NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Frank Reed
Date: 2026 Jun 15, 13:18 -0700
"Could you remind the address of your Lunar Reduction Calculator?"
Sure. The safe way to get there (safe against changes in links) is to visit my primary navigation workshop website https://ReedNavigation.com. Open the "Apps & Tools" menu. Then select "Analyze Lunars Online".
Note that the lunars tool on my website is not designed for occultations so the time you get from it will not be exact, but close enough for "binocular" observation of the event. Use the screen cap of the app in operation below as a guideline to get it going. Set the body to "Venus" (add planets to the list of stars first) and the observed distance to 0° 00', The fiddle with the UT until the "error" in the lunar is zero. Don't forget that there are two times that will work: one for immersion, when Venus is first hidden by the Moon, and the other for emersion when Venus emerges from behind the Moon. Note that the example below is set for Hampton Road (Norfolk Virginia), and at the time of the immersion the azimuth of the Moon is 180° which is convenient. Set for your own latitude and longitude, of course.
Frank Reed
