MILLER— PARALLAXES OF FIFTY STARS. 



87 



No. I. B.D. — 4°.62. Ho. 212 = 13 Ceti. (o'^ si'".!; — 4° 9'.) 

 Mag. 5.24. /*^o''.0272; — o".oi8. Spectrum F. 



Ho. 212 is a triple star, the measures below refer to the close 

 pair A B, which is a binary system with a period of 6.88 years. The 

 combined image of the pair is sensibly round, and in the measures 

 this image was bisected. It was measured in right ascension. Rus- 

 sell found for this star a hypothetical parallax of + o".039. The 

 brighter image, A, has been found to be a spectroscopic binary. 



Solution : c ^ + o".296. 



/A= + 0".I2I ± o".002. 



TT = + o".048 ± o",oio. 

 p. e. unit weight, ± o" .oig. 



Comparison Stars. 



No. 

 2 



4 



7 



10 



12 



TT 



X. 



+ 138.3 

 263.4 



— 7I.I 



149-7 



271.0 



0.0 



Y. 

 — 97-7 



51-9 

 +181.0 



61.5 



108.3 



0.0 



Dependence. 

 +0.326 



.197 

 .019 



•234 

 .224 



Diameter. 



0.47 

 0.40 



0.45 

 0.37 

 0.50 

 0.67 



B. D. No. 



—4° .62 



