Bubble Nebula and Nova 2021 Cas

Bubble Nebula and Nova 2021 Cas

Nova 2021 Cas is only 10th magnitude, but appears in a beautiful neighborhood with open cluster M52, the Bubble Nebula, and additional reflection and emission nebula. The nova is the reddish star at the top center, directly above the Bubble Nebula and to the left of M52. This image is from a filter with only two narrow bands. One is for the Hydrogen alpha emission line and the other catches the Oxygen iii and Hydrogen beta lines. Together these illuminate red, green and blue pixels in a color camera. The result is an image that cuts through city lights and haze low on the horizon, yet can be balanced for a relatively natural color balance with the HOO palate. William Optics RedCat 51 2502"/51mm telescope, Optolong L-eNhance filter, ZWO ASI533 MC cooled color camera. Re-processed in Pixinsight, RC-Astro Noise/Blur/StarXterminator, and Photoshop.

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Date Taken: 2021-04-11




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