NGC 7640

Spiral Galaxy in the Constellation Andromeda

NGC 7640 is a barred spiral galaxy.  It lies at a distance of 19 million light-years from Earth.  NGC 7640 has a diameter of approximately 59,000 light-years.

Image Details:

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  • Instrument:  TMB 152 Triplet APO Refractor @ f/7.9 (1200mm) focal length
  • Mount:  Astro-Physics AP-1200GTO
  • Image Scale:  1.6 arc-seconds/pixel
  • Camera: SBIG ST-2000XM with CFW8 Color Filter Wheel and AO-8 Adaptive Optics
  • Filters & Exposure Times:  
    • L:   32 x 5 minutes binned 1 x 1
    • R:  32 x 5 minutes binned 2 x 2
      G:  16 x 5 minutes binned 2 x 2
      B:  16 x 5 minutes binned 2 x 2 
  • For a total equivalent exposure time of 13 hours, 20 minutes
  • Software: Maxim DL/CCD, Adobe Photoshop CS2, RC Astro Gradient X-Terminator, Neat Image Pro
  • Location: C.A.A.S. East Observatory, Little Rock, AR., El. 650ft
  • Date: December 15th, 2008