Anthelion and Anthelic Arcs

April 26, 2006


Provided and copyright by: Alexander Wünsche, AKM e.V.
Summary authors & editors: Alexander Wünsche; Jim Foster

The photo above shows the rarely photographed and seldom observed anthelion and anthelic arcs -- taken from Görlitz, Germany on February 25, 2006. The anthelion or counter-sun is a somewhat spherical patch of light about 1-2 degrees across. It's found at the anthelion point, which is the spot on the opposite horizon from the Sun having the same altitude of the Sun. If you look closely, you can detect two faint arcs above the patch (anthelic arc) that appear to converge upon it. Sightings of the anthelion are typically at the intersection of anthelic arcs, and though a number of possible crystals shapes and orientations can evidently form these colorless spots, they're among the least frequently seen of all the halo phenomena.

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