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Click the image for a larger,
~ 50% size,
view. (3000 x 2250 - 1.71 MB)
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Instrument |
Takahashi FSQ-106ED @
f/5.0 (530 mm F.L.) Captured at 2.1 arcsec/pixel. Shown at 4.28
and 17.10 arcsec/pixel. |
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Mount |
Paramount MyT |
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Camera |
SBIG STF-8300M Self
Guiding Package w/ mono ST-i, using AstroDon E-Series LRGB filters. |
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Acquisition Data |
5/20/2017 to 6/27/2017
Chino Valley, AZ w/ CCD Commander, TheSkyXpro and CCDSoft |
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Exposure |
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This is a four
panel mosaic.
The exposures are
duplicated for each panel. |
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Lum |
120 min. (12 x
10 min.) Binned 1x1 |
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RGB |
240 min. (
8
x 10 min. each) " |
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Software |
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PixInsight &
PhotoShop
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eXcalibrator v5.1 for
(g:r)
color balancing, using 564 stars from the APASS database.
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PixInsight
processing includes calibration, registering, stacking, LRGB
creation, mosaic creation, gradient removal with
DynamicBackgroundExtraction and non-linear stretching
with HistogramTransformation.
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Noiseware 5, a
PhotoShop plug-in.
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PhotoShop processing includes
background noise reduction and dimming the stars.
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Comment |
North is to the
bottom. Up-side-down it looks like a horse.
IC 4592 (also known as
the Blue Horsehead Nebula) is a reflection nebula in the
constellation Scorpius at a distance of about 400 light-years.
The nebula is illuminated by the bright star, Nu Scorpii. |
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