Analemmatic dials
Sundial home page The analemmatic sundial is also called the variable centre dial. Analemmatic sundials are not common and make use of a movable gnomon. The gnomon is vertical and its position is dependent on the date - therefore the variable centre. The hours are indicated by points that fall on the circumference of an ellipse. If made to a large scale this type of dial can be very interactive and entertaining, since the visitor (instead of a pole) becomes the gnomon.
Detailed instructions for the construction of an annalemmatic sundial for Johannesburg / Pretoria, Gauteng Province, South Africa can be found on the HartRAO web site.
Analemmatic dials are altitude dials.
- Analemmatic dials
- Armillary dials
- Conical or Scaphe dials
- Cylindrical or pole sundials
- Digital sundials
- Equatorial or universal dials
- Horizontal dials
- Jewelry dials
- Moon dials
- Polar dials
- Reflected ceiling dials
- Ring dials
- Vertical dials
