Sundials - World's Oldest Clocks

North American Sundial Society

Sacramento Peak  

Sundial 317
State/Province:  New Mexico Country:  USA
Dial Type:  Armillary Sphere Condition:  Excellent
Latitude:   32° 48' N Longitude:   105° 49' W
Location:
  • Outside the Sunspot Visitor Center and Museum at the National Solar
    Observatory/Sacramento Peak in the Lincoln National Forest (South-East of Alamogordo).
 
Description:
  • The bronze armillary sphere is 5-foot in diameter. The dial reads time and date from a rod gnomon cast onto an engraved, equatorial band. The dial shows date bands and solar time corrected for longitude (3 min 17s west of the 105 degree meridian). The dial is accurate to about one minute. At the noon hour line is an analemma showing the correction to mean time. The armillary sphere was designed and built by observatory staff members Dr. Don Neidig, Scott Gregory, and Mitchell Davis.
 
General Information:
  • Owner: National Solar Observatory
  • Designer: Dr. Don Neidig, Scott Gregory, and Mitchell Davis
  • Builder: Dr. Don Neidig, Scott Gregory, and Mitchell Davis
  • Construction Date: Installed 1998.