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CCD Images - Session 334 (2008-12-16)

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Objects Session Notes
Bullet NGC 4301 - Spiral Galaxy
Bullet Astrometric & Photometric Monitoring
- U Gem  (dwarf nova)
- U Her (mira)
- BL Lac (blazar)
- R CrB,
DY Per, RR Tau (variables)
- Gliese 412 (nearby stars)

SS Cyg, HIP 36208  (failed due to cloud/poor transparency)
- Two parts to this session
A) evening session attempt (0.5 hrs), rapidly curtailed by poor sky transparency/developing cloud
B) early morning session on 2008-12-17 (2.0 hrs)
- Ambient Temperature (A) +3.5 degC,  (B) +0.5 degC (minimum), rising to +1.5 degC by end of session.
- CCD operation 
(A) -30/-29 degC (at 100% average cooling).  
(B) -30 degC (at 84% average cooling).  
- main objective of the session was  to acquire images of key selected stars for ongoing photometric and astrometric analysis. 
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NGC 4301 - Spiral Galaxy 

NGC 4301 (Virgo)
spiral galaxy 10 arc min from M61

Image

CCD Image - Linear scaling
3 x 180s sec exposure (average combine), 2x2 binning, C Filter
2008-12-17 06:32 h UT (#334064-66)

  [earlier images of M61 from 2008-11-30]

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 334  (2008-12-16)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site