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CCD Images - Session 232 (2007-11-04)

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Objects Session Notes
Bullet Comet 17P/Holmes
Bullet Astrometric & Photometric Monitoring
- SS Cyg (dwarf nova)
- BL Lac (Blazar)
- U Her (mira variable)
- Barnard's Star (Nearby Star)
 

-
(unsuccessful attempts at - U Her due to cloud)
- Short evening session (1.6hr), thin cloud / poor transparency as per previous evening. Session cut short by developing cloud.
CCD operation of -20 degC (at 77% average cooling). 
- main objective of the session was to acquire follow up images of the comet 17P/Holmes 
-secondary objectives were to acquire images of certain selected stars of ongoing photometric and astrometric analysis

Comet 17P/Holmes  

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

Image
CCD Image Mosaic (3 x 3)
Linear Scale, 50% size
20s exposure, 2x2 binning, C Filter, 
2007-11-02 22:57h UT (#230054-62)
[100% Size]
 

Comet 17P/Holmes - Detail

Image
CCD Image (50% size)
Linear Scale
7 x 60s exposure (average combine), 1x1 binning, C Filter, 
2007-11-04 18:43h UT (#232032-38)
 
Image
False Colour CCD  Image (50% size)
Square Root brightness scaling & Isophote Contoured, 
False Colour (Inverse Spectrum)
(Image details as above)
Isophote Lines from earlier session (2007-11-03)
Image
False Colour CCD  Image (50% size)
Square Root brightness scaling & Isophote Contoured, 
False Colour (Inverse Spectrum)
2007-11-03 18:08h UT (#231055-61)
 
Isophote Lines from earlier session (2007-11-02)
Image
False Colour CCD  Image (50% size)
Square Root brightness scaling & Isophote Contoured, 
False Colour (Inverse Spectrum)
2007-11-02 22:45h UT (#230038-44)
 
Isophote Lines from earlier session (2007-10-30)
Image
False Colour CCD  Image (50% size)
Square Root brightness scaling & Isophote Contoured, 
False Colour (Inverse Spectrum)
2007-10-30 04:44h UT (#229028)
Isophote Lines from earlier session (2007-10-29)
Image
False Colour CCD  Image
Square Root brightness scaling & Isophote Contoured, 
False Colour (Inverse Spectrum)
2007-10-29 04:42h UT (#228038-42)
Isophote Lines from earlier session (2007-10-25)
Image
False Colour CCD  Image
Square Root brightness scaling & Isophote Contoured, 
False Colour (Inverse Spectrum)
2007-10-25 20:40h UT (#227015-26)
 

Comet 17P/Holmes - Rotational Gradient Processing

Normal Image
Image
CCD Image (50% size)
Linear Scale
7 x 60s exposure (average combine), 1x1 binning, C Filter, 
2007-11-04 18:43h UT (#232032-38)
 
Image 
Processed CCD Image  (50% size)
Rotational Gradient Processing, 20 deg
(Image details as above)
 
Detail
Image 
Processed CCD Image  (100% size)
Rotational Gradient Processing, 20 deg
Cropped
(Image details as above)
 
Alt Processing (IrisSoftware, 12 deg rotation)
Image 
Processed CCD Image  (100% size)
Rotational Gradient Processing, 12 deg
Cropped
(Image details as above)
  

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 232  (2007-11-04)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site