Struve 33 

Richard Harshaw
Star: Struve 33 (HD 2731; SAO 53949; ADS 421) 
Location of site: Northern Kansas City, Missouri (USA) 
94d 30m west longitude, 39d 15m north latitude 
980 ft above Mean Sea Level 
Date of observations (UT): 03:30, Oct 17, 2000 
Site classification: suburban 
Sky conditions: 
seeing-- 8 out of 10 
transparency-- 7 out of 10 
limiting visual magnitude-- 4.5 mag 
Telescope: Celestron C-8 
Eyepiece: 7.4mm (280x) 
 
 		 Sep/PA's:  2.7 + / 212 + 
Year of last measurement:  1997 
Distance (light years):  403 
Luminosity (in suns):  11 
Eyepiece and magnification: 7.4mm (280x) 
Colors noted:  W and W. 

This pair looks fainter than 9th magnitude to me. I'd say closer to 10.5. 
It was barely split at 104x. 
I'd rate it a 3. 
 
 
 
Thad Robosson
Star: Struve 33 
Date & Time: 21, October, 2000 
Seeing: 7-8 <1-10 Seeing Scale (10 best)>. 
Location of site: Phoenix, USA 
Site classification: Decidedly Urban 
Sky darkness: 4 <Limiting magnitude> 
Temperature: about 70ºF 
Telescope:  90mm ETX MakCas 
Magnification: 125x 
  
 		 Elongated with moments of split.  Est PA of 200°. Appears to be an equal pair. 

 
 
 
Bob Hogeveen
Star: Struve 33 
Date & Time: December 30, 2000  21.00->23.30 UTC+1  
Seeing: -- <1-10 Seeing Scale (10 best)>. 
Location of site: Annen, The Netherlands (53 N, 6 E) 
Site classification: Village-backyard  
Sky darkness: 4.5 <Limiting magnitude> 
Conditions: Now and then some clouds 
Temperature: -2ºC 
Telescope: Meade LX10 (8" SCT) 
Eyepieces: TV 40mm, Meade 25mm, TV 20mm, Vixen LV 7mm 
 		 Another fine pair. At 50x elongation and a hint of separation could be seen. At 100x the stars were nicely separated. 
I had the impression that A was a bit yellow and B a bit blueish. 
Rating : 2