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 NGC891 Edge-On Spiral Galaxy 




About:
This beautiful cosmic portrait features NGC 891. The spiral galaxy spans about 100 thousand light-years and is seen almost exactly edge-on from our perspective. In fact, about 30 million light-years distant in the constellation Andromeda, NGC 891 looks a lot like our Milky Way. At first glance, it has a flat, thin, galactic disk and a central bulge cut along the middle by regions of dark obscuring dust. Also apparent in NGC 891's edge-on presentation are filaments of dust that extend hundreds of light-years above and below the center line. The dust has likely been blown out of the disk by supernova explosions or intense star formation activity. Faint neighboring galaxies can also been seen near this galaxy's disk. [Text from APOD]

Optics: GSO RC 10" F8 2000mm - Astrograph Ritchie-Chrétien
Mount: AP Mach1 GTO on Gemini Q-Lock tripod
Camera: ATIK 4000LE with SX USB Filter Wheel
Filters: Baader LRGB 2"
Guiding Systems: SXV-AO-LF Active Optics - SX Lodestar
Dates/Times: 25/26/27/28 Dicembre 2011
Location: Pragelato - Turin - Italy
Exposure Details: L:R:G:B => 480:110:110:100 = > (32x15):(11x10):(11x10):(10x10) Color Bin2 [num x minutes]
Cooling Details: -20 °C
Acquisition: Maxim DL/CCD, Perseus
Processing: CCDStack2, PixInsight, PS CS2
Mean FWHM: 1.88" / 2.56 "
SQM-L: 21.02 / 21.22