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CCD Images - Session 237 (2007-11-28)

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Images (S238)
 
Objects Session Notes
Bullet 17P/Holmes - Comet
Bullet NGC 1555 (Hind's Variable Nebula)
Bullet Astrometric & Photometric Monitoring
- SS Cyg (dwarf nova)
- BL Lac (Blazar)
- RX And, TT Ari (variables)
- CY Lyr, TZ Lyr  (variables)
- HH And, 61 Cyg, Groombridge 34, HIP 3929, Teegarden's Star (Nearby Stars)
- Evening session (2.9hr), operated under automated control for majority of session.
CCD operation of -20 degC (at 57% average cooling). 
- main objective of the session was to acquire an image mosaic of comet 17P/Holmes (now grown to larger than the apparent diameter of the moon)
-secondary objectives were to acquire images of certain selected stars of ongoing photometric and astrometric analysis
-opportunity was also taken to acquire gallery images of Caldwell 51 (IC 1613), and certain other comets and deep sky objects.

17P/Holmes - Comet  

Comet 17P/Holmes  - passing through starfield in Perseus,  2007-11-28

Image
Part of CCD Image Mosaic (6 x 7), 35% size
30s exposure, 2x2 binning, C Filter,  Linear Scale
2007-11-28 21:22h UT (#237063-104)
[ Full Mosaic, 70% Size ]
      
Image
Part of CCD Image Mosaic (6 x 7), 35% size
30s exposure, 2x2 binning, C Filter,  Linear Scale
Rotational Gradient Processed (15 deg rotation)
2007-11-28 21:22h UT (#237063-104)
 

Comet 17P/Holmes - Central Detail

Image
CCD Image (50% size), Linear Scale
7 x 60s exposure (av. combine), 1x1 binning, C Filter, 
2007-11-28 20:57h UT (#237051-57)
 
Isophote Lines
Image
False Colour CCD  Image (50% size)
Square Root brightness scaling & Isophote Contoured, 
False Colour (Inverse Spectrum). Details as above

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NGC 1555 - Nebula ("Hind's Variable Nebula")

NGC 1555 - "Hind's Variable Nebula" (Taurus) 
The Nebula is also known as 
"Struve's Lost Nebula" and "Burnham's Nebula"
The adjacent bright star is variable star T Tau

Image
Annotated CCD Image
5 x 180s exposure (average combine), 
2x2 binning, C Filter, Linear brightness scaling
2007-11-28 21:53 hUT (#237109-13)
 

Hind's Variable Nebula - detail

 Image
CCD Image (200% size)
Image details as above
 

Hind's Variable Nebula - detail from 2007-10-05

Image 
CCD Image (200% size)
5 x 180s exposure (average combine), 
2x2 binning, C Filter, Linear brightness scaling
2007-10-05 04:38 hUT (#219053-57)
 

Hind's Variable Nebula - detail from 2007-09-11

Image 
CCD Image (200% size)
6 x 180s exposure (average combine), 
2x2 binning, C Filter, Linear brightness scaling, Cropped)
2007-09-11 01:05 hUT (#211121-26)

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 237  (2007-11-28)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site