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Instrument |
12.5" RCOS @
~f/9 (2880 mm fl) 0.64 arcsec / pixel. The Zoomify image scale
is 1.28 to 3.07 arcsec / pixel. |
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Mount |
Paramount ME |
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Camera |
SBIG STL-11000 w/ internal filter wheel, AstroDon 6nm Filters |
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Acquisition Data |
8/30/2010 to 10/11/2010 Chino Valley, AZ... with CCDAutoPilot3
& CCDSoft. AOL guided |
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Exposure |
SII 510 min (17
x 30 min, bin 1x1)
Ha 540 min (18 x 30 min, bin 1x1)
OIII 630 min (21 x 30 min, bin 1x1)
Click here for the RGB natural color image.
Click here for the B & W Ha filtered image) |
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Software |
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CCDSoft, CCDStack,
Photoshop CS w/ the Fits Liberator plugin, Noel Carboni's actions.
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PixFix32 (pre-beta) to
repair column defects & pixels.
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CCDStack to calibrate,
register, normalize, data reject and combining the sub exposures.
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PhotoShop for
non-linear stretching,
RGB combine.
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Comment |
North is to the left.
The emission nebula, Sh2-86, and the open star cluster, NGC 6823,
are located in the constellation Vulpecula, at a distance of about
6000 light-years. The Sh2-86 nebula surrounds and is illuminated by
the cluster. The remarkable pillar like features, below and left of
NGC 6823, are probably formed by radiation from the brightest nearby
cluster stars. The shape of the dark elongated nebula
structures noticeably point back to the star cluster.
This false color image
was acquired with SII, Ha and OIII filters mapped to the RGB
channels respectively. Red indicates the presence sulfur,
green hydrogen and blue oxygen. With no color manipulation, the
image would be basically green, due to the dominance of hydrogen.
The image was further processed to produce the orange and blue
colors, made popular by the Hubble Imaging Team.
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