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CCD Images - Session 243 (2007-12-18)

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Objects Session Notes
Bullet M31 - Extragalactic Nova : M31 2007 11d
Bullet 17P/Holmes - Comet
Bullet IC 418 - Planetary Nebula (Raspberry Nebula)
Bullet UGC 4881 - Spiral Galaxy with Companion (ARP 55)
Bullet 8P/Tuttle - Comet
Bullet Astrometric & Photometric Monitoring
 - SS Cyg, U Gem (dwarf nova)
- BL Lac (Blazar)
- U And  (mira variables)
- CY Lyr, TZ Lyr, TT Ari, RX And , Z And (variables)
- RU Peg, DY Per (variables)
- HH And, 61 Cyg, Gliese 725, Gliese 1245, Groombridge 34, Groombridge 1618, Groombridge 1830, Lalande 21185, Teegarden's Star (Nearby Stars)
- Evening session (6.7hr). 
- Main objectives were to acquire images of certain selected stars of ongoing photometric and astrometric analysis, and take images of comet 8P/Tuttle
- CCD operation of -25 degC (at 64% average cooling). 
- opportunity was also taken to acquire gallery images of certain deep sky objects, and a mosaic of comet 17P/Holmes (now faded) to compare with earlier mosaic images.
-

M31 - Extragalactic Nova : M31 2007 11d

 

M31 part (Andromeda)
An extragalactic nova (M31 2007 11d) was discovered in M31 on 2007/11/16.51 
by Koichi Nishiyama and Fujio Kabashima, an reached an apparent magnitude of +14.9 
(Extragalactic Novae page at Rochester Supernova site | Discovery Image | )

Image below (2007-12-18.82) was taken 33 days after discovery.
No sign of any object is evident at discovery location (shown by white circle in enlarged image)
Limiting magnitude of image +17.3

Image
CCD Image 
5 x 2 min exposure (average combine), 2x2 binning, C Filter
2006-12-18 19:45h UT (#243034-38)
  
Image  
CCD Image (250% size, cropped)
Image details as above
  

Globular Clusters in M31 (Andromeda)
5 globular clusters visible in image marked by white markers

Image

Annotated CCD Image 
(images details as above)

  

M31 - detail

Image

CCD Image - enhanced to show detail
(images details as above)

 

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17P/Holmes - Comet  

Comet 17P/Holmes  - passing through starfield in Perseus,  2007-12-18
Image
CCD Image Mosaic (6 x 7), 35% size
30s exposure, 2x2 binning, C Filter,  Linear Scale
2007-12-18 21:55h UT (#243138-85)

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IC 418 - Planetary Nebula (Raspberry Nebula)

IC 418 (Lepus)

Image

Annotated CCD Image 
(50% size, insert 250% size)
3 x 30 sec (average combine), 1x1 binning, C Filter
2007-12-18 23:18hUT (#243230-32)

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UGC 4881 - Spiral Galaxy with Companion (ARP 55)

UGC 4881 / ARP 55 (Lynx)

Image

Annotated CCD Image 
5 x 180 sec (average combine), 2x2 binning, C Filter
2007-12-18 23:30hUT (#243236-40)

 

UGC 4881 / ARP 55 - detail

Image

CCD Image (250% size)
Image details as above

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8P/Tuttle - Comet  

Comet 8P/Tuttle  - passing by the +6 Mag star 
 13 Cassiopeiae (Cassiopeia)

Image
CCD Image 
5 x 30s exposure (average combine), 2x2 binning, C Filter
2007-12-19 01:33h UT (#243346-50)

  

Comet 8P/Tuttle - colour image
Image
Approximate Colour CCD Image  (CBVR)
Luminance : av 3x 30s (C),
Red : av 3 x 30s (R), Green : av 3 x 30s (V), Blue : av 5 x 60s (B)
2007-12-19 01:21h UT (#243330-42)

   

Comet 8P/Tuttle 
Image
CCD Image 
60s exposure , 2x2 binning, C Filter
2007-12-19 01:14h UT (#243329)

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 243  (2007-12-18)
Last Updated : 2021-01-07
Site Owner : David Richards
Home Page : David's Astronomy Web Site