The Analemmic Sundial Gnomon
This analemmic gnomon is a flat plate with a Figure-8 pattern cut out of the center. The gnomon plate is suspended in the exact center of the Equatorial Dial Ring and can swivel about the North Celestial Pole axis of the sundial. A solar azimuth of 180° and altitude of 0° corresponds with the exact center of the gnomon plate.
The analemma shape and date marks were calculated by the following method.