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OP-HA-03  << previous picture back to the gallery next picture >> 
upper tangent arc
A closer view of the upper tangent arc that appeared on August 26, 2004. Like the 22° halo and the sun dogs, tangent arcs are often coloured yellow-red on the sunward side and fainter and more white-blue away from the Sun.

[© Wim VAN UTRECHT/CAELESTIA]