Long tail sundog and contrail over the Alps
The image below shows an intense sundog captured over the Alps on 29 September 2010, at 5.47 p.m. (local time). The sundog, showing a long tail, held this shape for over 20 minutes before finally fading as the Sun was approaching its setting. Sundogs or parhelia are found on either side of the Sun at a distance of 22 degrees from the Sun and result from refraction in hexagonal ice crystals (aligned horizontally) of cirrus type clouds. Note that the reddish color always faces the Sun.
Technical details: Panasonic Lumix DMC-FX35 digital camera; Exp: 1/1000 sec; F/8; ISO 200; Focal lenght: 6.8mm
A close up view image is presented below where are also visible a contrail and the silhouette of the Sacra di San Michele (Saint Michael’s Abbey), see inset in the center-below, that is acknowledged as the monument symbol of Piedmont. Other inset, bottom right, shows the brightness and position of the sundog relative to the Sun.
Technical details: Panasonic Lumix DMC-FX35 digital camera; Exp: 1/1000 sec; F/8; ISO 200; Focal lenght: 17.6mm