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CCD Images - Session 255 (2008-01-20)

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Objects Session Notes
Bullet SS Cyg - UGSS type variable star
Bullet Astrometric & Photometric Monitoring
- SS Cyg, U Gem (dwarf nova)
- BL Lac (Blazar)
- TT Ari, RX And, Z And (variables)



- Evening session (3.7hr). Poor sky conditions. Full moon
- CCD operation of -25 degC (at 75% average cooling). 
- main objective was to acquire images of certain selected stars of ongoing photometric analysis, 

SS Cyg  - UGSS type variable star

SS Cyg (Cygnus)
Regular photometric measurements of SS Cyg seem to indicate that 
Jan 2008 cataclysmic eruption is noticeably less bright than normal eruptions, having peaked at ~ +9.5 (V), approximately one magnitude less than normal peak of ~+8.5 (V)

Image
 
 Image
 CCD Image
3 x 30s exposure (average combine), 2x2 binning, V Filter,
2008-01-20 22:17 hUT (#255005-13)

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 255  (2008-01-20)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site