Burnham: Measures of Proper Motion Stars 
DM (23°) 3299 (7.0...9.3) 
R.A. i8 h 
i3 m 8’ Decl.+ 23° 15' 
A and B 
1908.403 
125^85 
I 55'^89 
.422 
125.63 
155-99 
.425 
125.85 
156.20 
1908.42 
125.78 
156.03 
A and a (11.8) 
1908.422 
222?58 
37 " 6 o 
.425 
222.50 
38.02 
1908.42 
222.54 
37 - 8 i 
The only earlier measure is: 
1878.50 i25°.gi i56"6i 2n B 1 
109 Herculis (4.1... 10.6) 
R. A. i8 h i8 m 35 s Decl. + 21 0 43' 
1909.186 320?55 222"oo 
.304 320.50 221.50 
.340 320.63 221.84 
1909.28 320.56 221.78 
We have the following earlier measures of the small star: 
1854.70 320?7o 204"8 o in 02 
1868.55 320.95 208.81 in 02 
1883.54 320.52 213.79 2n H2 
The several positions give for the corrected proper motion 
of 109 Herculis: 
o"3i4 in I37°6 
Some of the prior values are: 
Auwers 
o''3io 
in 
144-8 
Newcomb 
0.325 
in 
143-6 
Boss 
0.326 
in 
143.6 
X Draconis (3.8...I2.0) 
R. A. l8 h 
23IJ1 j2 8 Deck + 
72 0 41' 
A and B 
1908.252 
i 8!55 
149 " 1 9 
.2 66 
18.60 
148.94 
.370 
19.02 
149-34 
.383 
18.88 
149.41 
1908.32 
18.76 
149.22 
B and C (13- 5 ) 
1908.383 
300?4 
io"30 
.422 
301.2 
10.05 
.425 
302.8 
10.20 
1908.41 
301.5 
10.18 
For comparison we have: 
1879.33 26?50 I44"6i 2n P 3 
1908.32 18.76 149.22 411 P 
These positions give for the proper motion of x Draconis: 
o''704 in 126°. 6 
From meridian observations: 
Auwers 
0*642 
in 
126° 6 
Groombridge 
0.653 
in 
125.6 
Newcomb 
0.643 
in 
126.1 
Boss 
0.638 
in 
125.4 
There are no other measures of BC. 
Oxford (Z 26°) 50932 (12.4) 
R. A. i8 h 30 m 26?9i Decl. + 26° 10' 3 i"i 
Place for 1900 from a plate of the Oxford Astrographic 
Catalogue taken 1907.54. The proper motion is given: 
0M70 in I98?5 
A and B (11.9...12.4) 
1910.414 
.436 
0 0 
I's tx 
00 CO 
6o'.'52 
60.14 
1910.42 
48.70 
60.33 
A and C (12.4) 
1910.414 
37°23 
81 "92 
•436 
37-13 
81.88 
1910.42 
37-18 
81.90 
Oxford 50932 and 50936 
1910.41 A R. A. + 42*24 A Decl.-j-7''75 p 
I 907 -S 4 42.35 7-8 Oxf 
As these two stars are supposed to be moving in nearly 
opposite directions, the difference in declination should in¬ 
crease about o"3 per year. 
Oxford (Z 26°) 50936 (io.l) 
R. A. i8 h 3i m 9?26 Decl. + 26° 10' 38"9 
This is DM (26°) 3302 (9.3). The place given is for 1900, 
from an astrographic plate taken 1907.54. The Oxford proper 
motion, deduced from this and an earlier plate, is: 
o"i24 in 36^0 
A and B (9.3.. .9.8) 
1910.414 34 I .65 95"42 
.436 341-62 95-73 
1910.42 341.63 95-57 
A and DM (26°) 3297 (9.1) 
1910.414 245?40 29i'T6 
.436 245.17 290.95 
1910.42 245.28 291.05 
The place of A, derived from the A. G. position of the com 
parison star, does not indicate any sensible proper motion. 
DM (6°) 3855 ( 5 . 0 ... 13 . 3 ) 
R. A. i8 h 30 m 49 s Decl. + 6° 35' 
A and B 
1910.586 
32i!6 
267 4 6 
.589 
322.3 
26.93 
.605 
323-6 
26.55 
1910.59 
322.5 
26.65 
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