NGC 2175 in SHO with 81mm APO at f/5 (Robert H. Kutner)

Celestial hemisphere: Northern · Constellation: Orion (Ori) · Contains: IC 2159 · LBN 854 · Monkey Head Nebula · NGC 2174 · NGC 2175 · Sh2-252

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NGC 2175 in SHO with 81mm APO at f/5

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NGC 2175 in SHO with 81mm APO at f/5

First clear night in a while and may try to collect more data on this later.

ASIAir pro to acquire ~30 x 300s images @ -10c & 0g for Ha, Sii, & Oiii, ~69% were usable. For RGB, for stars, 10 x 10s images @ -10c & 0g with Chroma RGB filters.

Blink / Subframe Select, Calibrated (40 Dark, 60 Flat, 100 Bias), Star Aligned all images with PixInsight. Used the Normalized Scale Gradient for integration.

For Ha, Sii, & Oiii channels: Cropped, DBE, MMT, TGVDenoise, (& duplicated the Ha here for the Lum), EZ Soft Stretch, StarNet for star removal, and channel combined using PixelMath (ForaxX palette*). The duplicated Ha -> Lum was Maskstretched, HDR, LHT, MMT, EZStar Reduction, and LRGB Combined with the PixelMath SHO image.

RGB filter data combined with Channel Combination, Image was masked with an inverted Star Mask and replaced with SHO image using Pixel Math to add the nebulosity around the stars.

Combined image was Curves modified w/ mask. Moved to Photoshop to further adjust saturation and contrast, touch-up star color, and additional noise reduction. Returned to PI for TGVDenoise, Resample, Crop, and Annotation.

*f is (Ha*Oiii)^~(Ha*Oiii)
R = f*Sii + ~f*Ha
G = f*(.7*Ha + .3*Sii) + ~f*Oiii
B = Oiii

ZWO ASI183/QHY183
Cloudy Nights
William Optics GT Series

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Advanced success
Started	...
Astrometry.net job	5517213
PixInsight job	NO1MP1U7X5RPMCFZF15ML7C02A3G2PNR
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h09m57s.808
RA (top/left)	06h08m28s.411
RA (top/right)	06h08m02s.670
RA (bottom/right)	06h11m26s.658
RA (bottom/left)	06h11m54s.167

Dec (center)	+20°39′42″.41
Dec (top/left)	+21°10′04″.15
Dec (top/right)	+20°14′42″.25
Dec (bottom/right)	+20°09′16″.50
Dec (bottom/left)	+21°04′35″.32

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NGC 2175 in SHO with 81mm APO at f/5

NGC 2175 in SHO with 81mm APO at f/5

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NGC 2175 in SHO with 81mm APO at f/5

NGC 2175 in SHO with 81mm APO at f/5

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