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Austin, Texas, US
05:00 am
William Optics RedCat 250/51mm telescope, Optolong L-eNhance dual Ha and Oiii narrow band filter, ZWO ASI 533MC color camera cooled to -10C. ZWO ASIAIR astrophotography controller. Sky-Watcher AZ EQ5 Pro mount. 60 minutes of total exposure in 3' light exposures with bias, dark, and flat calibration frames.
Image calibration, stacking, linear noise reduction, photometric color calibration, and curve stretching in PixInsight. Additional noise reduction in Topaz DeNoise, Final crop and exposure in PhotoShop.
A dual narrow band Ha and Oiii filter captures Nova Cassiopeiae in a beautiful area of the sky with the Bubble Nebula and M52 open cluster. This image was made in Austin, Texas, under a Bortle 7 city light dome with a 2" telescope and one shot color camera. The HOO palate and careful calibration gives this narrow band image a natural appearance.
Nova Cassiopeiae 2021 is the reddish star in the center top, directly above the Bubble Nebula and to the left of the M52 open cluster.
