Two dwarf galaxies in Cassiopeia

Posted by dcrowson
on Sunday, October 18, 2015

NGC 185 (Caldwell 18) on the left is a dwarf spheroidal galaxy around 2 million light-years away. NGC 147 (Caldwell 17) on the right is also a dwarf spheroidal galaxy around 2.6 million light-years away. Both galaxies are located in Cassiopeia, members of the Local Group and companions of M31.

Luminance – 12x600s – 120 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2

240 minutes total exposure – 4 hours

Imaged from Dardenne Prairie, Missouri (a red zone) on October 16th and 17th, 2015 with a SBIG ST-8300M on an Astro-Tech AT90DT at f/6.7 603mm.


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