Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)
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Sh1-118, 



    
        

            Peter Goodhew
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Sh1-118

Revision title: Crop

Getting plate-solving status, please wait...
Sh1-118, 



    
        

            Peter Goodhew
Powered byPixInsight

Sh1-118

Revision title: Crop

Acquisition details

Frames:
Astrodon Gen1 E-Series Tru-Balance Blue: 17×300(1h 25′) bin 1×1
Astrodon Gen1 E-Series Tru-Balance Red: 20×300(1h 40′) bin 1×1
Astrodon Gen2 E-Series Tru-Balance Green 1.25": 20×300(1h 40′) bin 1×1
Astrodon H-alpha 5nm 1.25": 157×900(39h 15′) bin 1×1
Integration:
44h

RA center: 00h07m20s.365

DEC center: +64°5720.15

Pixel scale: 0.265 arcsec/pixel

Orientation: 0.788 degrees

Field radius: 0.175 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 3738x2959

File size: 1.0 MB

Data source: Own remote observatory

Remote source: e-EyE Extremadura

Description

An HII emission nebula in Cassiopeia with a confused identity crisis. It was in Stewart Sharpless's 1953 catalog as an emission nebula, but dropped from his second catalog as it was then believed to be a planetary nebula.  More recently it has been confirmed that it is NOT a planetary nebula.  It is 164 arc seconds in diameter.  It is estimated to be around 4,000 light years away, and around 3 light years across.

Comments

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  • Sh1-118, 



    
        

            Peter Goodhew
    Original
  • Final
    Sh1-118, 



    
        

            Peter Goodhew
    D

D

Title: Crop

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Sh1-118, 



    
        

            Peter Goodhew