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CCD Images - Session 216 (2007-09-29)

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Objects Session Notes
Bullet NGC 6946 - Spiral Galaxy
Bullet 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.

NGC 6946 - Spiral Galaxy

NGC 6946 (Cygnus)

Image
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
Image
CCD Image
3 x 5min (average combine),  C Filter, Autoguided
2004-11-02 00:41 h UT (#74015-17)

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Astrometric and Photometric Monitoring

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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