Burnham: Measures of Proper Motion Stars 
1909.186 
.227 
A and C 
35-25 
35-05 
163 "97 
163.58 
1909.21 
35.15 
163.77 
B 
and C (12.7) 
1909.186 
37 ° 13 
161H3 
.227 
36.90 
161.08 
.266 
37-35 
161.10 
1909.23 
37.13 
161.10 
The former measures of BC have too large a difference in 
distance to use the mean: 
1880.31 37?23 
160"16 
in 
B 1 
1880.75 37-32 
161.24 
in 
Bl. 
8630. (3 642. (9.0.. 
.11.0) 
R. A. i8 h 26 m 
45 s Decl. - 
— io° 32' 
1911.449 
88?8 
3"79 
• 509 
90.2 
3.80 
.526 
89.8 
4.00 
1911.49 
89.6 
3-86 
One of the brighter stars in h 3751. 
8636. 02 
355 rej. (6.: 
2...9.5) 
R. A. 18" 2 7 m 
1 38 s Decl. 
+ 8° ii' 
1912.564 
CO 
M 
0 • 
CO 
Tf- 
N 
38"55 
.581 
248.65 
38.26 
.583 
248.45 
38.38 
1912.57 
248.46 
38.40 
There is no certain change in the place of the companion 
since 1866. 
8643. 22340.(8.3.. 
.9.2) 
R. A.i8 h 28 m 
30 9 Decl.+ 3I°30' 
B and C (9.4) 
1909.186 
I 55° I 5 
2o6"73 
.227 
155-iS 
206.64 
.266 
155-05 
206.65 
1909.23 
155.13 
206.67 
The previous position is : 
1880.53 I55°47 
2o6'.'74 
2n 
Bl. 
The measures tend to show that the proper motion is in A, 
the larger of the two small stars. The 
measures 
of AB make 
the annual motion o"o22 on the line joining the stars. 
8644. H 1329. (8.9... 13.6) 
R. A. i8 h 28 m 32’ Decl. + 11 0 17' 
8646. 0 
2 (App.) 171. 
(6.6...7.4) 
R. A.i8 h 
28™ 50 s Decl. + 38° 45' 
A and B 
1911.162 
321 °30 
I 43 " 2 i 
. 164 
321.20 
143.ii 
.200 
321.35 
143.73 
1911.18 
321.28 
143-35 
The four positions by A, Fr and (3 give for the apparent 
motion of A: 
o'.'i50 in 2i5?7 
To show whether or not there is any motion in B, I have 
connected a faint star : 
A and a (10.7) 
T911.162 i38?6o 8 s"90 
.200 138.68 85.95 
1911.18 138.64 85.92 
The proper motions from the Paris catalogue are: 
A o"o82 in i54?6 
B 0.150 in 90.0 
8650. 
02 356 rej. (7. 
°o 
6 
R. A. 18" 
1 29"’ 20 s Decl. 
+ 40° 4' 
A and B 
1910.280 
305?45 
34 "96 
•299 
305.88 
35-33 
• 375 
305-75 
35-44 
1910.32 
305.69 
35.24 
A and C (9.5) 
1910.280 
4 ° 8 5 
52"o6 
•299 
4-38 
51+7 
•375 
4-53 
51-88 
1910.32 
4-59 
51-87 
B and C 
1910.280 
46? 77 
45 "52 
•299 
46.38 
45.22 
• 375 
46.48 
45-33 
1910.32 
46.54 
45-36 
As there is no change in BC since 1866, it is obvious the 
motion is in the principal star. From the measures of A and (3 
the proper motion of A is: 
AB R. A. — o"o5o Decl. + o"o5i 
AC 0.038 0.041 
— 0.044 +0.046 
1910.299 
3i6°8 
15 "80 
■395 
317-7 
15.96 
1910.35 
317.2 
15.88 
No other measures. H’s angle is 328°. 
Therefore the proper motion of A is: 
o"o 63 in 3i6?2 
AC and BC are transposed in Part II of the General Cala 
logue; and so in A, Hu, and others. 
231 
