David's Astronomy Pages
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 Images (S215) |
 Images Sessions |
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 Images (S217) |
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Objects Session Notes
NGC 6946 - Spiral Galaxy Astrometric & Photometric Monitoring
- SS Cyg (Dwarf Nova)
- BL Lac (Blazar)
- U Her (Mira variables)
- SZ Her (Variable)
- Barnard's Star, 61 Cyg (Nearby Stars)
- short session (1.7 hour duration) - sky conditions rapidly deteriorating with cloud - CCD operation of -20 degC (at 78% average cooling). - main objectives were to acquire images of selected variable stars and nearby stars for ongoing photometry and astrometry - opportunity was taken to acquire images of the spiral galaxy NGC 6946 whilst waiting for CCD camera and telescope tube to stabilise.
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NGC 6946 (Cygnus) . |
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| CCD Image 4 x 120s exposure (average combine), 2x2 binning, C Filter, Linear brightness scaling 2007-09-11 00:26 hUT (#216017-20) |
| Earlier image of NGC 6946 taken in 2004 |
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CCD Image 3 x 5min (average combine), C Filter, Autoguided 2004-11-02 00:41 h UT (#74015-17) |
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Images collected for Astrometric Monitoring
of Nearby Stars Project
Images collected for Photometric Monitoring
of Variable Stars
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| This Web Page: | CCD Images - Session 216 (2007-09-29) |
| Last Updated : | 2015-05-16 |
| Site Owner : | David Richards |
| Home Page : | David's Astronomy Web Site |
