is HIP 81754. So what is the UT/GMT within a minute or so? What is the uncertainty? Hint: simulate it in Stellarium (desktop version).

    Frank Reed

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