Courtesy: Utah Public Art Program
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Sun Dagger

Heber City, Utah

Robert Perless (http://www.arts.utah.gov)

Utah Valley State Collge Wasatch Campus, 3111 N. College Way, Heber City, Utah, 84032
Owner:  State of Utah Public Art Program
Date:  2004
Placement:  universities and colleges
Artwork Type:  public sculpture
Material:  bronze (metal), polymers
Description:  Sun Dagger is meant to function as a unique kind of celestial observatory, amplifying the union and synergy of man and nature. This sculpture is used to tell solar time and will link viewers into the celestial mechanics of the rotation of the Earth around the Sun. It works both as a noon transit and regular sundial, and as a seasonal calendar, celebrating the winter and summer solstices and the vernal and autumnal equinoxes. The gnomon of the sundial faces True North and is elevated at an angle of 40.46, the exact degree of latitude of Heber City. At precisely solar noon, when the sun crosses the meridian, the ray of sunlight coming through the slit will illuminate the 12 o’clock position. Since the sun has a diameter of roughly 1/2 a degree, the transit lasts several minutes. The prisms on the end of the gnomon will project rainbows from the prism array onto the sunline, crossing it, making the sculpture a seasonal calendar as well as a way to tell time.
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