C9 Sh2-155 Cave Nebula
C9 Sh2-155 Cave Nebula
Selected by NASA for Astronomy Picture of the Day Nov 6th 2015
The Cave Nebula Sh2-155 or Caldwell 9, is in the constellation Cepheus. It is approximately 2400 light years away, and 35 light years across. It is a dim, and diffuse bright nebula, within a larger nebula complex containing reflection, emission, and dark nebulosity. This image is a narrowband image containing 15.5 hrs of Ha OIII SII and also Luminance added in the amount of 6.5 hrs. Total exposure time 22hrs
FS Image
Ha 300min
OIII 300min
SII 330min
Luminance 380 min
Scope Planewave 17″
Camera SBIG 11002 and AOX
Mount Paramount ME
Filters Astrodon Ha5nm OIII3nm SII3nm Luminance
Exposures Ha 5hrs OIII 5hrs 5.5SII hrs 30min subs // Lum 6.3hrs 20min subs
Location SRO observatories 2014
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Below is an Image of C9 Cave Nebula with TMB 130mm from 2011
Sh2-155 20min Ha Subframes x 20 = 400 min combined image
Sh2-155 20min OIII Subframes x 12 = 240 min combined image
Sh2-155 20min SII Subframes x 15 = 300 min combined image
Scope TMB130mm
Camera Apogee U8300
Mount Atlas EQG
Filters Astrodon Ha5nm OIII3nm SII3nm
Exposures Ha 6.6hrs OIII 4hrs SII 5hrs 20min subs
Location Connellsville Pa. Home Observatory 2011