Struve 1815
 
Florent Losse
Star: Struve 1815
Date & Time: May 23-24th, 2005
Seeing: 3-6/10
Transparency: poor, high altitude clouds
Location of site: St Pardon de Conques, France 4433N 0012W
Site classification: Rural
Conditions:
Sky darkness: m=5 between clouds
Moon:
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

 Companion not seen with the T115 at 45x. Measured 150°9  /  8"86
 

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Alessandro Bertoglio
Star: Struve 1815
Date & Time: 26 May 2005 21.04 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

Sky condition are finally batter, the small clouds are dissolving and the trasparence is sufficient, so I can use lower power. Easy nice pair fairly bright with balanced components pretty but not excessively distant. Both stars have the same colour, white with very slight blue hue. No visible rings. Extimated PA about 260 degrees. Couple well suited for small telescope

 


   

     

Steve Bodin
Star: Struve 1815
Date & Time: 27 May 2005, 10pm to midnight
Seeing: 4-5/10
Transparency: fair
Location of site: Silverdale Wa, USA, 47N,123W
Site classification: Suburb
Conditions: 60F, no wind, dry
Sky darkness: limiting mag 5.6
Moon:
Telescope: Celestron C8
Eyepieces: not used
Imaging: DX8263SL video camera at prime focus, f10
Magnification: app. 333x

 Another dim blue pair, but unequal in magnitude. Measured, 9.7 sec at
149.4 deg PA.
 

 
  
Louis Marchesi
Star: Struve 1815
Date & Time: 29 May 2005 3:41 UTC
Seeing: Pickering 3
Transparency: Below Average
Location of site: New London Township, PA, US (+39d45m,-75d52m)
Site classification: Suburban/Rural
Conditions: Clear, calm, heavy dew, 10C (50F)
Sky darkness: Not determined
Moon: None
Telescope: TMB152 f/7.9 Apochromatic Refractor
Mount: Losmandy G-11
Eyepieces: Baader Mark V Binocular Viewer with 1.25x Glaspath
Compensator
TMB Super Monocentrics 14mm
 Magnification:107x

 This was another rather nondescript pair of white stars. The pair was the only stars in the field, except for a tenth-magnitude star following.

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