Comets C/2016 N4 Master and P/2016 N1 McNaught (339P) passing in the Night Sky

Mike Olason
Location of photo
Denver Colorado
Date/Time of photo
2016/07/20 1024UT and 2016/07/21 0906UT
11" SC Telescope and STF-8300M CCD Camera
These 2 images were taken on successive nights of new comet 16.9 magnitude C/2016 N4 Master and recovered comet 18.5 magnitude P/2016 N1 McNaught (339P) passing within 0.1 degree of each other in our night sky. The comets are moving in opposite directions. The images were both 2x300 seconds centered on the same star field. Note how much dimmer magnitude 18.5 is compared to magnitude 16.9.
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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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