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CCD Images - Session 221 (2007-10-17)

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Objects Session Notes
Bullet SU UMa - Cataclysmic Variable
Bullet Saturn
Bullet Astrometric & Photometric Monitoring
- SS Cyg, U Gem (Dwarf Nova)
- BL Lac (Blazar)
- U And, W And (Mira variables)
- ER UMa, SU UMa, Z And (variables)
- Gliese 412, Groombridge 1618, Groombridge 1830 (Nearby Stars)
- morning session (2.8 hr) just before dawn. Fairly cold, ground frost.
CCD operation of -20 degC (at 60% average cooling). 
- main objective of the session was to acquire a further image of the current comet C/2007 (LONEOS), however the dawn light became too bright comet by the time the comet rose above my observatory wall.
- opportunity was also taken to acquire images of selected stars for ongoing astrometric and photometric monitoring 

SU UMa - Cataclysmic Variable

Animation sequence of images showing variation in SU UMa 
(images from 5 separate nights between Apr 2007 & Oct 2007)

Image

Animated CCD Images
180 sec exposure, 2x2 binning, V Filter
2007-04-28 (#192248), 2007-08-08 (#203184), 2007-08-22 (#206056)
2007-08-25 (#207032), 2007-10-17 (#221109)
   
SU UMa (Ursa Major)
Magnitude Variation during Mar - Oct 2007
Dataset comprising observations from 9 nights 
between 2007-03-13 and 2007-10-17
Note : The dataset shows a 4.5 mag variation between a peak (+11.8) and minimum (+16.3)
This compares with a 4.2 mag variation listed in the GCVS catalog variation of (+10.8 to 14.96)
Image 

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Saturn 

Saturn 

Image
Annotated CCD Image
0.2s exposure, 1x1 binning, C Filter
2007-10-17 05:52 hUT (#221136)

  

Saturn Moons

Image
Annotated CCD Image
3s exposure, 1x1 binning, C Filter
2007-10-17 05:56 hUT (#221143)

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 221 (2007-10-17)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site