RA: 22h 37m Dec: +34º 24' Mag: 10.3, Size: 130,000(ly), Distance: 47 million(ly)
RA: 22h 37m Dec: +34º 24' Mag: 10.3, Size: 130,000(ly), Distance: 47 million(ly)
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 -15°C |
| 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 |
