Sun azimuth at Greenwich meridian...

[Externet]

Hi all.

Is the sun position at longitude 00⁰ 00^' 00^" the exact geographic south at 12:00:00N time every and any day of the year ?

 

Does the seasonal earth rotation axis angle alters anything regarding azimuth ?

[Endy0816]

Does this help?

Because of Earth's uneven speed in its elliptical orbit and its axial tilt, noon (12:00:00) GMT is rarely the exact moment the sun crosses the Greenwich meridian and reaches its highest point in the sky there. This event may occur up to 16 minutes before or after noon GMT, a discrepancy calculated by the equation of time. Noon GMT is the annual average (i.e., "mean") moment of this event, which accounts for the word "mean" in "Greenwich Mean Time".

https://en.wikipedia.org/wiki/Greenwich_Mean_Time