Comet 90P/Gehrels

Photographer
Mike Olason
Email
moicylander@centurylink.net
Location of photo
Denver Colorado
Date/Time of photo
20 September 2017, 1129UT
Equipment
11" SCT f/6.4 and STF-8300M CCD Camera
Description
Comet 90P/Gehrels was at Perihelion on June 19 during it's orbit of 14.95 years. The comet was about magnitude 18 in these images and 260 Million Miles from Earth. The upper right insets show a single 600 second image of the comet.
CATEGORIES
Astronomy Pictures: Sky & Telescope's Online Gallery, Meteor, Comet & Asteroid Pictures
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 "moicylander@centurylink.net".
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