Comet 174P/Echeclus a week after its Outburst

Mike Olason
Location of photo
Denver, Colorado
Date/Time of photo
15 December 2017, 0623UT
11" SCT f/6.4 and STF-8300M CCD Camera
Comet 174P went into an outburst in early December from Magnitude 18+ to magnitude 13+. The animation is composed of 3 images of 600 seconds, 600 seconds and 900 seconds but the comet is only moving at 7"/hour so there is not much movement. 174P is about magnitude 14.5 in these images taken from 0623-0658UT. The FOV is 13'x10'.
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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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