Asteroid Florence (3122) the Day before It’s Close Approach to Earth

Mike Olason
Location of photo
Denver Colorado
Date/Time of photo
31 August 2017, 0836UT
1" Refractor f/4 and ST-402ME CCD Camera
Asteroid Florence (3122) is only one day away from it's close approach to Earth at about 3AM MDT on 1 September in these images. The asteroid is magnitude 8.7 and only 4.5 million miles from Earth in these images. The asteroid is about 2.7 miles wide and moving about 1/3 degree per hour across our night skies.
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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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