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    Re: "Horns" of the Moon are relatively horizontal?
    From: Tony Oz
    Date: 2018 Aug 1, 06:15 -0700

    Hello!

    Searching the internet for the converter rotation angle formula gave me this one:

    • angle = arctan(sin(LHA) / tan(Lat))

    I guess it cannot be the same as the formula for the Moon's horn - it is for the objects with Dec == 0°.

    So my un-tested candidate for the "Moon horns" formula would be:

    • angle = arctan(sin(LHA) / tan(ZD)); where ZD == Moon's zenith distance.

    Will have to check it with some meaningful input values...

    Warm regards,

    Tony

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