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Sh2-308 Gourd Nebula



 

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Common Name Gourd Nebula
Formal Name Sh2 308
Date 2/24/2017/3/10/2017
Constellation Canis Major
Location BrewSky Observatory, Casa Grande, AZ
Equipment Takahashi FSQ106ED on Paramount MX, SBig STF8300M Camera/Filter Wheel/STi guider
Temperature −10°C
Exposures
# Exp (sec) Filter Bin Net Time (hr)
4 1800 HAlpha 1x1 2
6 1800 OIII 1x1 3
Total 5 hrs
Processing Calibrated in Maxim
Aligned/Stacked/Processed in PixInsight.
Notes
  • 5,200 light-years away
  • diameter of 60 light-years
  • 2/3 degree on the sky
  • Bubble age about 70,000 years
  • Wolf-Rayet star at center
    • 20 times Sun mass
    • Very hot star
    • Pre-supernova stage, low hydrogen, high helium