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CCD Images - Session 235 (2007-11-16)

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Images (S236)
 
Objects Session Notes
Bullet 17P/Holmes - Comet
Bullet 93P/Lovas - Comet
Bullet NGC 1058 - Spiral Galaxy
Bullet UGC 12846 - Spiral Galaxy with Supernova 2007od
Bullet IC 1613 - irregular galaxy, local group
Bullet Astrometric & Photometric Monitoring
- SS Cyg (dwarf nova)
- BL Lac (Blazar)
- U And, W And (mira variable)
- RX And, TT Ari (variables)
- CY Lyr, TZ Lyr, Z And (variables)
- Barnard's Star, 61 Cyg, Teegarden's Star (Nearby Stars)
- Evening session (7.4hr), operated under automated control for majority of session. Cold for 5-6 hrs, but then temperatures rose by 5 deg and seeing deteriorated as a warm front came through.  Eventually thin cloud developed.
CCD operation of -25 degC (at 67% average cooling).  Backed off to -20 degC from last part of session.
- 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,  2007-11-16
bright star in bottom left corner is the star Mirfak (Alpha Persei)

Image
Part of CCD Image Mosaic (6 x 7), 35% size
30s exposure, 2x2 binning, C Filter,  Linear Scale
2007-11-16 23:31h UT (#235301-42)
[ Full Mosaic, 70% Size ]

 

Image
Part of CCD Image Mosaic (6 x 7), 70% size
30s exposure, 2x2 binning, C Filter, Linear Scale
2007-11-16 23:31h UT (#235301-42)
[ Full Size ]
 

Comet 17P/Holmes - Central Detail

Image
CCD Image (50% size), Linear Scale
7 x 60s exposure (av. combine), 1x1 binning, C Filter, 
2007-11-16 19:23h UT (#235106-12)
 
Isophote Lines
Image
False Colour CCD  Image (50% size)
Square Root brightness scaling & Isophote Contoured, 
False Colour (Inverse Spectrum). Details as above
 
 Image
Processed CCD Image  (50% size)
Rotational Gradient Processing, 15 deg
(Image details as above)
  

Comet 17P/Holmes - Montage of Images -  2007-10-25 to 2007-11-16

Image 

CCD Image Montage (30% size)
Images from 2007-10-25 to 2007-11-16
2x2 binning, various exposures
[Larger Image,  50% size]

  

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93P/Lovas - Comet

Comet 93P/Lovas (moving through starfield in Andromeda)
Estimated mag +14.9
Image
CCD Image, 
3 x 120 sec exposure (average combine), 2x2 binning, C Filter
2007-11-16  20:57h UT (#235197-99)
 
Animation showing motion of 93P/Lovas over 121 minutes
Image
CCD Image Animation (2 frames)
3 x 120 sec exposure (average combine), 
2x2 binning, C Filter, Linear Scale
2007-11-16  20:57 h UT (#235197-99)
2007-11-16  22:58h UT (#235292-94)

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50P/Arend - Comet

Comet 50P/Arend  (moving through starfield in Andromeda)
Image
CCD Image, 
3 x 120 sec exposure (average combine), 2x2 binning, C Filter
2007-11-16  21:09h UT (#235203-05)

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NGC 1058 - Spiral Galaxy

NGC 1058 (Perseus)

Image
2 x 180s exposure (average combine), 
2x2 binning, C Filter, Linear Scale
2007-11-16 21:29 hUT (#235222-23)
 

Earlier Image of NGC 1058 (Perseus) 
The bright star like object just to upper right of galaxy centre
is amalgamation of  light from a foreground star in our galaxy and 
supernova 2007gr in NGC 1058 galaxy.
The image does not have sufficient resolution to 
separate the two objects, though a slight elongation is noted.
(Rochester Supernova site | Discovery Image )

Image
4 x 120s exposure (average combine), 
2x2 binning, C Filter, Linear Scale
2007-08-22 22:55 hUT (#207096-99)

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UGC 12846 - Spiral Galaxy with Supernova 2007od

UGC 12846 with Supernova 2007od (Pegasus)
Galaxy UGC 12846 is very faint, but the supernova is very clear. 
(Note : stars slightly trailed)

2007od is a Type 2 Supernova 2007/11/02.85 by Crni Vrh Observatory at mag +13.9 (R)
(Rochester Supernova site | Discovery Image | )

Image below (2007-11-16.95) was taken 14.1 days after discovery. 
Measured magnitude of 2007od is +14.2 (C)

Image
Annotated CCD Image
3 x 180s exposure (average combine), 2x2 binning, C Filter,
2007-11-16 22:41 hUT (#235287-89)
 

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IC 1613 - irregular galaxy, local group

IC 1613 / Caldwell 51 (Cetus)
1 min exposure

Image

Annotated CCD Image Mosaic (3x3), 50% size
60sec, 2x2 binning, C Filter
2007-11-17 00:21hUT (#235353-61)

   

IC 1613 - detailed image 
21 min exposure
(location of image shown by rectangular box above)

Image

 CCD Image 
slight blur, contrast adjusted
7 x 3 min (average combine), 2x2 binning, C Filter
2007-11-17 00:03 hUT (#235346-52)

Image

 CCD Image - Normal View
(Image details as above)

 

Image

 CCD Image - negative
(Image details as above)

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 235  (2007-11-16)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site