Burnham: Measures of Proper Motion Stars 
The only direct measures are: 
1891.27 89?37 io 8"67 211 En< 
1908.00 94-54 in.21 3n |3 
From these positions the apparent motion of B is: 
o"6ii in 167?6 
The only prior measure of the third and fainter star is: 
1879.30 124°1 188"59 in p 
This gives nearly the same proper motion as the other star, 
but as it depends on a single night, the other result is to be 
preferred. 
From meridian observations the proper motion is: 
Auwers 
o'.To3 
in 86? 1 
Newcomb 
0.121 
in 87.5 
10 Virginis (6.2... 
13 - 5 ) 
Boss 
0. no 
in 88.4 
R. A.I2 h 3 m 
32 s Decl. + 2 0 34' 
1909.342 
ioi?88 
39 "oi 
16 Virgi 
nis (5.0. 
• -II- 5 ) 
10.244 
100.80 
39-76 
10-337 
100.57 
39.66 
R. A. I2 h 14™ 
15 s Decl. + 3° 59' 
1909.97 
101.08 
39-48 
1909.266 
2*78 
I 30?34 
No other measures of the small star. 
The proper motion of 
.302 
2.69 
130.39 
the other is given: 
• 304 
2.49 
130.23 
Auwers 
o"i 87 in 
176*3 
1909.29 
2.65 
130.32 
Porter 
0.174 in 
172.6 
No other measures. The proper motion is given: 
A. G. Alb. 0.182 in 
174.8 
A. G. Alb. 
0"322 
in 258?4 
• 
Porter 
0.315 
in 257.2 
Auwers 
0.325 
in 258.8 
Lalande 22954 (6.0. 
. .12.8) 
Boss (G. C.) 
0.307 
in 252.3 
R. A. i2 h 9 m 
o s Decl. 
— 9 ° 37 ' 
1909.340 
I 4 S? 8 5 
8 9 "30 
SD (12°) 3614 (5. 
0.. .13.1) 
• 342 
149-05 
89.44 
R. A. I2 h I4 m 
44 s Decl. — 12 0 54' 
.378 
149-15 
89.56 
1909.304 
3 i 2?77 
48"47 
I 909-35 
149.02 
89-43 
• 342 
312.92 
48.86 
No other measures. The proper motion of the 
large star 
.378 
3 I 3 - 2 I 
48.43 
from meridian positions is 
1909.34 
312.97 
48.59 
Porter 
o"9So in 
177-2 
From meridian observations this star has no sensible proper 
Paris 
1.007 in 
180.0 
motion: 
Boss o"oo2 in 
323 °8 
8 U rsae Maj (3 . 5 .. 
.10.2) 
R. A. I2 h 9 m 30 s Decl. + 57 0 42' 
7 Can. Ven. (6.5 
..10.7) 
A and B 
R. A. 12 11 24 m 
22 s Decl. + 52 0 12' 
I 907 -I 97 
73-30 
190"06 
A and B 
.217 
73-30 
190.06 
1908.249 
172^05 
io8?79 
.258 
73-30 
190.30 
.266 
171.83 
109.23 
1907.22 
73-30 
190.14 
• 370 
172.23 
109.51 
A and C (11.7) 
1908.29 
172.04 
109.18 
1907.217 
i24?6o 
i86"S5 
A and C (8.7) 
.258 
124.80 
186.19 
T908.230 
326?oo 
232^21 
1907.23 
124.70 
186.37 
.249 
326.65 
231-58 
.266 
326.22 
231.55 
For AB we have the following measures: 
1908.25 
326.29 
231.78 
1878.20 73°18 
I 92"37 
3 » 
Ball 
1886.46 73.33 
192.02 
2n 
Eng 
There are no other direct measures 
of these stars. C is DM 
1894.50 73.17 
191.49 
2n 
Eng 
(52°) 1630 (= Groombridge 1896). 
Taking the relative posi- 
1907.22 73.30 
190.14 
3 n 
P 
tions as given from meridian observations in Groombridge, 
These positions give for the most probable proper motion of 
6 Ursae: 
o"oSo in 68 ?6 
O. Arg. N., A. G. Harvard, and Greenwich 10-year catalogues, 
with the present measures, we have for the proper motion of 
the large star: 
o"304 in 273 ?8 
4i 
