Struve 291

Steve Bodin
Star: Struve 291
Date & Time: 27 October 2005, midnight to 1 am local
Seeing: 3/10
Transparency: good
Location of site: Mattawa WA, USA 46N 119W
Site classification: rural
Conditions: temp 40F, no wind
Sky darkness: limiting mag 6.5
Telescope: Meade 16 LX200GPS
Eyepieces: not used
Imaging: DX8263SL video camera at prime focus
Magnification: app. 600x

 Nice close primary pair, like two headlights on a country road. Third star faint and wide. Measurements, AB 3.4 sec at 117.6 deg PA, AC 65.26 sec at 242.4 deg PA.
 


 

 
  

Florent Losse
Star: Struve 291
Date & Time: Nov 05-06/06-07th, 2005
Time:
Seeing: 7 out of 10
Transparency:  out of 10
Location of site: 4433N 0012W 
Site classification: Rural
Conditions:
Sky darkness: limiting mag = maybe 2/3 at very best, <0 at worst !
Telescope:
- visual : 120mm refractor used as guidescope 
- imaging : homemade Newton 8", Barlow 3x with tube extender, Audine K400 (sampling 0"32/px) 
Eyepieces: 20mm,7.5mm 
Reductions: Reduc V3.49

I don't really know how many times it took to find it. I
reported in my road-book several ten seconds to see it clearly in the 120mm guidescope. Measurement : 117°4 / 3"06
 

      
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