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CCD Images - Session 231 (2007-11-03)

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Objects Session Notes
Bullet Comet 17P/Holmes
Bullet Astrometric & Photometric Monitoring
- SS Cyg (dwarf nova)
- BL Lac (Blazar)
- U And, W And (mira)
- Z And, TT Ari, RX And (variables)
- TZ Lyr, CY Lyr (variables)
- Barnard's Star, Gliese 725 (Nearby Stars)
 

-
(unsuccessful attempts at U Her due to cloud)
- Evening session (5.7hr), thin cloud / poor transparency throughout
CCD operation of -25 degC (at 70% average cooling). 
- main objective of the session was to acquire images of SS Cyg (dwarf nova) in case it had recently erupted (eruption is anticipated and my last observations were on Oct 25th) 
-other objectives were to acquire images of certain selected stars of ongoing photometric and astrometric analysis and attempt a follow-up observation on SN 2007le (NGC 7721)
- secondary objective was to acquire images of 17P/Holmes and selected stars for ongoing astrometric and photometric analysis

Comet 17P/Holmes  

Comet 17P/Holmes  (passing through starfield in Perseus)
(Mosaic collected under poor sky condition, 
causing light balance problems)

Image
CCD Image Mosaic (3 x 4)
Linear Scale, 50% size
30s exposure, 2x2 binning, C Filter, 
2007-11-03 21:40h UT (#231263-74)
 
 

Comet 17P/Holmes - Detail

Image
Approximate Colour CCD Image (CBVR)
Linear Scale, 2x2 binning
Luminance : 30s (C), Red: 30s (R), Green: 30s (V),  Blue: 60s (B)
2007-11-03 22:26h UT (#231311-22)
 
Image
CCD Image 
Linear Scale
7 x 60s exposure (average combine), 1x1 binning, C Filter, 
2007-11-03 18:08h UT (#231055-61)
 
Image
False Colour CCD  Image
Square Root brightness scaling, Isophot Contoured, False Colour (Inverse Spectrum)
(Image details as above)
 

Comet 17P/Holmes - Rotational Gradient Processing

 
Processed CCD Image
Rotational Gradient Processing, 20 deg
Cropped
(Image details as above)
  

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This Web Page: CCD Images - Session 231  (2007-11-03)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site