Talk:Circumhorizontal arc

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[edit] Latitudes of visibility

The article states

" It occurs only when the sun is high in the sky, at least 58° above the horizon, and can only occur in the presences of cirrus clouds. It can thus not be observed at locations north of 55°N or south of 55°S, except occasionally at higher latitudes from mountains."

Since in summer the suns elevation is increased by 23.4° , the tilt of the Earths axis, it should be visible as far north/south as latitude 78°. Am I missing something? Lumos3 (talk) 16:08, 10 June 2008 (UTC)