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CCD Images - Session 278 (2008-03-30)

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Objects Session Notes
Bullet C/2008 C1 (Chen-Gao) - Comet
Bullet NGC 4490 - Spiral Galaxy with Supernovae 2008ax
Bullet Astrometric & Photometric Monitoring
- U Gem (dwarf nova)
- W And, U Her (mira variable)
- RX And, Z And, KR Aur, SY Cnc, DY Per, RR Tau, SU Tau (variables)

 

- Evening Session (3.1hr)
- CCD operation of -15 degC 
(at 49% average cooling). 
- main objective was to acquire images of certain selected stars for ongoing astrometric analysis

C/2008 C1 (Chen-Gao) - Comet

Comet C/2008 C1 (Chen-Gao)
passing through starfield in Auriga

Image
CCD Image
5 x 60s exposure (average combine), 2x2 binning, C Filter 
2008-03-30 21:21hUT (#278067-71)
 
Comet C/2008 C1 (Chen-Gao) - detail

Image 

CCD Image 
5 x 60s exposure (average combine, aligned on comet),
Image details as above
  

Pair of images illustrating motion of C/2008 A1 (Chen-Gao)
over a period of one hour.

 Image
CCD Images
5 x 180s exposure (average combine), 2x2 binning, C Filter
Top: 2008-03-30 21:21hUT (#278067-71)
Bottom: 2008-03-30 21:23hUT (#278113-17)

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NGC 4490 - Spiral Galaxy & Supernovae 2008ax

NGC 4490 with SN 2008ax (Canes Venatici)
2008ax (Type II) was discovered 2008/03/03.45 by LOSS; Koichi Itagaki
Magnitude at discovery +16.1 (C)
(Rochester Supernova site | LOSS Discovery Image
 | Itagaki Discovery Image | Reference Image)

Image below (2008-03-30.94) was taken 27.5 days after discovery.
SN 2008ax - Estimated Magnitude +12.4 (C)

Image
Annotated CCD Image
7 x 120s exposure (average combine), 2x2 binning, C Filter 
2008-03-30 22:36 hUT (#278120-26)
  

Earlier Image of NGC 4490 & SN 2008ax
[ 2008-03-08.03, Estimated Magnitude +15.2 (C) ]

 Image
Annotated CCD Image
7 x 120s exposure (average combine), 2x2 binning, C Filter 
2008-03-08 00:48 hUT (#273136-42)

 

Earlier Image of NGC 4490 (Pre-SN)

 Image
CCD Image
5 x 180s exposure (average combine), 2x2 binning, C Filter
2006-12-20 06:30h UT (#167511-15)

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 278  (2008-03-30)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site