Comet C/2016 N4 Master in the Glow of the Andromeda Galaxy M31

Mike Olason
Location of photo
Denver Colorado
Date/Time of photo
29 June 2017, 1006UT
11" SCT f/6.4 and STF-8300M CCD Camera
Comet C/2016 N4 Master on it's 3rd night crossing the background glow of the Andromeda Galaxy is in the western region of M31 just above the double nucleus at the center of M31. The Andromeda Galaxy is the largest galaxy in our local group with about one trillion stars. In about 4.5 billion years our Milky Way Galaxy and the Andromeda Galaxy are expected to collide and merge. The inset attempts to show the comet a little better.
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Mike Olason

About Mike Olason

I started imaging comets in 1994 with an ST-5 CCD Camera and an 11" SC Telescope. Since then the CCD cameras have changed (ST-7, ST-402ME and STF-8300M), but I am still using the 11" SC Telescope. Naturally I have used a lot of smaller telescopes to obtain larger fields of view. I live south of Denver at an elevation of 6150 feet which allows me to image comets down to about magnitude 20.5 on a clear night. I give permission to anyone who may want to use my images for a project or article, especially school projects. All that I ask is that if you use some of my images that you give me credit for taking the images. I have 1000s of comet images so if you would like more images of the same comet on a different date, other comets or would like to ask a question about one of my comet images send me an email to "".
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