Burnham: Measures of Proper Motion Stars 
From the six positions of B on 16 n by Doo and (3 (1878- 
I9ii),and the four positions of C by (3 on nn (1900 to 1911) 
we have: 
AB R. A. + o"io6 Decl. 0+81 
AC 0.092 0.087 
+ 0.099 +0.084 
Therefore the proper motion of A is: 
0+30 in 49?7 
No motion found in the star catalogues. 
10289. 
3668. (6.2.. 
•11- 7 ) 
R. A. 2o h 25 
m 49 s Decl. - 
- io° 16' 
A and C 
1908.633 
198+3 
100+5 
.636 
198.40 
100.11 
.652 
198.00 
100.54 
.671 
198.30 
100.00 
1908.65 
198-23 
100.18 
1911.449 
198+0 
100+2 
.468 
198.67 
100.30 
• 545 
198.70 
100.54 
1911.49 
198.66 
100.52 
These measures of the 10.4 m star are made in the interest 
of the large proper motion of AB. 
Bonn 
0+09 
in 
67+ 
Auwers 
0.309 
in 
72.1 
Porter 
0.305 
in 
66.2 
Paris 
0.234 
in 
61.4 
Boss 
0.316 
in 
73 -i 
10298. co 2 Cygni. 3669. (s- 5 - - -13• 5 ) 
R. A. 20 h 26 m 20 s Decl. + 48° 33' 
1909.570 
• 592 
.666 
A and B 
34 i °4 
339-8 
340.9 
18+7 
17.87 
18.13 
1909.61 
340.7 
18.02 
A 
and C (10.0) 
I 909 .S 5 I 
86 ?i 5 
56+0 
• 570 
86.62 
56.54 
• 573 
86.35 
56.22 
1909.56 
86.37 
56.32 
No change in AC, and probably none in AB as the first 
position depends on a single night. It is therefore probable 
that the large star has no sensible proper motion. The results 
from meridian observations are contradictory: 
Groombridge 
0+24 
in 
94°8 
Auwers 
0.042 
in 
160.8 
Boss 
0.010 
in 
65-9 
10315. co 3 Cygni. S 756. (5.0...9.7) 
R. A. 20 h 27 m 36 s Decl. + 48° 49' 
1912.675 
323+5 
57+4 
.678 
323.02 
57-38 
1912.67 
323-03 
57+6 
There are three other stars within this distance from A. 
Comparing the recent measures of B with the single measure 
of 02 in 1840 gives for the 
proper motion of the large star: 
Measures 
0+51 in 201! 5 
Auwers 
0.042 in 160.9 
Boss 
0.037 in 164.7 
10320. 
2 2697 rej. (7.5. 
•- 9 - 5 ) 
R.A. 20” 
28 m 13 s Decl. — 
o° 53 ' 
I 9 II .545 
1 + 
30+2 
.564 
1-3 
30.33 
• 567 
1.2 
30.57 
1911.56 
1.4 
30.41 
The apparent change in distance from the measure of 1848 
is probably not real. 
10325. H 1535. (8.0...11.6) 
R. A. 20 h 28 m 32 s Decl. + 32 0 58' 
1908.537 
• 573 
•575 
A and B 
247 ° 4 
246.3 
246.8 
16+2 
16.77 
17.09 
1908.56 
246.8 
16.93 
A and C (n.6) 
1908.537 
153 + 
18" 54 
• 573 
154 -1 
18.62 
• 575 
154-2 
18.65 
1908.56 
153-8 
18.60 
The proper motion given A seems to be doubtful, at least in 
amount. The distance of B should have increased about 1" 
since 1902. 
Bakhuyzen 0+68 in 47°5 
10335. DM (5 0 ) 4556. (8.6...10.5) 
R. A. 20 h 29 m 14 s Decl. + 5 0 42' 
1908.597 
52+5 
57+0 
•633 
51-83 
57-99 
+36 
51-50 
57+6 
1908.62 
51.86 
57-95 
Large proper motion. (See General Catalogue, Part II.) 
o"sos in 135?3 
259 
