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Click the image for a larger view.
(1239 x 1652) 1.11 MB
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Instrument |
Takahashi FSQ-106ED @
f/5.0 (530 mm F.L.) Captured at 2.1 arcsec/pixel. Shown at 4.2
and 10.84 arcsec/pixel. |
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Mount |
Losmandy G11 with Gemini L4 v1.0 |
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Camera |
SBIG STF-8300M Self
Guiding Package w/ mono ST-i, using AstroDon filters. |
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Acquisition Data |
1/17/2014
to 4/3/2014 Chino Valley, AZ... with CCDAutoPilot5, CCD Commander & CCDSoft. |
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Exposure |
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SII |
585 min. (39 x
15 min. each bin 1x1) |
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Ha
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540 min. (36 x 15 min. each bin 1x1)
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OIII
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810 min. (54 x 15 min. each bin 1x1)
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Software & Processing Notes |
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CCDSoft, CCDStack,
Photoshop CS6 and PixInsight.
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CCDStack to
calibrate, register, normalize, data reject, combine the sub
exposures.
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PixInsight the initial non-linear stretching.
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PhotoShop for the
RGB combine & final touch-up.
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Noiseware 5, a
PhotoShop plug-in.
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Comment |
North is to the top.
IC 443, the Jellyfish
Nebula, is a Galactic supernova remnant, in the constellation
Gemini, that occurred 8,000 years ago. It is one of the best studied
cases of supernova remnants, interacting with surrounding molecular
clouds. IC 443 spans about 65 light-years at an estimated distance
of 5,000 light-years.
The large expanse, going
out the top-left of the image, is the emission nebula Sh2-249... at
a distance of 5200 light years.
At the center of the upper left quadrant, just to the right of
three bright stars, is the emission and/or reflection nebula IC 444. |
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