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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