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Directory Root >> Events >> Atmospheric Optics >> Halos >> Tangent arcs

Arc tangent supérieur 13 (567 x 425 - 30 Ko)

©Serge Vasseur [info]

Photo taken on Saturday 09 September 2006 in Anserville (Oise)
[Digital Photo Camera]
CANON Powershot S 50
Exposure : 1/1250s à 8.0
[Without telescope]
seen 792 times
Author 's note :
Heure locale: 12h36
Hauteur du soleil: 46°
Très discret arc tangent supérieur, dont on devine la naissance du halo circonscrit, associé au non moins discret halo à 22° (ce sont les mêmes cristaux qui les génèrent). On remarquera la très brillante traînée d'avion qui traverse le champ, à droite. Alors qui est au-dessus ou au-dessous, l'avion, les cirrus, ou l'arc?

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