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5
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Click the image for ~ 70% size
view. (2400 x
1600 - 1.16 MB)
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Instrument |
12.5" RCOS @
~ f/9 (2880 mm fl) at 0.64 arcsec/pixel. Shown at 0.92 & 2.81 arcsec/pixel. |
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Mount |
Paramount ME |
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Camera |
SBIG STL-11000 w/
FW8 filter wheel & AstroDon Gen-2 RGB filters. |
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Acquisition Data |
2/16/2016 to 2/25/2016 Chino Valley, AZ. with CCD Commander & CCDSoft. AOL
guided |
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Exposure |
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RGB |
585 min (13 x
15 min. each) Bin 1x1 |
eXcalibrator RGB
ratios are 1.00, 0.71 & 0.73 |
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Software & Processing Notes
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CCDSoft, CCDStack,
PixInsight, Photoshop CS6.
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eXcalibrator
v6.2 for (g:r),(b:r) color balancing, using
808 stars from the Pan-STARRS database.
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CCDBand-Aid to repair
KAI-11000M vertical bars.
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CCDStack to
calibrate the all sub exposures.
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PixInsight to
register, data reject, mean combine, create the RGB
image,
gradient removal, non-linear stretching with HistogramTransformation.
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PhotoShop for
additional background neutralization, background smoothing and
green cast removal with
HLVG.
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Noiseware 5, a PhotoShop plug-in.
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Comment
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Shown rotated 150°
counter-clockwise.
Messier 36 or M36,
also known as NGC 1960, is an open star cluster in the Auriga
constellation at a distance of about 4,300 light years. The cluster
includes ten stars with a visual magnitude brighter than 10 and 178
down to magnitude 14. At about 25 million years, M36 is very young.
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