Comet 22P Kopff visually passing through the Trifid Nebula M20

Location of photo
Denver, Colorado
Date/Time of photo
0114UT 11/12/2015
6" SCT f/10, SBIG STF-8300M
Comet 22P Kopff visually passing through the Trifid Nebula M20. Imaged shortly after sunset due to low altitude (8 degrees) of the comet in the southwest. 300 second exposure to properly expose the nebula and comet, but not smear the comet due to it's moving at 2 arc minutes per hour.
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Mike Olason

About Icylander2

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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