Click on the image for FULL RES
Name / Constellation

SH2-155

 Other: Caldwell 9; LBN 110.11+02.44; Cave nebula

Cep
Coordinates AR: 22h 57m 17.4sec - Dec: +62° 28' 33.4"
Optics Takahashi FSQ 106N APO Fluorite F5 - 60/220 guiding refractor
Camera-Mount SBIG STF8300M - Orion StarShot Guider - 10Micron GM2000 QCI Mount
Filters Baader Halpha - LRGB
Exposure
  • Halpha
  • Luminance
  • Red
  • Green
  • Blue
  • 16 x 900 sec - 4 hours
  • 13 x 900 sec - 3 hours 15 min
  • 14 x 900sec - 3 hours 30 min
  • 14 x 900 sec - 3 hours 30 min
  • 14 x 900 sec - 3 hours 30 min
  • UNBINNED
  • UNBINNED
  • BINNING 2X2
  • BINNING 2X2
  • BINNING 2X2
Location / Date Promiod (Valle D'Aosta-Italy) "TLP" Remote Observatory - 12 / 14 oct 2017
Seeing 2 " @ 2.1 arcosec/pixel unbinned
Note  
Acquisition MaxIm DL - CCD Autopilot 5
Processing Adobe Photoshop CS5 -
Comment

SH2-155 is an emission nebula part of large nebula complex including emission, reflection and dark nebulosity. It is a inozed H-II region with ongoing star formation. Famous astronomer Patrick Moore called it "Cave Nebula" . Apparent ma 7.7 and apparent size 50' x 30'. It's 2400 light-years away.