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CCD Images - Session 239 (2007-12-05)

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Objects Session Notes
Bullet UGC 12846 - Spiral Galaxy with Supernova 2007od
Bullet 17P/Holmes - Comet
Bullet NGC 7635 - "Bubble Nebula"
Bullet Sharpless 2-155 - Emission Nebula, "Cave Nebula"
Bullet Dwarf Planet, 1 Ceres
Bullet M46 - Open Cluster
Bullet M47 - Open Cluster
Bullet NGC 2438 - Planetary Nebula
Bullet Astrometric & Photometric Monitoring
 - SS Cyg (dwarf nova)
- BL Lac (Blazar)
- S Cyg (mira variable)
- Z And, TT Ari (variables)
- Evening session (4.6hr), operated under automated control for majority of session.
CCD operation of -25 degC (at 74% 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.

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 (2007-12-05.97) was taken 33 days after discovery. 
Measured magnitude of 2007od is +14.4 (C)
Image
Annotated CCD Image
3 x 180s exposure (average combine), 2x2 binning, C Filter,
2007-12-05 23:12 hUT (#239059-61)
 

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17P/Holmes - Comet  

Comet 17P/Holmes  - passing through starfield in Perseus,  2007-12-05

Image
CCD Image Mosaic (6 x 9), 25% size
30s exposure, 2x2 binning, C Filter,  Linear Scale
2007-12-05 23:39h UT (#239062-115)

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NGC 7635 - "Bubble Nebula"

NGC 7635 (Cassiopeia)

Image

CCD Image Mosaic
120 sec, 1x1 binning, C Filter
2007-12-06 22:44hUT (#239163-68)

 

NGC 7635 - detail

Image

CCD Image
5 x 180 sec (average combine), 2x2 binning, C Filter
2007-12-06 00:24hUT (#240064)

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Sharpless 2-155 - Emission Nebula, "Cave Nebula"

Sharpless 2-155 / Caldwell 9 (Cepheus)

Image

CCD Image Mosaic
60 sec, 2x2 binning, C Filter
2007-12-06 01:07hUT (#239145-56)
8" LX200 Classic + ST-7E
[ Full Size ]

 

Sharpless 2-155 - detail

Image

CCD Image
3 x 180 sec (average combine), 2x2 binning, R Filter
2007-12-06 00:45hUT (#239142-44)

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Dwarf Planet,  1 Ceres

Dwarf Planet  - 1 Ceres (moving through starfield in Cetus)
Image
Annotated CCD Image, 
3 x 20 sec exposure (average combine), 2x2 binning, C Filter
2007-12-06  01:38h UT (#239172-74)
  
Animation showing motion of 1 Ceres over 85 minutes
Image
CCD Image Animation (2 frames)
3 x 20 sec exposure (average combine), 
2x2 binning, C Filter, Linear Scale
2007-12-06  00:13h UT (#239125-27)
2007-12-06  01:38h UT (#239172-74)

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M46 - Open Cluster 

M46 (Puppis)
Image
CCD Image Mosaic (75% size /  cropped)
30s exposure, 2x2 binning, C Filter, Linear Scale
2007-12-06 02:27 hUT (#239206-17)
[ Full Size ] 
 

M46 - detail of cluster centre, showing planetary nebula NGC 2438 (see below)
Image
CCD Image 
3 x 60s exposure (average combine), 
2x2 binning, C Filter, Linear Scale
2007-12-06 02:04 hUT (#239197-99)

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NGC 2438  - Planetary Nebula (Calabash Nebula / Rotten Egg Nebula)

NGC 2438 (Perseus)
(sits in M46)
Image
CCD Image
2 x 60s exposure (average combine), 
2x2 binning, C Filter, Linear Scale
2007-12-06 21:29 hUT (#239203-05)
 

NGC 2438 - detail
Image
Annotated CCD Image (250% size)
Image details as above

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NGC 2438  - Planetary Nebula

NGC 2438 (Perseus)
(sits in M46)
Image
CCD Image
2 x 60s exposure (average combine), 
2x2 binning, C Filter, Linear Scale
2007-12-06 21:29 hUT (#239203-05)
 

NGC 2438 - detail
Image
Annotated CCD Image (250% size)
Image details as above
 

Calabash Nebula / Rotten Egg Nebula 
Lying close east of NGC 2438 is a small faint nebula 
known as the Calabash Nebula, whose position is marked by 
a white circle in the image below
(The Calabash Nebula is a name which is sometimes 
mistakenly associated with NGC 2438, but they are different objects)
Image
Annotated CCD Image
Image details as above
[ Calabash Nebula - Information ]

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M47 - Open Cluster 

M47 (Puppis)
Image
CCD Image Mosaic (60% size)
30s exposure, 2x2 binning, C Filter, Linear Scale
2007-12-06 02:32 hUT (#239218-29)
[ Full Size ] 
 

M47 - detail of cluster centre
Image
CCD Image 
3 x 60s exposure (average combine), 
2x2 binning, C Filter, Linear Scale
2007-12-06 01:58 hUT (#239191-93)

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 239  (2007-12-05)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site