Comet 73P Schwassmann-Wachmann and Fragment 73P-BT in the Dawn Sky

Mike Olason
Location of photo
Denver Colorado
Date/Time of photo
2017/02/27 1235UT
11" SC Telescope and STF-8300M CCD Camera
Comet 73P and its Fragment 73P-BT are now the same magnitude 14.0, after shedding fragment BT a couple weeks ago the fragment had been a magnitude brighter than its mother. The insets show a single 60 second image. The images were taken in the early dawn sky.
Meteor, Comet & Asteroid Pictures, Online Gallery
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.
All comments must follow the Sky & Telescope Terms of Use and will be moderated prior to posting. Please be civil in your comments. Sky & Telescope reserves the right to use the comments we receive, in whole or in part, and to use the commenter’s username, in any medium. See also the Terms of Use and Privacy Policy.