NGC 7331
Spiral Galaxy in Pegasus

RA: 22h 37m Dec: +34 24' Mag: 10.3, Size: 130,000(ly), Distance: 47 million(ly)

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  NGC 7331, discovered by William Herschel in 1784, is a Hubble classified spiral-b (SAb) galaxy located in the Pegasus constellation This galaxy is the brightest member of the NGC 7331 Galaxy Group. This galaxy has thick tighly coiled arms and a small neculeus buldge that rotates opposite the main disk. With a mass of approximately 300 billion Suns this makes it larger than our own Milky Way galaxy. The smaller galaxies in the background are approximately 10 times farther away and identified as (L-R) NGC 7337 (SAa, Mag. 15.7), NGC 7335 (Lenticular, Mag.14.5) and NGC 7336 (Spiral, Mag. 15.4). The top left galaxy is NGC 7340 (Compact, Mag 14.9). The smaller galaxy below NGC7331 is MAC2236+3422.

Location & Date Backyard, Abbott Observatory - Sept.20,21,25,26, 2009
Temperature - Low 50's F
Telescope Deep Sky Instruments RC10C , F/7.3 on a Losmandy G11 Gemini, Prime Focus, Image scale 0.82 arcsec/pixel
Camera SBIG ST-2000XM w/CFW8, AO8
Baader LRGB Filters
CCD temp -15C
Exposure Times (L) 34 x 10, (R) 18x10, (G) 13x10,(B) 9x10 Minutes, Bin 1x1
Other Information Image planning - CCD Navigator
Image acquisition/focus/guiding/dither - CCD Autopilot4 w/CCDSoft/TheSky6/PinPoint
Image Processing * CCD Stack- Calibration, Normalize, Alignment, Mean Combine, Deconvolution, Mild DDP
* Adobe CS4 - L+RGB combine, Levels, Curves, Sharpening, Cropping, NR, JPEG conversion

© 2009 Michael A. Siniscalchi