Otto Struve 370

 
Bob Hogeveen
Star: Otto Struve 370
Date & Time: Sep 12, 2002
Seeing: 6 <1-10 Seeing Scale (10 best)>
Transparency: 7 <1-10, 10 best>
Location of site: Annen, The Netherlands, 53N, 6E 
Site classification: Village backyard 
Sky darkness: 5 <Limiting magnitude>
Moon: 40% Moon in Sco
Conditions: 
Telescope: Intes 6" f/12 MCT 
Eyepieces:: 40mm Pentax SMC XL, 20mm TV plossl
Magnification: 45x, 90x
Harshaw Scale: 2 <1-5; 1 best>
   		 Wonderful double with a deep-orange primary. B gives a bluish impression (especially @ 45x), but careful observation (@ 90x) shows a white star.

   
 
 
 
 
 
 

 

 
Steve Bodin
Star: Otto Struve 370
Date & Time: 13 Sep 2002
Seeing: 4 <1-10 Seeing Scale (10 best)>
Transparency: Fair
Location: Silverdale WA, USA
47N,123W
Site classification: Suburban
Sky darkness:  <Limiting magnitude>
Moon: First Qtr Moon
Telescope: 17 Inch DOB for imaging,
4 inch Meade SC visual
Imaging: PC164C Videocamera app. 300x
Magnification: 55x,100x visual		 This star has a very faint third component too. Visually, in the 4 inch, the primary may be slightly yellow and the secondary blue-white. The third star could not be seen. The WDS lists C at 78 deg PA from the primary and 128 deg from the secondary, but no separation given; I know, 2 angles and the included side and you can solve the separations from trig. These measures are from 1907 and no magnitude was given, it looks like 13 to me. Measurements: AB 20.32 sec at 15.1 deg PA, AC 23.46 sec at 80.2 deg PA, BC 23.53 sec at 131.5 deg PA.

 
 
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