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Instrument |
12.5" RCOS @
~f/9 (2880 mm fl) 0.64 arcsec / pixel. Zoomify image scale is
0.64 to 1.79 arcsec / pixel. |
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Mount |
Paramount ME |
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Camera |
SBIG STL-11000 w/ internal filter wheel, AstroDon Filters |
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Acquisition Data |
5/16/2010 to 6/6/2010
Chino Valley, AZ... with CCDAutoPilot3 & CCDSoft, AOL guided |
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Exposure |
Lum (no filter)
330 min (22 x 15 min, bin 1x1)
RGB
270 min ( 6 x 15 min each, bin 2x2) |
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Software |
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CCDSoft, CCDStack,
Photoshop CS w/ the Fits Liberator plugin. Noel Carboni's actions
and Russell Croman's GradientXTerminator.
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Color calibration by MBG (my best guess), there were no useable
stars for eXcalibrator.
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PixFix32 (pre-beta) to
repair hot/cold pixels and column defects.
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CCDStack to calibrate,
register, normalize, data reject, combine the sub exposures, LRGB
color, and luminance deconvolution.
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PhotoShop for LLRGB
combine &
on-linear stretching.
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Comment |
North is to top.
NGC 5395 and 5394 ,
also known as Arp 84, are two interacting galaxies in the
constellation Canes Venatici. The larger, NGC 5395, is at a distance
165 million light-years and NGC 5394 is 162 million light-years
away. NGC 5394 is thought to have cart wheeled through NGC 5395,
instead of a grazing encounter.
The larger elliptical galaxy, to the upper left of NGC 5394, is IC 4356.
At a distance of about 675 million light-years, IC 4356 is a member
of the Virgo I galaxy group.
Arp 84 is also
known as the Heron Galaxy. It takes little imagination to see a blue
heron's body, complete with neck, head and a beak reaching out to a
nearby fish. Also seen in the image, are more than 1000 background
galaxies... as faint as magnitude 23.2.
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