NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Bill Ritchie
Date: 2025 Apr 4, 15:08 -0700
Frank, You say "There are a wide variety of sources that do this right, and then there are some sources that just bumble around."
Astron also includes a Lunar Distance Table for the selected UT day. Attached is a screen shot, together one from your excellent app, both for 5th April 2025 UT as visible from NYSE.
Astron data differs from your tables by 0.1' on up to 20% of samples. This is because I use lesser data sources than NASA/JPL so that the software will work offline. I find it interesting to compare the body/hour combinations where you quote a value and I do not, or vice versa. It all depends on cut off values, such as minimum Moon/Body altitude, proximity of Venus to Sun, etc. which are, to a great extent, subjective. The user notes give a method of listing the reasons for inclusion or rejection of any body /hour combination.
Do you regard this a 'bumbling around'?
