Sh2-112 HaSHO (Rodd Dryfoos)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: LBN 337 · Sh2-112

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Sh2-112 HaSHO

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Sh2-112 HaSHO

This was a very challenging project. The region is loaded with dust and faint Ha emissions. But even with 13 hours of Ha, the background emissions were still noisy and rough. Seeing was good for the OIII and SII, but poor for the Ha. The imge is soft for this reason. My goal was to stretch the data commendurately with its quality--not over doing it, trying to keep the image as natural looking as possible. I believe that the RGBish stars are a result of the light processing. Normally, I do not leave colored stars in narrowband images, but these look quite nice, with no unatural looking colors. I am debating reshooting the Ha during good seeing, but other targets are calling. I am on the fence. I am relieved in one respect--I have thought that there was a problem with my mount, as guiding has been rough lately. However, totral rms values were as low as 0.29", confirming that seeing is the culprit.

On another note-I call this nebula the African Nebula, as there is a remarkably realistic outline of the dark continent near the core. Its rotated on its side, whith west African bulge pointing down, and the cape of good hope pointing to the right. If you rotate the image, it becomes obvious. Version D is a crop of the center rotated to reveal Africa right side up.

D

Description: Africa - right side up orientation

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E

Description: A bit bolder

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I

Description: Sharpening

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J

Description: Reprocess

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M

Description: Sharpening and Star reduction Z2

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Status	Advanced success
Started	...
Astrometry.net job	6844039
PixInsight job	9LPWY4GR3OZWSBVY9U8710G0EHDW0M1X
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h34m15s.308
RA (top/left)	20h32m56s.982
RA (top/right)	20h35m47s.759
RA (bottom/right)	20h35m34s.840
RA (bottom/left)	20h32m42s.478

Dec (center)	+45°40′00″.71
Dec (top/left)	+45°27′12″.29
Dec (top/right)	+45°30′29″.93
Dec (bottom/right)	+45°52′44″.51
Dec (bottom/left)	+45°49′26″.67

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Sh2-112 HaSHO

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