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CCD Images - Session 315 (2008-10-13)

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Objects Session Notes
Bullet M57 - Planetary Nebula ("Ring Nebula")
Bullet Astrometric & Photometric Monitoring
- SS Cyg   (dwarf nova)
- SS Her, U Her (mira variables)
- R CrB, RU Peg, GK Per (variables)

- U Sge attempt (failed due to cloud)


- Short evening session  (1.6 hrs), cut short by developing cloud
- Ambient Temperature 6.5 degC (minimum) j
- CCD operation of -20 degC 
(at 76% average cooling).  
- main objective of the session was  to acquire images of key selected stars for ongoing photometric and astrometric analysis. 
- opportunity taken to take a set of images of M57


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M57 - Planetary Nebula ("Ring Nebula")

M57 (Lyra) 
Image
CCD Image (60% size)
3 x 60s exposure (average combine), 1x1 binning, C Filter 
2008-10-13 19:14 hUT (#315009-11)
[ Full size image ]
  
M57 - detail 
Image
CCD Image (150% size, cropped)
Image details as above

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 315  (2008-10-13)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site