Burnham: Measures of Proper Motion Stars 
a Persei 
(2.2.. 
.12.2) 
DM (62°.) 
596 (Var. 
.9.2) 
R. A. 3 h I5 m 45 
’ Decl. + 49 0 26' 
R. A. 3 h 31 1 ” 
30 s Decl. + 62° 15' 
I 909-573 
195-90 
i67"oi 
1910.644 
348?8o 
2o8"o9 
.589 
195.98 
166.99 
.666 
348.90 
207.84 
.627 
196.02 
166.88 
00 
VO 
348.80 
207.83 
1909.59 
195-97 
166.96 
1910.66 
348.83 
207.92 
The only other measures are: 
1879.54 195-5 i66"05 211 |T 
B is DM (62°) 594. The principal star is reddish. Probably 
unchanged. 
1879.42 348^64 2o8"33 2n B 1 
From these positions we have for the proper motion of a 
Persei: 
o"o55 in 71! 1 
5 Persei (3.3...10.6) 
The meridian observations leave the amount and direction of 
this motion very uncertain. 
Auwers (F. C.) 
o"o64 
in 
i 66°7 
Auwers (Cor’d) 
o.oii 
in 
105.1 
Newcomb (Stand.) 
0.045 
in 
138.0 
Newcomb (Fund.) 
0.040 
in 
133-9 
Groombridge 
0.029 
in 
146.8 
Boss 
0.039 
in 
135-7 
DM (42°) 787 
( 7 - 5 -• 
. 12 
8) 
R. A. 3 h 27 m 27 s 
Decl. + 42 
°2 9 ' 
A and B 
1909.802 
i9i?oo 
54 " 10 
.818 
191.40 
53-89 
.838 
191.70 
53-84 
1909.82 
191-37 
53-94 
R. A. 3 h 34 m 24'' Decl. + 47 0 24' 
1907.578 
3 I2 °53 
99"22 
.581 
312.40 
99.08 
.657 
312.62 
99.09 
1907.60 
312.52 
99-13 
The only other measure 
of this star is : 
1879.32 3i2°6o 
97"44 
3 n 
From these positions we have for the proper motion of 8 
Persei: 
o"o6o in I27?9 
From meridian observations: 
Auwers 
o"o 39 
in 
i6i?8 
Newcomb 
0.051 
in 
135-3 
Boss 
0.046 
in 
135-5 
Lalande 6772 (7- 5 - •-IO.5) 
No other measures of the small star. The proper motion of 
the principal star, Groombridge 706, is given: 
A. G. Bonn 
o"i79 
in 
137-6 
Porter 
0.174 
in 
137-5 
Groombridge 
0.213 
in 
135-6 
For further comparison I have connected a star 8.3 m closely 
following: 
A and Lalande 6548 
1909.802 
93*67 
I 93"75 
.818 
93-93 
193.42 
.838 
93-70 
193-66 
1909.82 
93-77 
193.61 
From meridian observations we have: 
1878 94?8 i99"o A. G. Bonn 
R- A. 3" 35 m 35” Decl. + 42° 14' 
I 907 - 79 I 
A and B 
28o?57 
47"56 
.807 
281.25 
47-13 
.810 
281.16 
46.97 
•845 
281.50 
47.24 
1907.845 
B and C (12.5) 
1 84°45 
55 " 5 i 
7.964 
184.62 
54-97 
8.000 
184.50 
55-69 
i907.94 
184.52 
55-39 
There are no other measures of the third star. For AB we 
have the following: 
1893.21 277?57 4i'.'69 311 Eng 
1907.81 281.12 47-22 411 P 
These positions give as nearly the same proper motion of A as 
could be expected from the data: 
0V203 in i28?o 
Recent direct measures are: 
1907.26 93?75 I94"40 2n Hertzsprung 
The corrected proper motion of the principal star is therefore: 
o "427 in I26!6 
Some of the former values 
are: 
Stumpe 
o"482 
in 
I 22?9 
Paris 
0-534 
in 
123-5 
Porter 
0.406 
in 
I24.9 
14 
