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William Optics ZenithStar 61 APO, Altair Astro Hypercam 183C PRO, Sky-Watcher EQ5, ZWO 30mm mini guider, ZWO ASI120MM guide camera, RGB&Narrowband filters
The California nebula is a molecular cloud of ionized hydrogen in the constellation of Perseus. The ionized electrons are stripped away from the stellar wind of nearby stars giving the reddish glow of the nebula. Most likely the star that is responsible for the ionization of the gas is the blue giant Xi Persei just to the right of the nebula.