Comet C/2016 N4 Master passing M31 Star Cloud NGC 206

Mike Olason
Location of photo
Denver Colorado
Date/Time of photo
28 June 2017, 0948UT
11" SCT f/6.4 and STF-8300M
Comet C/2016 N4 Master is moving across the background glow of M31. NGC 206, the brightest star cloud in M31 as seen from Earth, has over 300 massive bright stars in one of the largest star forming regions in our local group of galaxies. NGC 206 is 4000 light years across. Other star clouds in M31 are seen to the right of NGC 206 in this image. The brighter stars in front of NGC 206 are stars in our Milky Way Galaxy.
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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 almost magnitude 21 on a perfect night. Unfortunately ChemTrails have turned Denver cloudy and dry. I use the camera software CCDOps to process my images. All I do to each image is dark subtraction and flat field, stack images as required to show faint comets, contrast/bright adjust the final image and maybe use a median filter to reduce the image noise. The result is an image that reflects reality and will never win any picture of the day award. If you would like to use my images for a project or ask a question send me an email to "".
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