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Solstice Azimuth (Solar and Lunar Standstills)

 

The applet is calculating the azimuth angle of the sun for sunrise and sunset at summer solstice and winter solstice, using the formula:

cos(az) = sin(eps)/cos(latitude )

The value of the obliquity of the ecliptic for 2000, Jan 1 at 12 UT (Julian Day 2451545.0) is:

ε = 23.43929 = 23 26' 21.448''

Obliquity Applet

At present, the mean obliquity currently decreases by 0.014 (50.3'') per century.
Near the year 12030 a minimum will be reached (22 36' 41 '').
About the year -7530 there was a maximum inclination (24 14' 07 '').

Applet: Lunar Standstills

 

Last Modified: 2017, Oct 10