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CCD Images - Session 227 (2007-10-25)

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Objects Session Notes
Bullet Comet 17P/Holmes (2007-10-30 update)
Bullet Comet 17P/Holmes (2007-10-25)  
Bullet Astrometric & Photometric Monitoring
- SS Cyg (Dwarf Nova)
- BL Lac (Blazar) 
- RX And, CY Lyr, TZ Lyra (variables)
- U And  (Mira Variable)
- (unsuccessful attempts at TT Ari due to cloud)
- 2 hr session, full moon, cloud developing towards end of session, very windy (dew shield not used).
CCD operation of -20 degC (at 85% average cooling). 
- main objective of the session was to acquire an images of newly brightened comet 17P/Holmes

Comet 17P/Holmes (2007-10-30 update)

Comet 17P/Holmes - explosive eruption
Frames taking on Oct 25th, 29th 30th showing expanding coma 
that relates to the 2007-10-23 eruption event

 2007-10-25 (2.1 arc min diam) 
2007-10-29 (7.0 arc min diam)
2007-10-30 (9.3 arc min diam)

Image
Animated CCD Images
5 x 10s exposure (average combine), 2x2 binning, C Filter, 
Log Scale
Frame 1 : 2007-10-25 20:45h UT (#227055-59)
Frame 2 : 2007-10-29 04:43h UT (#228038-42)
Frame 3 : 2007-10-30 04:47h UT (#229035-39)

[More pictures from 17P/Holmes from 2007-10-30]

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Comet 17P/Holmes (2007-10-25) 

Comet 17P/Holmes 
(passing through starfield in Perseus)

Image
CCD Image Mosaic (3 x 4), 60% size
30s exposure, 2x2 binning, C Filter, Linear Scale
2007-10-25 21:06h UT (#227091-102)
[ Full Size ]

  

Comet 17P/Holmes 

Image
Annotated CCD Image 
Log Scale
5 x 10s exposure (average combine), 2x2 binning, C Filter, 
2007-10-25 20:45h UT (#227055-59)

  

Image
Annotated CCD Image 
5s, 2x2 Binning, C Filter, Log Scale
2007-10-25 20:38h UT (#227015)

  

 Image
Annotated CCD Image 
60s, 2x2 Binning, C Filter, Linear Scale
2007-10-25 20:58h UT (#227088)

 

Image
Approximate Colour CCD Image
Red: 15s (R), Green: 15s (V),  Blue: 30s (B), 2x2 Binning
2007-10-25 20:50h UT (#227070-72)
 

Comet 17P/Holmes - Fine detail Processing

Image
Original CCD Image 
5s, 2x2 Binning, C Filter, Linear Scale
2007-10-25 20:38h UT (#227015)
Image
Processed CCD Image
Rotational Gradient Processing, 20 deg
(Image details as above)
[Full Size]
 
Image
Processed CCD Image
Rotational Gradient Processing, 20 deg, Blurred
(Image details as above)
  

Comet 17P/Holmes - enlarged

Image
False Colour CCD Image (250% size)
(Image details as above)
  
Image
CCD Image (250% size)
5s, 2x2 Binning, C Filter, Linear Scale
2007-10-25 20:38h UT (#227015)
  
Image
False Colour CCD Image (250% size)
5s, 2x2 Binning, C Filter, Square Root Scale
False Colour (Inverse Spectrum)
2007-10-25 20:38h UT (#227015)

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 227  (2007-10-25)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site