NGC6027 A-E, Seyfert's Sextet, in Serpens (Cauda)

 

(Click on image for full size version)

 

Description: This grouping of six galaxies is extremely small and faint.  See the full size image for a perspective on the size.  The FOV of the full size image is 12 x 18 arc-min.  Even though they are tightly grouped, one of the six has a dramatically different red shift from the other five.  A chance grouping or some other explanation?
  
Exposure Data: 5/27/2003.  LRGB: 18x10m, 4x10m, 4x10m, 4x10m. RGB binned 2x2. 
-10C, 0.49 arc-sec./pixel.
 
Processing: Acquired via Sequencer in Maxim, reduced and aligned in Mira. double size, Sigma Reject combine,  RGB combine in Maxim. Lum 5 iterations in CCDSharp. LLRGB assembled with curves, levels and other adjustments in Photoshop.
 
Optical System: 12.5 Ritchey-Chretien @ F/9, ST-10XME NABG/CFW-8A CCD camera, Paramount ME.  L: AO-7 guided, RGB: autoguided.
 
Comments: A very difficult target under suburban skies.  Estimated sky background is 20.2 mag/arcsec2.