Curt Renz Capital Resources


Full Moons
Panorama illustrating the geocentric declination, distance, angular diameter and brightness of 15 Full Moons

Lunar Libration
Graph of the monthly apparent swings of the lunar surface in both longitude and latitude

Lunar & Solar Eclipses
Preview graphics with data for upcoming eclipses with high Solex numerical intergration accuracy & precise elliptical shadow of Earth



Lunar Terminator on Rayed Craters & Lunar X
Table of sunrises and sunsets on craters as the lunar terminator sweeps across them during the current lunar month

Lunar Occultations of Planets & Stars
Graze maps, preview graphics and Besselian elements for upcoming occultations of bright planets & stars by the Moon

New Moon Spotting - 2023 DEC 13
View of the western sky from Chicagoland, with the young crescent Moon at 20 minutes after sunset

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Orion WiFi Enabled Telescopes
It’s a challenge every month to spot the New Moon after sunset by naked eye (or eyeglasses) as early as possible. I use the term New Moon in its classical sense of one’s first sighting of the Moon after its monthly solar conjunction (Dark Moon).

   The Dark Moon (which some call New Moon) will reach a geocentric minimum illuminated fraction of its apparent disk on 2023 DEC 12 at 23:07 UT (17:07 CST).

  Even sharp eyed observers may find it impossible to spot the one-day-old Moon after sunset on December 13. This due to both the time of year and the point in the nodal cycle. Luck should improve the following evening. See my New Moon Spotting chart above.