Circumpolar Motion

   Last night, June 3rd, I sat outside for a while just enjoying dark cities from within the city limits of Tucson. My primary view from my brother’s backyard is toward the north and the mountains in that direction so it is sort of logical, I guess, to take pictures of the night sky like this one showing circumpolar motion.
   The animated graphic is made from a series of 24 exposures all taken over a 15 minute time span and all using the same camera settings: 6 sec.; f4.5; ISO 1600; 20mm focal length. The result is this picture that is a combination of the 24 exposures stacked together using the Freeware program StarTrails.


Caution: Objects viewed with an optical aid are further than they appear.
Click here to go to the Qué tal in the Current Skies web site for more observing information for this month.

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