Burnham: Measures of Proper Motion Stars 
11674. 02 (App.) 231. (7.2...8.0) 
R. A. 22 h i6 ra 37 s Decl. + g° 20' 
1912.810 
.813 
.829 
IIO?IO 
110.70 
110.48 
9i"i2 
90.80 
90.86 
1912.82 
110.43 
90.93 
No change since 1875. 
11677. H 1756. (6.7. 
..10.8) 
R. A. 22 h 16 
m 42 s Decl. + 40° 4' 
A and B 
1912.562 
285 ?7 
21 "96 
• 564 
286.1 
21.89 
.581 
287.0 
22.37 
1912.57 
286.3 
22.07 
A and C (13.5) 
1912.564 
3 2 5°3 
22 ". 2,9 
A and D (11.3) 
1912.562 
75°95 
57 "S 6 
.564 
75-27 
58.35 
.581 
75-35 
57 -81 
1912.57 
75-52 
58.01 
The only other measures are those in 
the General Catalogue. 
11686. 02 
(App.) 232. (8.4...8.4) 
R. A. 22 h 17 
m 34 s Decl. + 3 0 14' 
1906.755 
19+1 
67:64 
7.465 
I 9 I .5 
67.76 
7.502 
191.2 
67.82 
1907.24 
I 9 I -3 
67.74 
1908.709 
19+53 
67 "86 
■ 7 11 
191-23 
67.97 
.728 
I 9 I-I 5 
68.13 
1908.72 
191.30 
67.99 
One of the stars has a 
small proper motion. For determin- 
ing hereafter which it is, I have connected a faint star: 
A 
and C (11.4) 
1908.728 
268?22 
i 75 "o 2 
• 750 
268.33 
174-57 
.788 
268.60 
174-24 
1908.76 
268.38 
174.61 
11691. 51 Aquarii. |3 172. 
(6.7...6.7) 
R. A. 22 h 17™ 52 s Decl. - 
- 5 ° 2/ 
AB 
and C (13.3) 
1912.638 
341°40 
54"53 
.675 
34 I .83 
54-13 
.678 
341.02 
54-42 
• 695 
341.80 
54.62 
1912.67 
341-51 
54-43 
19 
28; 
1912.638 
.675 
.678 
• 695 
AB and D (12.0) 
190:67 
190.38 
190.62 
190.48 
II4"24 
114.65 
114.36 
II 4 -I 7 
1912.67 
190.54 
114-35 
AB and E (10.0) 
1912.638 
I 32?97 
131-46 
•675 
132.68 
132.42 
.678 
133.02 
132.24 
•695 
133-03 
132.47 
1912.67 
132.93 
132.15 
The only other measures of the distant Herschel companions 
depend upon a single night in 1898. It is evident from in¬ 
spection that the proper motion of 51 Aquarii is very small, if 
there is any motion at all. The time interval is too short, and 
the errors in a single measure possibly too large to give an 
accurate value for a proper motion as small as this seems to be, 
but in any event it should be as reliable as that found in any 
other way, and a continuation of the measures after the proper 
interval will cure these defects. Comparing the present posi¬ 
tions with the single observations referred to, we have for the 
approximate motion of the large star: 
AC 
R. A. + o"oo2 
Decl. + o"ooi 
AD 
+ 0.001 
+ 0.005 
AE 
+ 0.003 
— 0.005 
From which we have for the proper motion of 51 Aquarii: 
o".oo2 in 80? 6 
From the star catalogues the results are contradictory: 
Auwers 
0+15 
in 
277:6 
Hedrick 
0.019 
in 
124.8 
Boss 
0.024 
in 
90.0 
11712. Ho 616. (7.2...12.5) 
R. A. 22 h 19”'43 s Decl.+ 21 0 58' 
1909.706 356?7 I 9"56 
.725 356.3 19-69 
.742 358.6 19.21 
1909.72 357-2 19.49 
The companion is very faint; probably no change. 
11716. 34 Pegasi. (3 290. (6.1.. .12.5) 
R. A. 22 h 20 m 31 s Decl. + 3 0 47' 
A and C (13.0) 
1911.564 
27+60 
101' 
.'34 
.583 
271.60 
101 
■ 13 
.644 
272.23 
IOI 
• 13 
1911.60 
271.81 
IOI, 
.20 
For the proper motion 
of the close pair. 
Auwers 
o"259 in 80 °.7 
Porter 
0.259 in 81.1 
Boss 
0.295 in 81.6 
