Simeis 57 - DWB 111/118/119 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg)

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Simeis 57 - DWB 111/118/119

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Simeis 57 - DWB 111/118/119

This emission nebula is located in the constellation of Cygnus. It is one of the few objects whose distance from us is still unknown, although recent studies conclude that it is a fairly nearby object. Most people refer to it as the Propeller Nebula, an obvious namesake. A few deviant individuals refer to it as the Sprinkler Nebula.

This object is a fairly bright emission nebula but does not appear in either the LBN or Sharpless catalogues. Although some refer to this object as DWB 111, the object actually consists of three DWB objects - 111, 118 and 119. Its proper designation is Simeis 57, identified in a paper by Gaze and Shajn in a Crimean journal in the 1950's. The name Simeis originates with an older astronomy facility operated by the Crimean Astrophysical Observatory in the city of Simeiz. The only other popular Simeis object is Simeis 147 (The Spaghetti Nebula).

The object shape is fascinating to me - a pair of opposing bright reddish arcs which are almost identical in appearance. It is hard for me to imagine how an object like this was formed.

Surprisingly, this emission nebula has not yet been associated with any star.

The refractors!
Cloudy Nights
ZWO ASI1600MM/QHY163M

HII-Dominated Nebulae
Orphaned Beauties Catalog (Complete)

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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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Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Status	Advanced success
Started	...
Astrometry.net job	2234808
PixInsight job	AXESJ1BRJKA2WVAM06S0W03PDDO0MVW6
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	20h16m09s.760
RA (top/left)	20h14m52s.399
RA (top/right)	20h14m42s.366
RA (bottom/right)	20h17m24s.807
RA (bottom/left)	20h17m36s.868

Dec (center)	+43°40′56″.16
Dec (top/left)	+44°03′44″.50
Dec (top/right)	+43°19′23″.92
Dec (bottom/right)	+43°18′04″.81
Dec (bottom/left)	+44°02′24″.90

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Simeis 57 - DWB 111/118/119

Simeis 57 - DWB 111/118/119

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Simeis 57 - DWB 111/118/119

Simeis 57 - DWB 111/118/119

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