Up Close & inside the California Nebula Complex.
The California Nebula (NGC 1499) is an emission nebula located in the constellation Perseus. It is so named because it appears to resemble the outline of the US State of California on long exposure photographs. It is almost 2.5° long on the sky and, because of its very low surface brightness, it is extremely difficult to observe visually.
The nearby energetic O7 star, xi Persei is responsible for the fluorescence of the nebula, due to excitation of the Hβ line. The California Nebula is also known as Sharpless 220 and is located about 1,000 light years from Earth. The California Nebula was discovered by E. E. Barnard in 1884.
This is my extreme close-up shot of it, literally looking inside near the center section the California Nebula Complex, you can also see the elusive black Jelly Fish, an opaque dark black molecular dust cloud near the bottom. A tremendous amount of details are visible within the California Nebula cloud..
I captured this image from my backyard observatory in Dayton, Ohio over 3 nights 09-17, 09-21, & 09-22 of 2017 of light gathering for a total of 7 hours & 15 minutes of exposure time, using my 6 inch diameter F5, Newtonian Scope & a ZWO 174MM cooled Cmos camera in HA, S2, O3 lines Mapped out to RGB.