OBSERVATORY NORTH PARK FULL
T elescope: P laneWave 12.5” CDK f/8 Closed Carbon Fiber Tube Corrected Dall-Kirkham Astrograph with Quartz Mirrors 0.66 Reducer for f/5.3 large FOV M ount: A stro-Physics AP1100 GTO CP4 Equatorial mount G uide S cope: A stro - 400mm Guider Refractor G uide C amera: A SI 290mm Guider Camera M ain c amera: A TIK 16200 Hi-Res Monochrome 16Mp full frame diagonal of 35mm - ATIK 7 Position Filter Wheel with LRGB, & Narrowband 3.5nm HA, SII, OIII F ocuser: H edrick 2.75” large format Hi-Res auto focuser P lanetary camera: C elestron Skyris 236C color CMOS camera V oyager A strophotography s oftware - provides automation and complete control of the observatory & telescope. There are many other galaxies in this image but I have been unable to find any charts or descriptions that have them identified!! The annotation in the image (ULX) indicates the position of an ultra-luminous X-ray source, possibly indicating the presence of an intermediate-mass black hole. Multiple other galaxies can be seen in this image from mag 11.5 to magnitude 18.5 and beyond!! NGC 3184 - Magnitude 11.49 and 39.9 Million LY from earth NGC 3179 - Magnitude 13.74 and 326 Million LY from earth 2MASX J10184824 - Magnitude 18.04 and 722 Million LY from earth 2MASX J10184307 - Magnitude 16.31 and 1.09 Billion LY from earth SDSS J101758.02 - Magnitude 18.38 and 1.20 Billion LY frm earth LEDA 2181848 - Magnitude 15.91 and 1.26 Billion LY from earth 2MASX J10190325 - Magnitude 15.97 and 1.25 Billion LY from earth LEDA 2186561 - Magnitude 16.42 and 1.26 Billion LY from earth 2MAX J10183326 - Magnitude 18.49 and 1.27 Billion LY from earth 2XMM J101821.2 - Magnitude 17.89 and 1.91 Billion LY from earth VV96 J101732.7 - Magnitude 18.23 and 6.20 Billion LY from earth HIP 50189 STAR - Magnitude 9.39 and just 32.6 LY from earth.
I imaged this for 9 hrs Luminance and 1.5 hrs for each of RGB over 2 evenings. The bright stars that highlight the arms were created in huge density waves that circle the center. The blue color of its spiral arms comes mostly from relatively few bright young blue stars. NGC3184 is a spiral galaxy approximately 40 million light-years away in the constellation Ursa Major and at a magnitude of 11.49.
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