Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)
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Simeis 57 - DWB 111/118/119, 



    
        

            Gary Imm
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Simeis 57 - DWB 111/118/119

Getting plate-solving status, please wait...
Simeis 57 - DWB 111/118/119, 



    
        

            Gary Imm
Powered byPixInsight

Simeis 57 - DWB 111/118/119

Imaging telescopes or lenses: Takahashi TOA-130NFB

Imaging cameras: ZWO ASI1600MM-Cool

Mounts: Astro-Physics Mach1GTO

Guiding telescopes or lenses: Orion 60mm Guidescope

Guiding cameras: Orion StarShoot AutoGuider Pro Mono

Focal reducers: Takahashi Reducer TOA130R

Software: Main Sequence Software Sequence Generator Pro  ·  PixInsight  ·  Stark Labs PHD2 2.6.3

Filters: Astrodon Ha 31mm 5nm  ·  Astrodon Green 31mm Gen2 I-Series  ·  Astrodon Blue 31mm Gen2 I-Series  ·  Astrodon Red 31mm Gen2 I-Series

Accessory: ZWO EFW  ·  Feathertouch Focuser Boss II Electronic Focusing Control


Dates:Aug. 19, 2018

Frames:
Astrodon Blue 31mm Gen2 I-Series: 60x30" (30') (gain: 139.00) -10C bin 1x1
Astrodon Green 31mm Gen2 I-Series: 60x30" (30') (gain: 139.00) -10C bin 1x1
Astrodon Ha 31mm 5nm: 24x300" (2h) (gain: 139.00) -10C bin 1x1
Astrodon Red 31mm Gen2 I-Series: 60x30" (30') (gain: 139.00) -10C bin 1x1

Integration: 3h 30'

Avg. Moon age: 8.47 days

Avg. Moon phase: 61.51%


Astrometry.net job: 2234808

RA center: 20h 16' 9"

DEC center: +43° 40' 56"

Pixel scale: 0.781 arcsec/pixel

Orientation: -87.420 degrees

Field radius: 0.444 degrees


Resolution: 3408x2272

Locations: Backyard (Mag 20.8 - Bortle 4.5), Onalaska, Texas, United States

Data source: Backyard

Description

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.

Comments

Sky plot

Sky plot

Histogram

Simeis 57 - DWB 111/118/119, 



    
        

            Gary Imm