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|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. It lies at a distance of about 1,000 light years from Earth. Its fluorescence is due to excitation of the Hβ line in the nebula by the nearby prodigiously energetic O7 star, Xi Persei (also known as Menkib, seen at center below it in the inset at right).
The California Nebula was discovered by E. E. Barnard in 1884.
By coincidence, the California Nebula transits in the zenith in central California as the latitude matches the declination of the object.
|SW Quattro 8S 200mm f/4 with Baader MPCC Mark III corrector
|Baader Ha, R, G, B 36mm
|NEQ6 with EQASCOM
|SW 70/500 with AlCCD5
|RA 03:59:00 DEC 36:39:49 J2000
|11,12 December 2020
|Astrobioparco di Felizzano, AL, Italy
|Ha - 20x900 @-10C bin 1x1
RGB - 18x300 bin 2x2 each
Integration time - 9h30m
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