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 about magnitude 20.5. My images are not pretty, they have only been dark subtracted, flat fielded, contrast/brightness adjusted and maybe a median filter to reduce the image noise. This is all done with the camera software CCDOps. The comet images reflect reality, not photographic artistry.
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