586 Proceedings of the Royal Irish Academy. 



XXXIV. — On the Okbit of the Binaet Stah 0. Stettte 234. By 

 J. E. Gore, F.E.A.S. 



Eead, February 8, 1886. 



The elements of the orbit of this binary star have not, as far as I 

 know, yet been published. The components are of magnitudes 7 and 

 7 '4, and it has always been a close and difficult object to measure 

 even with large telescopes. Some of the recorded observations are 

 very discordant, which renders the calculation of a satisfactory orbit 

 difficult and uncertain. 



By the method described in my Paper ^ on ^ Delphini I have com- 

 puted the following elements, which must of course be considered only 

 as a first approximation : — - 



Elements of 0. 2 234. 



F = 63-45 years. 

 7^=1881-15. 

 6 = 0-3629. 

 y = 47° 21'. 

 O - 124° 11' (1880-0). 

 A = 71° 58'. 

 a = 0"-339. 

 /^ = + 5°-67. 



The position of the star for 1880-0 is — 



R. A. 1P24"20^ 

 Decl. + 41° 58'. 



The following Table shows the comparison between the recorded 

 measures and the positions computed from the above elements : — 



1 Atite, p. 538. 



