NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Moon Meridian Passage
From: UNK
Date: 2013 Sep 22, 22:18 -0700
From: UNK
Date: 2013 Sep 22, 22:18 -0700
Lu,
The terms "upper" and "lower" meridian passage or culmination originally come from transits of circumpolar stars, where the meanings are self explanatory when both transits can be observed. By analogy the meaning can be extended to objects where only one transit occurs above the horizon. Naturally, one would consider the latter the "upper" and the one below the horizon the "lower" transit.
Herbert
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