Burnham: Measures of Proper Motion Stars 
6662 . io Draconis. H 3342. (4.8...12.0) 
R. A. 13” 
1911.260 
• 334 
• 337 
47 m 56 s Decl. + 65° 19' 
A and B 
25°08 54"56 
25.97 54-08 
25-43 54-93 
1911-31 
25-49 
54-52 
A and C (11.0) 
1911.260 
63? 10 
9o"26 
•334 
62.87 
89.96 
• 337 
62.96 
90.28 
1911-31 
62.98 
90.17 
Comparing the two recent positions with the single measure 
of 1879 gives for the motion of A: 
AB R. A. + o"o2i Decl. + o"o38 
AC +0.049 —0.063 
It is evident there is some error in the unverified observa¬ 
tion, and that later on it should be rejected as all measures 
should be when made on a single night. 
If we take a mean of the two comparison stars, the proper 
motion of A is: 
0V037 in io9?6 
This motion, so far as meridian positions are concerned, 
is wholly uncertain. 
Auwers 
o"oi7 
in 
217-3 
Boss 
0.004 
in 
140.0 
Groombridge 
0.005 
in 
292.0 
Davis 
O.OII 
in 
257.8 
Newcomb 
0.010 
in 
223.9 
6664 . 02 (App.) 127. (6.3...8.2) 
R. A. I3 h 4 8 m 3 s Decl. + 68° 55' 
A and B 
1912.066 65?15 77"79 
.162 64.98 77-52 
.164 64.90 _ 77-47 
1912.13 65.01 77.59 
B and C (13.0) 
1912.066 65?67 44"&5 
.162 65.10 45-01 
.164 64.90 44-92 
1912.13 65.22 44.93 
The relative motion from measures to 1903 is given in the 
General Catalogue. Further proper motions of the large stars 
from Greenwich (1900) are: 
A 0" 195 in 254?9 
B 0.098 in 287.8 
The faint star is connected to verify the motion of B. 
6668 . 
2 1788. (6.9. 
..7.9) 
R. A. 13’ 
’ 48™ 41 s Decl. 
— 7° 28' 
A and C (10.8) 
I 907 -I 97 
293!00 
127"03 
8.039 
293.32 
126.88 
8.156 
293.02 
126.71 
1907.80 
293 -H 
126.87 
A and D (11.0) 
1907.197 
2 I 5 °IO 
I 56"75 
8.039 
215.30 
156.10 
8.156 
215.10 
156.39 
1907.80 
215.17 
156.41 
For comparison we have the following measures by Engel- 
hardt: 
AC 
1886.38 
292?28 
I 30"52 
2n 
1894.32 
292.67 
129.69' 
3 n 
AD 
1886.38 
215-83 
159-53 
211 
1894.32 
215.68 
158.75 
3 n 
Comparing a mean of the two positions with the recent 
measures, we have for the proper motion of the large star: 
From AC o"203 in 268?6 
From AD 0.182 in 246.5 
The small difference is undoubtedly due to errors of observa¬ 
tion. 
Other values of this motion from meridian positions are: 
Stumpe 
0"207 
in 
271-4 
Auwers 
0.207 
in 
270.0 
Porter 
0.215 
in 
266.3 
Boss 
0.166 
in 
259.6 
6670 . T] Bootis. Sh 169. (2.7...9.0) 
R. A. I3 h 48 m 5S 9 Decl. + 19° o' 
1909.340 io5?i5 U 3"49 
.342 105.23 113-27 
.359 105.80 113.68 
1909.35 105.39 113-48 
The six sets of measures by 02 , H 2 and (3 (1851-1909) give 
for the proper motion of r| Bootis: 
o"3 77 in I98?9 
From meridian positions: 
Auwers 0^351 in I9i?4 
Boss 
0.372 
in 
189.9 
Newcomb 
0.369 
in 
189.8 
6676 . 
ON 
273 - 
( 7 - 5 , 
..8.0) 
R. A. 13” 
5 o m 
19 s 
Decl. 
+ 5 ° 53 ' 
AB 
and h 
1703 
1910.206 
236? 5 
238"8 
• 244 
236.3 
238.6 
.260 
236.6 
238.8 
1910.24 
236.5 
238.7 
h 1703 is bright, with good central condensation. 
1875.40 235°8 236"o in Wn. 
193 
