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Getting plate-solving status, please wait...
The Cave Nebula (SH2-155) in SHO, 


            Chuck's Astrophot...
The Cave Nebula (SH2-155) in SHO

The Cave Nebula (SH2-155) in SHO

Technical card

Resolution: 2469x1853

Dates:Sept. 17, 2018Sept. 22, 2018Oct. 9, 2018

Astronomik Ha: 183x240" (gain: 139.00) -20C bin 1x1
Astronomik OIII: 105x240" (gain: 75.00) -20C bin 1x1
Astronimik SII: 105x240" (gain: 139.00) -20C bin 1x1

Integration: 26.2 hours

Darks: ~50

Flats: ~50

Bias: ~50

Avg. Moon age: 6.86 days

Avg. Moon phase: 49.55% job: 2995683

RA center: 22h 57' 24"

DEC center: +62° 28' 12"

Pixel scale: 1.683 arcsec/pixel

Orientation: 87.817 degrees

Field radius: 0.722

Data source: Backyard


The weather finally broke and I was able to complete the Cave Nebula after collecting the first light on it around 3 weeks ago. Ha and SII were very strong, but OIII was weak so it took some extra processing work to bring it out.

Thank you to the people that run NASA APOD for selecting this image on November 14, 2018.



Chuck's Astrophot...
License: None (All rights reserved)


  • The Cave Nebula (SH2-155) in SHO, 


            Chuck's Astrophot...
  • Final
    The Cave Nebula (SH2-155) in SHO, 


            Chuck's Astrophot...


Minor color fix.

Sky plot

Sky plot


The Cave Nebula (SH2-155) in SHO, 


            Chuck's Astrophot...