Sh2-155 (Cave Nebula) - Hydrogen alpha
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S 155 also known as the Cave Nebula, Sh2-155 or Caldwell 9, is a dim and very diffuse bright nebula within a larger nebula complex containing emission, reflection, and dark nebulosity. It is located in the constellation Cepheus.
Visually it is a difficult object, but with adequate exposure, makes a striking image. The nebula gets its name Cave Nebula from the dark lane at the eastern side abutting the brightest curve of emission nebulosity which gives the appearance of a deep cave when seen through a telescope visually.
Imaging telescopes or lenses: Takahashi FSQ106ED
Imaging cameras: QSI 6120i
Mounts: Takahashi EM 400 Temma 2
Guiding telescopes or lenses: Takahashi FS 60 CB
Guiding cameras: QHY CCD QHY 5 II
Focal reducers: Takahashi QE 0.73x
Software: PHD 2, Pleiades Astrophoto PixInsight , Sequence Generator Pro SGP
Filters: Astrodon OIII 3nm
Accessories: Robofocus Focuser, ATIK EFW2
Resolution: 2125 x 1419
Dates: 17th - 24th Jun '16
Frames:
Astrodon Ha 3nm: 48x1200" bin 1x1
Integration: 16 hours
Center (RA, Dec):(344.226, 62.541)
Center (RA, hms):22h 56m 54.223s
Center (Dec, dms):+62° 32' 27.444"
Size:86.7 x 56.1 arcmin
Radius:0.861 deg
Pixel scale:1.64 arcsec/pixel
Orientation:Up is 89.9 degrees E of N
Visually it is a difficult object, but with adequate exposure, makes a striking image. The nebula gets its name Cave Nebula from the dark lane at the eastern side abutting the brightest curve of emission nebulosity which gives the appearance of a deep cave when seen through a telescope visually.
Imaging telescopes or lenses: Takahashi FSQ106ED
Imaging cameras: QSI 6120i
Mounts: Takahashi EM 400 Temma 2
Guiding telescopes or lenses: Takahashi FS 60 CB
Guiding cameras: QHY CCD QHY 5 II
Focal reducers: Takahashi QE 0.73x
Software: PHD 2, Pleiades Astrophoto PixInsight , Sequence Generator Pro SGP
Filters: Astrodon OIII 3nm
Accessories: Robofocus Focuser, ATIK EFW2
Resolution: 2125 x 1419
Dates: 17th - 24th Jun '16
Frames:
Astrodon Ha 3nm: 48x1200" bin 1x1
Integration: 16 hours
Center (RA, Dec):(344.226, 62.541)
Center (RA, hms):22h 56m 54.223s
Center (Dec, dms):+62° 32' 27.444"
Size:86.7 x 56.1 arcmin
Radius:0.861 deg
Pixel scale:1.64 arcsec/pixel
Orientation:Up is 89.9 degrees E of N
Sky Plot
Annotated Image
