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CCD Images - Session 297 (2008-08-25)

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Objects Session Notes
Bullet C/2007 W1 (Boattini) - Comet
Bullet EV Lac - (GJ 873) - Nearby Star (16.5 ly)
Bullet FG Sge - Variable Star
Bullet Astrometric & Photometric Monitoring
- SS Cyg (dwarf nova)
- U And, W And, U Her, SS Her (mira variable)
- RX And, Z And, R CrB, DY Per, TT Ari,  RU Peg, TZ Lyr, CY Lyr (variables)
- U Sge, V Sge, WZ Sge, FG Sge, EV Lac (variables)
- Barnards Star, 61 Cyg, EV Lac (GJ 873), HH And, Groombridge 34, Groombridge 1618, Teegardens Star, Van Maanen's Star (Nearby Stars)

- BL Lac attempt (failed link)

 

- First dark session of new season (5.8 hr) and first session for over one month due to holidays and cloudy skies. 
- Ambient Temperature 7 degC
- CCD operation of -15 degC 
(at 61% average cooling).  
- main objective was to acquire images of key selected stars for ongoing photometric and astrometric analysis. 
- opportunity take to acquire images of Mag 10 comet C/2007 W1 (Boattini) 
-  

 


C/2007 W1 (Boattini) - Comet

C/2007  W1 (Boattini) 
passing through starfield in Aries
Image
Annotated CCD Image 
3 x 120 sec exposure (average combine), 2x2 binning, C Filter
2008-08-26 01:47 UT (#297250-52)

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EV Lac (GJ 873) - Nearby Star (16.5 ly)

Improved baseline astrometric images of EV Lacerta (GJ 873, HIP 112460) were acquired, containing 82-85 astrometric reference stars

(Note : EV Lac is also a UV Cet flare star)

EV Lac / GJ 873 (Lacerta)
Image
Annotated CCD Image (75% size)
7 x 45 sec exposure (average combine), 1x1 binning, C Filter
2008-08-26 00:52 UT (#297206-12)

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FG Sge - Variable Star

Baseline images of FG Sge recorded in C, V, R filters.
It is noted that coordinates of FG Sge (catalog mag +9.4 to +13.6) appears to be close or coincident with those of the planetary nebula PLN 60- 7.1 (catalog mag ? +16.0)

FG Sge (Sagitta)
(FG Sge appeared as AAVSO's Variable Star of the Month for June 2008 (goto article)  
Image
Annotated CCD Image 
3 x 60 sec exposure (average combine), 2x2 binning, C Filter
2008-08-26 02:54 UT (#297312-14)
FG Sge - reference stars
Image
Annotated CCD Image 
60 sec exposure, 2x2 binning, V Filter
2008-08-26 02:46 UT (#297306)

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 297  (2008-08-25)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site