Click here for a full resolution image of The Cave Nebula (1.17 Mb)

 

 

The Details
Object
Sharpless 2-155 The Cave Nebula in Cepheus
Optics
Astro-Physics 160 EDF refractor at f/7.7
Platform
Astro-Physics 1200 GTO
Camera
SBIG STL-11000M
Filters
Baader 6nm Hydrogen Alpha filter
Date
17 August 2007, 20 August 2007
Location
Mount Wilson Observatory - Mount Wilson, CA
Exposure
Ha 16 x 1800 sec, 1x1 bin
Software
Maxim DL/CCD, Registar, Photoshop CS2
Orientation
Field of View: 01°38'03" x 01°05'13" centered on RA 22h57m26.8s
DEC+62°38'19" (2000.0) . North angle 90.05 °; east 90° CCW from north.
Notes

Sharpless 2-155 is an extremely faint emission nebula located midway on a line between Alpha Cephei (Alderamin) and Beta Cassiopeiae (Caph). Although not a problem for amateur imagers with CCD cameras, The Cave Nebula is an observer's challenge visually and has stumped many wishing to observe it though an eyepiece with large aperture scopes from dark sky sites. Its faintness is attested to by the fact that the above image has a total integration time of 8 hours.

 

 

 

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