Focal Pointe Observatory
Astrophotography by Bob Franke

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UGC 10310 (Arp 2)

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Click the image for a 75% size wide field view. (2916 x 1941 - 1.27 MB)

Instrument

12.5" RCOS @ ~ f/9 (2880 mm fl) at 0.64 arcsec/pixel. Shown at  0.64 and 0.85 arcsec/pixel.

Mount

Paramount ME

Camera

SBIG STL-11000 w/ FW8 filter wheel & AstroDon Gen-2 LRGB filters.

Acquisition Data

7/3/2016 to 7/9/2016 Chino Valley, AZ.  with CCD Commander & CCDSoft.  AOL guided

Exposure

Lum

330 min (11 x 30 min. each) Bin 1x1

RGB

360 min ( 8 x 15 min. each) Bin 2x2

eXcalibrator RGB ratios are 1.00, 1.09 & 1.24

Software & Processing Notes

 

  • CCDSoft, CCDStack, PixInsight, Photoshop CS6.

  • eXcalibrator v6.1 for (g:r),(b:r) color balancing, using 175 stars from the Pan-STARRS database.

  • CCDBand-Aid to repair KAI-11000M vertical bars.

  • CCDStack to calibrate the sub exposures.

  • PixInsight to register, data  reject, mean combine the sub exposures and create the LRGB image. Also for gradient removal, non-linear stretching with HistogramTransformation, color saturation and increased galaxy core detail with HDRMultiscaleTransform.

  • PhotoShop layers for selectivly adding the enhanced galaxy core data, selective sharpening, and background noise reduction. 

  • Noiseware 5, a PhotoShop plug-in.

Comment

 

Shown rotated 70 clock-wise.

UGC 10310 (Arp 2) is an SB dwarf galaxy of the Magellanic class in the constellation of Hercules. The low surface brightness spiral galaxy is at a distance of about 33 million light-years.