Sh2-115 and Abell 71 (Jeff Weiss)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: LBN 357 · LBN 358 · LBN 362 · PK085+04.1 · Sh2-115 · Sh2-116

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Sh2-115 and Abell 71

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Sh2-115 and Abell 71

HaLRGB 9.0 hours

Sh2-115 is a faint emission nebula in Cygnus at 7500 light years within the larger Cygnus-X starforming region. It is only beginning to be hollowed out by the ~100 MY-old open cluster Berkeley 90 powering the emission nebula and located slightly NW of the 5.6 magnitude star below the center of the image (North is to the right). Abell 71 (Sh2-116) is the small circular object in the lower right (NE). Abell 71 was considered a planetary nebula (PK 85+4.1) but, due to lack of OIII, it is now considered another very small hydrogen emission nebula. Close examination of it in the image, however, shows two arms which seems very unusual to me for an emission nebula.

This image was first light with a new Riccardi Focal Reducer 0.75x for APM that brought a wider field of view for this image and f/4.5 for my setup.

Data taken at D.A.R.C. Observatory, Mercey Hot Springs , CA on 9/20/14 and 9/22/14

10/22/19 cropped out the "face" in the lower part of this image that always bothered me to concentrate more on the filaments and the small Abell 71 object to make a more interesting image.

10/1/20 rotated the image so that North is to the right and cropped it to give Abell 71 more prominence.

Original
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J
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Final
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Status	Advanced success
Started	...
Astrometry.net job	3905924
PixInsight job	FTKZEHK9YYAL2MQVXZZBFH2ADNN6SMPE
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h33m44s.56
RA (top/left)	20h36m44s.47
RA (top/right)	20h36m40s.61
RA (bottom/right)	20h30m41s.66
RA (bottom/left)	20h30m51s.36

Dec (center)	+47°01′30″.2
Dec (top/left)	+46°31′55″.7
Dec (top/right)	+47°31′56″.5
Dec (bottom/right)	+47°30′45″.8
Dec (bottom/left)	+46°30′49″.8

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Sh2-115 and Abell 71

Sh2-115 and Abell 71

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Sh2-115 and Abell 71

Sh2-115 and Abell 71

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