A Winter Analemma for Colorado

February 21, 2004


Provided by: Wojtek Rychlik, Pikes Peak Photo
Summary authors & editors: Wojtek Rychlik

This analemma represents the motion of the Sun over Colorado during the course of two months -- December and January. It was assembled from a series of photographs taken from Colorado Springs, Colorado at 14:28 Mountain Standard Time (2:28 p.m.) during the period from December 2, 2003 through February 1, 2004. Marked days between December 2 and February 1 include the lowest Sun position (December 13), the shortest day (December 22), the largest Sun -- Earth at perigee (January 4). There are some minor errors in alignment, likely due to lens distortion. See also the Earth Science Picture of the Day for January 23, 2004.

Photo details: Canon EF camera, 70-200 mm 1:2.8 L IS USM zoom lens set on 200mm. The lens was partially covered with a Sun filter (a very thin foil not giving any displacements). The forest in the foreground and the Sun were composited onto a single frame.

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