Burnham: Measures of Proper Motion Stars 
The only other measure of C is: 
1880.28 35o?i4 I76"2i 2n B 1 
These positions give substantially the same proper motion of 
A as that derived from the measures of AB, but in view of 
the number of measures, and especially the shorter time in¬ 
terval, this value at this time is entitled to much less weight. 
Measures of AB o'T8o in 94^8 
Greenwich 0.181 in 94.1 
11931 . H 5359. (9..-9+) 
R. A. 22 to 38'" 34 s Decl. — 4 0 37' 
1910.684 
.701 
•739 
A and C (12) 
347 °o 
347-2 
345-6 
i6"6o 
16.86 
i 6 -S 5 
1910.71 
346.6 
16.67 
A and B 
1910.684 
6 4 °9 
2o"27 
.701 
65.6 
20.56 
•739 
65-4 
20.59 
1910.71 
65-3 
20.47 
Only very recent measures. The magnitudes given here are 
by Herschel. 
11936 . P 450. (7.0...9.2) 
R. A. 22 h 38 m 40 s Decl. + 38° 50' 
11942 . H 1807. (8.5...8.s) 
R. A. 22 h 39 m 29 s Decl. + 67° 6' 
A and BC 
1910.760 i88?4 23^37 
•777 189-0 23.07 
.780 187.8 23.68 
1910.77 188.4 23.37 
The only other measure is that of 1899. 
B and C (= Hu 92) 
1910.7S0 350?7 o"88 
The proper motion of the principal star is: 
Schroeter o"o89 in 252?3 
11952 . 22941. (7.5...10.2) 
R. A. 22 h 40'” 7 s Decl. + 18 0 37' 
1910.681 264?3 iT'41 
. 698 265.0 11.22 
.701 264.2 11.31 
1910.69 264.5 11.31 
The measures by 2 , A and P (1830-1910) give for the proper 
motion of A: 
o"o34 in 62?8 
A and C (12.5) 
1910.742 
235°7 
io "37 
.760 
237-9 
10.30 
• 777 
235-8 
10.56 
1910.76 
236.5 
10.41 
The change in C is explained by the proper motion of AB 
(2 2942). This is given from meridian positions: 
Battermann o"o27 in 235°9 
The measures of AC (1878-1910) give: 
o"o24 in 169^8 
11938 . 13 Lacertae. 02 479. (5.4...10.8) 
R. A. 22“ 38™ 44 s Decl. + 41 0 11' 
1910.684 I28?5 I4"77 
.698 129.8 14-83 
.701 129.2 14-79 
1910.69 129.2 14.80 
11957 . § Pegasi. H 301. (4.3. ..12.3) 
R. A. 22 h 40"' 42" Decl. + 11 0 33' 
A and C (12.6) 
1907.711 
• 731 
•750 
i7?6o 
17-65 
17.00 
I 38!'32 
138.06 
138.65 
1907.73 
17.42 
138.34 
1912.810 
15-93 
I 40"45 
.813 
16.42 
140.56 
.867 
16.43 
140.22 
1912.83 
16.26 
140.41 
The only other measure of this star is: 
1879.52 2i?75 i 27"33 2n p 3 
These positions give for the corrected proper motion of the 
large star: 
o"54i in 155?1 
No relative change. The 
proper 
motion of 13 Lacertae is 
From the catalogues we have: 
small: 
Auwers 
o'.' 5 i 4 
in 
i 5 8? 9 
Auwers 
o"o 35 
in 
290? 1 
Porter 
0.541 
in 
158.9 
N ewcomb 
0.016 
in 
306.9 
Paris 
0.528 
in 
157-2 
Boss 
O.OII 
in 
303-6 
Boss 
0-545 
in 
155-2 
292 
