## A Conversation for Sundials

### how do I calculate the correct hour spacing for a sundial

Researcher 197673 Started conversation Jul 2, 2002

Is there a global sundial ? or do the hour spaces vary depending on your latitude. Is there a formula

### how do I calculate the correct hour spacing for a sundial

Gnomon - time to move on Posted Jul 7, 2002

If the gnomon is parallel to the Earth's axis, then the hour spacing is constant at 15 degrees for each hour. Because the Earth goes around the sun in an ellipse instead of a circle, this is very slightly wrong at certain times of the year but only by a few minutes.

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### how do I calculate the correct hour spacing for a sundial

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