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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Parallactic retardation - don't give up so easily.
From: Bruce Stark
Date: 2004 Jan 10, 11:21 EST
From: Bruce Stark
Date: 2004 Jan 10, 11:21 EST
George, Try this perspective: Put the moon on the equator, or south of it, and yourself in fairly high north latitude. During meridian passage the moon's altitude is hardly changing, and what change there is will have slight effect on her refraction and parallax correction. Even supposing the change in correction is significant, it will shift the moon vertically. Even a large change in the vertical correction will have slight effect on the distance, since it is horizontal, or nearly so. Seems to me the correction for the moon will be about the same now as it was ten minutes ago. And, while practically nothing is happening with the moon's correction, the earth is carrying you east. Bruce
