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Comet Catalina Near Arcturus (Jan 1, 2016).jpg

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Comet Catalina (C/2013 US10) near Arcturus in the constellation of Bootes, at pre-dawn on the morning of January 1, 2016, with the Last Quarter Moon nearby illluminating the sky. A long, faint ion tail is visible extending 2 to 3 degrees to the right while a brighter but stubby dust tail extends down to the south.

Shot from home using the 200mm Canon telephoto and 1.4x extender at f/4.5 for a stack of 8 x 2-minute exposures at ISO 800 with the Canon 6D. Median combined stacked to eliminate satellite trails. The comet is slightly blurred due to its own motion in that time.
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© 2016 Alan Dyer
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Comet Catalina (C/2013 US10) near Arcturus in the constellation of Bootes, at pre-dawn on the morning of January 1, 2016, with the Last Quarter Moon nearby illluminating the sky. A long, faint ion tail is visible extending 2 to 3 degrees to the right while a brighter but stubby dust tail extends down to the south. <br /> <br /> Shot from home using the 200mm Canon telephoto and 1.4x extender at f/4.5 for a stack of 8 x 2-minute exposures at ISO 800 with the Canon 6D. Median combined stacked to eliminate satellite trails. The comet is slightly blurred due to its own motion in that time.