The NGC7331 Galaxies

Galaxy Group in Pegasus

Uploaded 10/25/03

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This rich field of galaxies is dominated by the bright SA(s)b spiral NGC7331, a 9.4 magnitude object with an inclination of 6 degrees from edge on. Six other field galaxies appear in this images as well as a host of very faint anonymous objects. Below are full sized pieces of the original image with the individual objects shown, the faintest of which are 17th magnitude. You can use the chart I generated below from Megastar 5 to locate them:

CGCG514-66
  MAC2236+3413
  MAC2236+3422
  MAC2237+3415
  MAC2237+3437
  NGC7335
  NGC7336
  NGC7337
  NGC7340
  PGC69291

Instrument:  12.5" f/5 Home made Newtonian
Platform:  Astrophysics 1200 QMD
CCD Camera:  SBIG ST8i NABG with Enhanced Cooling
Guider: SBIG ST4
Exposure:  LRGB = 60:20:20:20 (RGB Binned 2x2)
RGB Combine Ratio:  1: .8: 2.4
Filters:  RGB Tricolor
Location:  Payson, Arizona
Elevation:  5150 ft.
Sky:  Seeing FWHM = 5.5 arcsec (Maxim DL - 10min subframe), Transparency 5/10
Outside Temperature:  15 C
CCD Temperature:  -20 C
Processing Tools:  Maxim DL, Photoshop, AIP4WIN, PW Pro.
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