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Annotation by
Astrometry.net
Click the image for a higher
resolution
view. (1800 x 1200 - 927 KB)
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Instrument |
12.5" RCOS @
~f/9 (2880 mm fl) at 1.28 arcsec/pixel. Shown at 2.06 and 0.87 arcsec/pixel. |
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Mount |
Paramount ME |
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Camera |
SBIG STL-11000 w/
FW8 filter wheel, AstroDon Gen-2 Filters |
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Acquisition Data |
10/22/2014
to 11/26/2014 Chino Valley, AZ... with CCD Commander & CCDSoft,
AOL guided. |
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Exposure |
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Lum |
450 min. (30 x
15 min.
each) Bin 1x1 |
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RGB |
900 min. (20 x 15 min.
each) Bin 2x2 |
eXcalibrator
RGB ratios are 1.00, 0.95 & 1.09 |
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Software & Processing Notes |
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CCDSoft, CCDStack,
PixInsight & Photoshop CS6.
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eXcalibrator
v4.30 for (g:r) color balancing, using 51 stars from the
SDSS-DR9 database.
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CCDBand-Aid to repair
KAI-11000M vertical bars.
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CCDStack to
calibrate all sub exposures and and creating the RGB image.
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PixInsight
processing includes registration, stacking and data rejection
for the luminance, gradient repair and non-linear stretching,
with HistogramTransformation, for both the Lum and RGB images
and creating the LRGB image. Finally, selective use of
HDRMultiscaleTransform, with various layer counts, was used to
enhance the detail of the galaxies.
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PhotoShop for the
final touch up.
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Noiseware 5, a
PhotoShop plug-in.
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Comment |
North is to the top.
This interesting group
of galaxies is located in the constellation Andromeda. The galaxy distances
generally fall in the range of 220 to 260 million light years. |
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