The Rosette Nebula

Rosette Nebula

Other names:NGC 2237, Caldwell 49
Distance:5000 light years
Date:25-Feb-2019, 26-Feb-2019, 27-Feb-2019
Telescope:TS Optics 65/420 Imaging Star
Field of view:2° 14' x 1° 15'
Cameras:Canon EOS600D, Canon T3i mono mod
Filters:Baader UV/IR-cut, Baader 7nm Ha
Mount:Skywatcher EQ6-R
Guiding:ZWO OAG, Lacerta MGen-II
Exposure time:5h 22min
OSC 71 x 2min
Ha 12 x 15min
Sizes 1920 x 1080 | 4920 x 3170
OSC was taken with an unmodified Canon 600D. Ha, taken with a mono modded T3i was first added to the red channel. After that the color image was processed as usual. An artificial luminance was extracted from the OSC and blended with the Ha data. This blended luminance was combined with the color image. The seeing was poor, FWHM was in the 4-5 arcsec range. I excluded all subframes with an FWHM higher then 5 arcsecs. After deconvolution and thanks to the size of the object it still is a decent image in my eyes. This object can be imaged with an unmodified DSLR as well. Here is a version using the OSC data only: link