Sh2-155 (Cave Nebula), VdB 155, LDN 1216

Located in the constellation Cepheus near the border with Cassiopeia, the Cave Nebula (Sh2-155 or Caldwell 9), is a dim and very diffuse bright nebula within a larger nebula complex known as Cepheus B. This complex contains also LDN 1216 - a large dark nebula above Sh2-155 and VdB 155 - the blue reflection nebula just right of LDN 1216.The stars of this region are members of the Cepheus OB3 association. They are very young, less than 100000 years old. A star formation is occurring within Cepheus B and is particularly evident within the dust clouds of the Cave Nebula.



Object Details:

Objects: Sh2-155 (Caldwell 9), VdB 155, LDN 1216
Constellation: Cepheus
Center of field: RA: 22h 56m 30s Dec: +62° 08' 15"
Field dimensions: Ca 60 x 90 '


Technical Details:

Optics: 12" ASA Astrograph at F/3.6
Mount: ASA DDM 85
Camera: SBIG STL-11000M
Filters: Astronomik LRGB filters, Baader 8nm Ha filter
Dates/Times: 31 October, 3 November 2011
Location: Rozhen
Exposure Details: L = 120 min, R = 60 min., G = 60 min.,B = 60 min.;Ha = 180 min
Subexposures: LRGB 10 minutes, Ha 15 minutes
Acquisition: CCD Soft
Processing: PixInsight, Photoshop CS

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