Addison  

 Sundial: 1089
State/Province:  Texas Country:  USA
Dial Type:  Sun Alignment Condition:  Excellent
  Latitude and Longitude: 32° 56.910’ N  96° 49.512 W
Location:
  • 5016-5048 Quorum Dr.
    Dallas TX 75254

    At the southern end of Quorum Dr in a green plaza surrounded by office buildings
 
Description:
  • This is a sun alignment arch about 23 feet (7m) high and 650 feet (20m) in length and 5 foot (1.5m) wide, It is made of Corten steel, a metal whose surface oxidizes quickly, leaving a rusty chocolate color that provides a textured surface. The archAt the top of the arch are keystone wedges that funnel sunlight on the equinox at local solar noon onto a steel sphere on the ground below. The original model for the arch was made in bronze in 1974 and titled “Rainbow arch restructured”.
 
General Information:Inscription:
  • Owner: DAON Corporation, Quorum Development
  • Plaque:
    SUN – UP – AT – QUORUM
    A SOLAR EQUINOX MARKER NEAR MIDDAY ON MARCH 21 AND SEPTEMBER 21, WHEN DAYS AND NIGHTS ARE OF EQUAL DURATION, THE SUN’S RAYS PASS THROUGH THE APERTURE IN THE SCULPTURE AND STRIKE THE SPHERE ON THE GROUND BELOW. THE SUN’S ANGLE AT THESE TIMES IS 57° 2’ 49”... [AND] DUE TO THE UNEVEN ELLIPTICAL COURSE THE EARTH FOLLOWS AROUND THE SUN, AS WELL AS THE INCLINATION OF THE EARTH’S AXIS AT 23.5°, THE SUN IS 7 MINUTES “LATE” ON THE SPRING EQUINOX AND 7 MINUTES “EARLY” ON THE AUTUMN EQUINOX. FURTHERMORE, 27 MINUTES MUST ALWAYS BE ADDED TO CLOCK TIME BECAUSE THIS SITE, LOCATED AT 96° 49’ 12” WEST LONGITUDE, IS 27 MINUTES WEST OF THE CENTRAL TIME ZONE MERIDIAN AT 90° WEST.... J.V. HOUSE, SCULPTOR
  • Designer: John V. House, Sculptor
  • Builder: Baldwin Metals, Dallas Texas
  • Construction Date: 1981
 

Last Revised: 2023-05-18 16:49