![]() Equipment control with PrimaLuce Labs Eagle 3 Pro computer. ![]() Focus with Optec DirectSync motor and controller. Click the image to see it full size.Īcquisition, focusing, guiding and control of Paramount MX mount with TheSkyX. Some of the many other galaxies in the field are marked on the annotated image, including several in a swarm above the left end of NGC 4236. NGC 4236 is part of the M81 group (I have imaged M81 and M82) and lies about 12 million light years away. This image shows more than 34 hours of light collected through two telescopes and cameras running simultaneously, as described below. This makes it quite a difficult object to image. It is large (its length is more than 2/3 the Moon’s width) but has a very low surface brightness, meaning it is barely brighter than the background glow of the sky (mean surface brightness is 24.3 mag/asec 2 outer arms are much fainter). NGC 4236 is a barred spiral galaxy in Draco, the Dragon. IP4AP Tutorial Review, Astronomy Technology Today, July 2015.Image Processing – Sky & Telescope, August 2016.Deconvolution – Sky & Telescope, July 2017.Removing Halos from Bright Stars – August 2017.Imaging in Bright Skies – Sky & Telescope Nov 2017.Lost in the Glare – Sky & Telescope, Oct 2018.The Quest for Round Stars – Sky & Telescope, June 2019.Image Calibraton – Sky & Telescope, Nov 2019.Treasures of the Sharpless Catalogue – Sky & Telescope, June 2020.Double Vision – Sky & Telescope, Oct 2020. ![]()
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