Struve 1823

Steve Bodin
Star: Struve 1823
Date & Time: 25 May 2005, 10pm to midnight
Seeing: 3/10
Transparency: fair
Location of site: Silverdale Wa, USA, 47N,123W
Site classification: Suburb
Conditions: 55F, no wind, dry
Sky darkness: limiting mag 5.6
Telescope: Celestron C8
Eyepieces: not used
Imaging: DX8263SL video camera at prime focus, f10, and 2x
Magnification: app. 333x and 666x

 Triple, but the D component is very faint. Primary is rather close for
prime focus, but split. Actually, the primary is a very close 0.2 sec pair,
so this is the C star. Measurement, AB-C, 3.8 sec at 143 deg PA, AB-D, 71
sec at 252 deg PA again quite different from the 1913 measure.
 

    
 
   

Florent Losse
Star: Struve 1823
Date & Time: May 27-28th, 2005
Seeing: 6/10
Transparency: Good, thin clouds running
Location of site: St Pardon de Conques, France 4433N 0012W
Site classification: Rural
Conditions:
Sky darkness: m=6
Telescope:
- visual : T115, guidescope suited with a 20mm eyepiece (G=45x)
- imaging : homemade Newt T200, Barlow 3x, Audine K400 (sampling 0"43/px)
Reductions: done with a future release of Reduc.
Eyepieces: 20mm
 Magnification: 45x

 Orientation clearly seen without hesitation, very elongated. Far more easy than stf1818. Measures say :146°9 / 3"79
 


Alessandro Bertoglio
Star: Struve 1823
Date & Time: 27 May 2005 21.56 UTC
Seeing: IV Antoniadi
Transparency:
Location of site: Turin, Italy, 4504N 0742E
Site classification: Urban area with strong light pollution
Conditions: clear, no wind, mild temperature, little hazy
Moon: none
Sky darkness: 2.5-3 (limiting magnitude)
Telescope: Takahashi Mewlon 300, Dall-Kirkham 300/3572 reflector
Mount: 10 Micron GM2000 with FS2 controller
Eyepieces: Televue Plossl 8 mm.
Magnification: 447X
Diagonal: Yes, Televue 2" Everbrite

Triple star not easy as the third component is very faint (for this reason I'm using this high power). The primary and the secondary stars are pretty close and unbalanced. The primary is sufficiently bright and its colour is whitish. The secondary is still visible but faint (no colour detectable). The third star is rather more distant, very faint and detectable only with averted vision. No visible rings. Extimated PA: A-B about 160-165 degrees, A-C about 250 degrees (it's possible the third star moved as my extimated PA is fairly different from the PA on the table). Not particularly interesting. It needs better skies.
 

 

         
 
Morgan Spangle
Star: Struve 1823
Date & Time: May 29-30, 2005
Seeing: 4/5
Transparency: 2/5
Location of site: Larchmont, NY
40 55N 73 44W
Site classification:
Conditions: steady, calm, high haze, passing clouds
Sky darkness:
Telescope: Borg 101ED fl: 640mm
CCD Camera: ST237A, 2.39 pixels/arcsec
FOV 25 x 19'
Eyepieces:
Magnification:

 AB-D  65.6" -  249.4 DEG (NEEDS CHECKING)
 

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