Astronomy time lapse at Morgan Arboretum, Ste-Anne-de-Bellevue.

This timelapse was done on Saturday, June 13, 2015, at sunset between 20h27 and 22h53. The event was an observing session organized by the Montreal Centre of the Royal Astronomical Society of Canada. The location is the Bellevue Observatory in Morgan Arboretum, Sainte-Anne-de-Bellevue, West of Montreal. The view is towards the West horizon. The camera is an old Canon EOS xti at 8 megapixels, with a Sigma fisheye 10-20mm lense opened at 10mm. The exposure time is automatic and the ISO is set to 800. The first pictures have an exposure of 1/200 sec. and the last ones have an exposure of 10 sec. There are 273 pictures in 146 minutes. The duration is 27 seconds. There are 10 pictures per second. The acceleration factor is 326. The first two bright "stars" at center right are Venus (rightmost) and Jupiter. The sky was promissing at sunset, but unfortunately, the cloud cover increased until we gave up astronomical observations. The good thing about clouds is that they make nice time lapses !-)