Burnham: Measures of Proper Motion Stars 
The five positions by 02 , Eng and P (1840-1909) give for the 
proper motion of A: 
o" 37 i in 2i5?9 
But B is not a small star, and might have some movement of 
its own; I have therefore measured a third faint star. 
1909.071 
.148 
.164 
B and C (12.3) 
134-97 
I 35 .IO 
134-97 
69" 10 
68.36 
68.90 
1909.13 
135-01 
68.79 
The proper motion of A from meridian observations is: 
Porter 
o"388 in 
219-4 
Kustner 0.395 in 
216.9 
6434. 2 
25, App. I. (5. 9 -..6- 3 ) 
R. A.13“ 
9 ra 23 s Decl. + 67° 55' 
A and C (7.8) 
1907.214 
229? 6 
ii6"5i 
.217 
229.4 
116.12 
.258 
229.8 
116.21 
1907.23 
229.6 
116.28 
A and B (6.3) 
1907.217 
296? 1 
i78"88 
.258 
296.3 
178.83 
1907.24 
296.2 
178.85 
The six sets of measures of AC (1835 to 1907) give for the 
apparent proper motion of A : 
o'!\6q in 27o?5 
C appears to have no motion in space. 
A and B have shown 
no relative motion since 1835, and therefore they must have the 
same proper motion. From the catalogues we have: 
A 
o"i 57 
in 
274?4 
Schroeter 
0.157 
in 
271.1 
Groombridge 
B 
0.148 
in 
270.0 
Schroeter 
0.158 
in 
274.7 
Groombridge 
6442. 
3 800. (7.1. 
..10.2) 
R. A. I3 h io m 52 s Decl. + 17 0 40' 
1907.331 
9.302 
9-304 
A and B 
iii ?2 
no.3 
in.3 
2?95 
3-33 
3.18 
1908.65 
no.9 
3-15 
A and C (n .0) 
1909.302 
9° 58 
89"3i 
.304 
9.20 
89.69 
1909.30 
9-39 
89.50 
6452. H 529. (9.3.. .11.0) 
R. A. 13” i3 m 59 s Decl. + 35 0 47' 
These small stars have a large common proper motion: 
o"90Q in I54?6 
Porter 
Kustner 
in 
0.874 in 
154-9 
The star measured by Ball is now too distant for good 
measures. I have therefore measured a nearer star in the field. 
A and C (11.6) 
1909-170 74-70 i52"So 
.263 74.95 152.62 
.299 74-78 152.68 
1909.24 
74.81 
152.60 
6458. 2 1735. 
R. A. I3 h I 5 m 44 3 
1907.137 
.258 
• 33 i 
( 9 - 5 -.. 9 - 5 ) 
Decl. + 6° 27' 
1° 9 ° 6 3" 9 5 
no.6 4.10 
109.8 3.97 
1907.24 
Without change. 
IIO.O 
4.01 
6474. 
2 1740. 
(7.1...7.2) 
R. A. i3 h 
I 7 m 33 s 
Decl. + 3 0 20' 
1911.142 
75 “3 
26" 60 
.162 
75-7 
26.64 
. 164 
76.1 
26.54 
1911.16 
75-7 
26.59 
No third star near enough to measure. 
These stars appear to make a system of the 61 Cygni type. 
The relative change is very slow. The proper motions are 
given: 
A 
0"2I7 
in 
6?o 
Porter 
0.201 
in 
351-9 
Glasgow 
0.202 
in 
359-5 
A. G. Alb. 
B 
O.254 
in 
360.0 
Porter 
O.248 
in 
323.3 
Glasgow 
6475. H 226. 
R. A. 13 11 17 m 36 s 
( 11 . 9 ... 13 . 1 ) 
Decl. + 14 ° 38 ' 
The last for the proper motion of AB. No other measures. 
The motion of the large star is given: 
Krueger o"697 in ii3?6 
Porter 0.675 in in.9 
1909.071 
24? 8 
9"47 
.302 
23-7 
9.82 
1909.19 
24.2 
9-65 
Very insignificant object; 
low-power field with H 226. 
no other 
measures. 
h 1595 and DM (14 0 ) 2609 (9.3) 
1909.071 
8 i ?3 
107!'04 
.302 
81.3 
107.09 
1909.19 
81.3 
107.06 
189 
13 
