[ 28 ] 
VI. 
OK THE DOUELE STAE, 45 GEMIKOEUM = 0^ 165. By J. E. 
GORE, E.R.A.S., Honorary Associate and Yice-President of the 
Liverpool Astronomical Society. 
[Eead December 12, 1887.] 
Assuming that the change of position in the components of this donble 
star is due to uniform rectilinear motion, I have computed the follow- 
ing formulae : — 
= 8-352 + 0-0093 (i5 - 1873-55)2, 
sec(87°-90 - 6) = 0-346p. 
The following is a comparison between the measures and the posi- 
tions computed from the above formulae : — 
Epoch. 
Observer. 
00. 
Sc. 
Oo - Be. 
Po- 
Po - Pc 
o 
c 
o 
ti 
II 
1847-22 
0. Struve, 
130-70 
129-0 
+ 1-7 
3-87 
3-84 
+ 0-03 
1856-74 
>) 
119-35 
117-1 
+ 2-25 
3-33 
3-31 
+ 0-02 
1870-24 
jj 
89-70 
94-1 
- 4-4 
2-89 
2-91 
- 0-02 
1878-030 
Burnham, 
76-5 
79-7 
- 3-2 
2-56 
2-92 
(- 0-36) 
1878-214 
79-7 
79-1 
+ 0-6 
2-34 
2-92 
(- 0-58) 
1886-96 
Hall, 
60-7 
63-8 
- 3-1 
3-18 
3-17 
+ 0-01 
1887-118 
5J 
60-8 
64-1 
- 3-3 
3-24 
3-17 
+ 007 
As the star is a difficult object to measure, even with large telescopes 
(magnitudes 5 and lO'T), the above comparison may be considered as 
fairly satisfactory. Eumham found that under the best conditions 
it was invisible with the 6-inch in 1875." The distance measures at 
the epochs 1878-03 and 1878-214 are evidently too small. 
