m 
refraction. 
  
to the 
33 333) due 
model (1: 
  
y-parallaxes (in microns) in the 
4. 
3 
  
  
Y mm 
  
  
  
110 
120 + 
90 - 
60 
30 + 
N 
30 - 
-604 
-90- 
-120 - 
Diagram