NGC 147/DDO3/Caldwell 17

NGC 147 is a dwarf spheroidal galaxy in the constellation Cassiopeia at about 2.58 million light-years away. NGC 147 is part of our local group of galaxies, and is another satellite galaxy to M31 (like the two close galaxies M32, and M110 which can usually be seen in shots of Andromeda). This galaxy is close-by to NGC 185, a dwarf spheroidal galaxy. It was discovered by John Herschel in 1829 during the month of September, and he noticed that NGC 147 was fainter and slightly larger than its neighbor, NGC 185.

Location of NGC 147 in Cassiopeia

Location of NGC 147 in Cassiopeia

Through the eyepiece in my light polluted yard I was unable to see this 10.4 magnitude galaxy either due to its size, or brightness, or due to the light pollution washing out the dimmer deep space objects.

NGC 147/DDO3/Caldwell 17 taken September 26/27, 2014

NGC 147 taken on the night of September 26, 2014 into the morning of the 27th. This image consists of 18 images at 300 seconds each, 32 dark frames, and 32 flat frames.

Omni XLT 150
CG-5 Advanced Series Go-to
PHD Autoguiding
Orion Starshoot Autoguider
Modified Canon 350D

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