NGC 891


Explanation: NGC 891 (also known as Caldwell 23) is an edge-on unbarred spiral galaxy about 30 million light-years away in the constellation Andromeda. It was discovered by William Herschel on October 6, 1784. The galaxy is a member of the NGC 1023 group of galaxies in the Local Supercluster. It has an H II nucleus.The object is visible in small to moderate size telescopes as a faint elongated smear of light with a dust lane visible in larger apertures. Supernova SN 1986J was discovered on August 21, 1986 at apparent magnitude 14.Credit: Wikipedia



Optics: Celestron C11 HD @ f10, f6.3
Mount: Avalon M3 Fast Reverse
Camera: SX H694
Dates/Times: nov 2015, nov 2016
Location: Viterbo, W.Herschel obs. Italy
Exposure: Lum: 600 min  R : 76 min; G: R/B min; B: 116 min
Cooling:  avg – 15°
Acquisition: A.Falesiedi
Processing: A.Falesiedi
SQM-L:  19.2
Um  80%

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