Comet 118P Shoemaker-Levy and Barred Galaxy NGC 4643

Mike Olason
Location of photo
Denver Colorado
Date/Time of photo
02 March 2017, 0916 UT
11" SC Telescope and STF-8300M CCD Camera
Magnitude 18 Comet 118P Shoemaker-Levy passing magnitude 12 Barred Galaxy NGC 4643. NGC 4643 looks like Saturn and it's rings when the contrast/brightness are adjusted as shown in the inset. The other inset attempts to show the faint comet better by stacking 3 images.
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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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