Burnham: Measures of Proper Motion Stars 
7060. Sh 190. (6.3...7.3) 
R. A. 14" 50 m 27 s Decl. — 20 0 52' 
As a double star, this was first observed by Sir William 
Herschel in 1791, and subsequently by South and Herschel, who j 
measured the angle and distance in 1S23, and entered it as 
No. 190 of their catalogue of double stars. It was soon found 
that these stars, called seventh and eighth magnitude in Sh, 1 
had an unusually large proper motion of about 2" a year, and 
that there was very little relative change, thus making a system 
of the 61 Cygni type, with a movement in space exceeded only | 
by that famous pair. 
In 1878 I measured four very small stars in the field for 
the purpose of getting later an independent value of the 
proper motion of the large star. It is practically certain that 
no one of these faint stars can have any sensible movement. 
No star of this class anywhere, not attached to and moving 
with a much brighter star, has ever been found to have any 
proper motion whatever. 
The recent measures of the several distant stars are as 
follows: 
A and C 
1911.219 
285? 1 
26"74 
.241 
284.4 
26.84 
1911-23 
284.7 
26.79 
A and D 
1911.184 
II?82 
ioi"i3 
.219 
11.12 
101.53 
.222 
11.67 
101.44 
I9II.21 
H-54 
101.37 
A and E 
I9II.1S4 
191-23 
45"35 
.219 
191.68 
45-38 
.222 
192.45 
45-64 
.241 
192.07 
45-34 
I9II.2I 
191.86 
45-43 
A and F 
I9II.184 
324°55 
i88"49 
.219 
324-55 
188.87 
.222 
324-75 
188.67 
I9II.2I 
324.62 
188.68 
For the present relation of the large stars: 
1911.260 
A and B 
296^14 
I7"88 
.280 
296.75 
I7-56 
.299 
296.19 
17-53 
.302 
296.15 
17.86 
1911.28 
296.31 
17.71 
From the measure by Herschel in 1836, and seven subsequent 
positions by HI, Doo, and (3 on 26 nights, we have for the 
apparent motion of B : 
o"101 in 326?67 
Hence the real proper motion of this star is: 
I"948 in 149-45 
7063. A. G. 196. (9.1...9.4) 
R. A. I4 h 50™ 52 s Decl. + 51 0 7' 
1910.340 
139-0 
25"53 
• 375 
139.2 
25-53 
1910.36 
139 -1 
25-53 
7066. 
2 1893. (8.4.. 
.10.0) 
R.A. I4 h 
5i m 10 s Decl. + 29 0 58' 
1911.107 
237-5 
i 9"50 
.142 
237-5 
19-52 
. 162 
237-6 
19-95 
. 164 
237-6 
19.67 
1911.14 
237-55 
19.66 
The motion is rectilinear, and undoubtedly wholly due to the 
proper motion of the large star. The four positions by 2 , A, 
H 2 and (3 (1832-1911) give for the proper motion of A: 
o'logo in 3i8?3 
No proper motion found in the star catalogues. 
The change in the position-angle of C since 1878 amounts to 
more than 113 0 . It is now very near B, and consequently very 
difficult to see and measure. 
Comparing these positions with those of 1878, given in the 
General Catalogue, we have for the proper motion of A: 
AC 
R. A. + 1 "037 
Decl. — F'781 
AD 
1-057 
1-735 
AE 
1.032 
1.768 
AF 
1.056 
1-757 
1.045 
1.760 
Therefore the corrected proper motion of A is: 
2"o47 in 149?30 
Some of the later determinations from meridian observations 
of the proper motion of the principal star are: 
Bonn 
2"oi4 
in 
I 5 I -27 
Porter 
2.064 
in 
150.47 
Boss 
2.039 
in 
149-35 
7071. 
H 561. (8.3. 
-. 8 . 7 ) 
R. A. I4 h 
5i m 44 s Decl. 
- 13 ° 36 ' 
A and B 
1910.164 
162 ?33 
i26"57 
.260 
162.33 
126.83 
.299 
162.75 
126.58 
1910.24 
162.47 
126.66 
A and C (9-3) 
1910.164 
261?oo 
i 56"50 
.260 
260.73 
156.31 
• 299 
260.95 
156.36 
1910.24 
260.89 
156.39 
The SD number of A in Part I of the General Catalogue 
should be 4020. B and C are Nos. 4022 and 4019. The only 
other measures are those given in G. C. Part II. 
199 
