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CCD Images - Session 258 (2008-01-25)

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Images (S259)
 
Objects Session Notes
Bullet RX And - Z Camelopardalis-type dwarf nova
Bullet 17P/Holmes - Comet
Bullet Astrometric & Photometric Monitoring
- SS Cyg, U Gem (dwarf nova)
- S Cyg, U And, W And (mira variables)
- BL Lac (Blazar)
- TT Ari, RX And, Z And, U Mon, DY Per, RR Tau (variables)
- HH And, 61 Cyg (Nearby stars)



- Evening session (4.0hr), generally poor transparency with conditions deteriorating and cloud developing towards end.  Relatively mild, 10 degC warmer than session 256.
- CCD operation of -20 degC (at 80% average cooling). 
- main objective was to acquire images of certain selected stars for ongoing photometric and astrometric analysis, in particular SS Cyg and RX And. 

RX And - Z Camelopardalis-type dwarf nova

RX And  (Andromeda)
Distinct fading of RX And noted in photometric measurements
 on 2008-01-20 to 2008-01-25
Image
 

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17P/Holmes - Comet

Comet 17P/Holmes  - passing through starfield in Perseus
Central Coma (Jan 2008)
 much faded

Image 
CCD Image 
3  x 120s exposure (av. combine), 2x2 binning, C Filter
2008-01-25 18:55h UT (#258042-44)

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 258  (2008-01-25)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site