Burnham: Measures of Proper Motion Stars 
A and C (11.5) 
1907.197 
•233 
97-2 
97.2 
237"12 
236.85 
1907.21 
97.2 
236.98 
B and C 
1907.197 
i8o!8 
59 '' 8 o 
.214 
180.2 
60.31 
.233 
180.5 
60.37 
1907.21 
180.5 
60.16 
We have the following measures of AB: 
1852.40 
8 i °53 
248'.'oo 
2n 
02 
1870.46 
81.82 
244.71 
in 
02 
1881.30 
81.92 
244.00 
in 
02 
1907.21 
82.45 
237.12 
2n 
P 
22 Librae (6.5...13.1) 
R. A. is” o m 
7 s Decl. — 
16 0 i' 
1909.378 
275°5 
io "99 
.381 
275-1 
11.27 
• 458 
274-5 
11.07 
1909.41 
275.0 
11.11 
This star has a faint companion not heretofore seen. There 
is another 13 m star, 234?4:35"7. 
The proper motion of 22 Librae is: 
Auwers o"ii3 in 264?o 
Boss 0.069 in 249.7 
These positions give for the apparent movement of A: 
o"2o8 in 62?3 
The measures of BC are: 
1853-42 
i 8 i!i 5 
57"65 
in 
02 
1870.46 
180.38 
58.53 
in 
02 
1881.30 
181.17 
59-15 
in 
02 
1907.21 
180.50 
60.16 
3 n 
P 
: of these 
stars has a 
small proper motion: 
o"o52 in 
3 4 8?6 (± 180 0 ) 
Assuming that this is in B, and applying the correction to the j 
observed movement of A, we have for the real proper motion 
of that star: 
Measures 
o" 228 in 
49 ? 7 
Auwers 
0.225 in 
53-8 
N ewcomb 
0.231 in 
57-5 
Boss 
0.227 in 
58.2 
Ursae Min (2.3... II. 5) 
R. A. I 4 h 5 i m 
6 s Decl. + 
74 ° 39 ' 
1908.060 
342°25 
209"10 
• 159 
342.25 
209.14 
.266 
34 I .98 
209.19 
1908.16 
342.16 
209.14 
The only other measure 
is: 
1879-30 342°8 
207"82 
in 
P 3 
As the first position depends upon a single night, the result¬ 
ing motion cannot be considered as very certain. A continua¬ 
tion of the measures after a proper interval of time will 
give a reliable result. From the two positions we have: 
o'.'o92 in 282? 2 
The values 
from meridian 
observations 
are discordant and 
doubtful. 
Auwers 
o ?034 
in 
2 66?6 
Groombridge 
0.018 
in 
279-3 
Newcomb 
0.004 
in 
3 i 7 .1 
Boss 
0.030 
in 
279.6 
45 Bootis (5.2.. .11.0) 
R. A. i5 h 2 m 2 s Decl. + 25 0 20' 
A and B 
1907.329 
53 ?i 5 
io 7"28 
• 331 
52.65 
107.15 
•351 
53 -18 
107.19 
1907.34 
52.99 
107.21 
A and C (9.5) 
1907.329 
44?33 
2 4 6 ? 5 i 
• 331 
44-32 
246.39 
• 351 
44-32 
246.60 
1907.34 
44-32 
246.50 
B and C 
I 907 . 35 I 
37? 28 
141'.'68 
C is DM (25 0 ) 2874, and is known to have a large proper 
motion, given by Porter: 
°-'933 
in 30i?o 
The measures 
of AB are: 
1888.53 
55?32 
108'.'19 
411 
Eng 
1907.34 
52.99 
107.21 
3 n 
P 
From these measures the proper motion of 45 Bootis is: 
Measures 
o"239 in 
I 3 I ?5 
Auwers 
0.248 in 
140.5 
N ewcomb 
0.261 in 
I 35 -I 
Boss 
0.262 in 
134-3 
The measured positions of 
AC are: 
1887.49 
49 ? 77 
252^29 
in 
Eng 
1889.56 
49.27 
251.46 
3 n 
Eng 
1907.34 
44-27 
246.50 
3 n 
P 
Rejecting the 
single observation, the apparent 
motion of 
is: 
i ?255 
in 303?9 
Correcting this for the proper motion of A as shown by the 
measures of AB, we have for the real proper motion of C: 
1"018 in 302!1 
46 
