Burnham: Measures of Proper Motion Stars 
The several 
mean results are as follows: 
1892.23 
242! 1 
9i"47 
Wolf 
1907-03 
252.10 
81.54 
4 n 
P 
1908.15 
253.10 
80.88 
4n 
P 
1909.12 
253.81 
80.25 
4 n 
P 
1910.10 
254.55 
79.92 
3 n 
P 
1911.07 
255-33 
79.o6 
3 n 
P 
The proper motion of A from all these 
measures 
is: 
1 "2; 
>8 in 190^4 
Further measures will reduce the error in this value. 
To make it certain that B has no proper motion, I have con 
nected it with 
a 12 m star: 
B and C 
1906.906 
275°9 
155"17 
7.102 
275-5 
154.48 
7.120 
275-7 
154-17 
1908.118 
275.90 
154.90 
.159 
275-85 
154-70 
.192 
275.67 
154-50 
It is obvious that B has 
no sensible proper motion : 
1892.23 
275 °9 
I54"94 
Wolf 
1907.04 
275.7 
154-61 
3 n 
P 
1908.15 
275-8 
154-70 
3 n 
P 
61 Ursae Maj (6.3.. 
.11.2) 
R. A. n h 34 m 
44 s Decl. + 34 0 53' 
1907.271 
100?55 
159*39 
• 331 
100.58 
159.17 
1907-30 
100.56 
159.28 
We have the following measures : 
1850.30 108?12 
i 63"33 
in 
02 
1855.25 107.60 
162.85 
in 
02 
1884.29 103.57 
160.91 
3 n 
H2 
1907.30 100.56 
159-28 
2n 
P 
The correction to the proper motion 
is small: 
Measures 
o" 384 in 
i 84 ?o 
Auwers 
0.380 in 
182.8 
Boss 
0.391 in 
181.3 
62 Ursae Maj (6.0. 
..9.2) 
R. A. n h 35 m 
20 8 Decl. 
+ 32° 25' 
1907.197 
299°65 
84*29 
.217 
299.54 
&4-50 
.258 
299.53 
84.33 
1907.22 
299-57 
84-37 
The small 
star is DM (32°) 2178. 
The measures are as 
follows: 
1850.30 
297?20 
io5"76 
in 
02 
1852.27 
297-17 
105.07 
in 
02 
1855-25 
297.45 
103.99 
in 
02 
1884.27 
298.52 
93.38 
2n 
H2 
1888.33 
298.90 
91-59 
2n 
Eng 
1907.22 
299-57 
84-37 
3 n 
P 
Therefore the corrected 
proper motion of the large star 
Measures 
o"38l in 
287^5 
Auwers 
0.359 in 
274-3 
Porter 
0.365 in 
273-6 
Boss 
0.347 in 
271.8 
P Virginis (4.0... 10.8) 
R. A. n h 44 m 
25 s Decl. + 2 0 26' 
1908.156 
284?75 
245"60 
.192 
284.17 
245.28 
.214 
284.33 
245.80 
1908.19 
284.42 
245-56 
The following are the direct measures: 
1850.31 283?40 
200''67 
in 
02 
1855.25 283.45 
205.19 
in 
02 
1884.30 283.85 
229.14 
2n 
H2 
1908.19 284.42 
245-56 
3 n 
P 
The proper motion of (5 Virginis from these positions is: 
o"792 in io8!8 
From meridian observations this is given: 
Auwers 
0.765 
in 
109.9 
Newcomb 
0.789 
in 
no.4 
Boss 
0.792 
in 
no.6 
02 also compared |3 with a 9 m star nf. The distance is too 
great for the micrometer, and I have therefore measured only 
the differences in declination. 
1908.20 A Decl. = 5U76 2n 
Comparing this with the four measures of 02 (1852-1884) 
gives substantially the same value for the proper motion in 
declination as that from the other star. 
From A B Decl. — o"252 
From AC 0.256 
Lalande 22662 and 22667 
R. A. n h 57 m 49 s Decl.+ 4 0 2' 
A and B (8.8...9.0) 
1907.997 94°7o in''21 
8.000 94-42 hi .11 
8.022 94-50 hi .30 
1908.00 94-54 hi. 21 
Both stars are found in several star catalogues, and each has 
| some proper motion. Unfortunately there is no other star 
near enough to either to be measured with the micrometer. 
The proper motions are: 
Lalande 22662 
Porter 
0" 145 
in 
295?2 
Kustner 0.125 
in 
284.8 
Paris 
0.150 
in 
270.0 
Lalande 22667 
Porter 
o " 5 o8 
in 
I72?4 
Kustner 0.544 
in 
174-2 
Paris 
0-539 
in 
173-1 
40 
