NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Alexandre Eremenko
Date: 2013 Jan 20, 19:30 -0800
Frank,
your message touches several interesting questions.
> The angular distance from Jupiter to the near limb of the Moon will be less than > a degree for most observers in the Americas. The exact value depends on your
> location.
Near limb will be the dark one.
It never crossed my mind to observe a lunar distance from a DARK limb.
I don't think it is possible in the usual conditions when the dark part is
not visible.
> It's still an excellent test of your sextant and your skill in using it.
Why is this a more "exellent test" than any other Lunar?
(I understand this could be a test for my conjecture about something wrong
happening with my sextant first two teeth. But in general, what is so
excellent about this particular configuration?)
> In fact, by observing this distance, you can determine your latitude
Do you mean by the horizontal parallax?
How else can the latitude affect a lunar
distance?
> and there are other problems connected with small angle lunars
What are they? I understand that the distance changes very slowly because
they have different declination. But what else is bad about close lunars?
Suppose the declination happens to be the same.
Alex.
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