Burnham: Measures of Proper Motion Stars 
6828 . Ho 384. (6.5...12.0) 
6869 . DM (24 0 ) 2733. (9.0...9.0) 
R. A. I4 h I5 m 42 s Decl. — 7 0 32' 
1907.348 
5 i°r 
27-45 
8.192 
50.2 
27.46 
8.266 
49-7 
27-36 
1907.94 
50.3 
27.42 
Change from proper motion of A which should be about 
o"i6 in 230°. Further measures will give a definite value. 
R. A. 14” 2o m 
11 s Decl.+ 24°i2' 
A and B 
1907.140 
74-4 
45"35 
.197 
74-5 
45.26 
.217 
74.1 
45.01 
1911.164 
74-30 
45 -H 
.184 
73-93 
45 -H 
.200 
74.20 
45-34 
6837 . 21833. (7.0...7.0) 
R. A. 14" i6 ra 18 s Decl. — 7 0 13' 
B 
and C (12.3) 
1910.206 
197-23 
io 3"79 
.223 
196.60 
103.36 
.260 
196.23 
104.09 
1910.23 
196.69 
103-75 
For the proper motion of AB. 
The large stars, AB, seem to belong to the 61 Cygni class. 
The proper motion is given: 
Bossert 
0" 120 
in 
i8o?o 
Radcliffe 
0.171 
in 
185.0 
Porter 
0.132 
in 
180.0 
6840 . H 
2714. (7.6. 
. .10.2) 
R. A.i4 h i7 m 
18 s Decl. 
— 19 ° 15 ' 
1909.381 
279°9 
24 "S 7 
12.296 
279.1 
24-55 
1910.79 
279-5 
24.56 
The change is due to proper motion in A. Further measures 
after the proper time interval will give an accurate value for 
this movement. 
Battermann o"o33 in J 54°7 
6858 . H 546. (7.0...10.4) 
R. A. 14” i8 m 48 s Decl. — 12 0 49' 
1911.222 43°10 40"16 
.241 43-io 40.10 
1911.23 43.10 40.13 
The other measures are of late date. 
h 1798 (=h 3569), which is about 10' north of H 546, is too 
diffused and indefinite for good measures. 
6864 . H 2720. (8.8...13.2) 
R. A. I4 h I9 m 30 s Decl. + 47 0 i' 
1907.217 
29-3 
20" 5 5 
8.063 
31-4 
20.07 
9.170 
31-2 
20.21 
1908.15 
30.6 
20.28 
No other measures. 
The several mean results of my measures of AB are as 
follows: 
1903.02 
74?7 45 " 2 i 
4 n 
1904.31 
74.5 45.02 
3 n 
1905.42 
74.1 45.22 
2n 
1906.12 
74.1 45.19 
3 n 
1907.18 
74-3 45-21 
3 n 
1911.18 
74.1 45-19 
3 n 
It is evident that these stars have exactly the same proper 
motion. 
For star-catalogue positions see General Catalogue, 
Part II. 
A and C 
1907.197 
H 9?8 
I 77"32 
.217 
H 9-5 
177.17 
.258 
H 9-7 
177-51 
• 331 
H 9-5 
177.19 
1909.112 
119.50 
175-29 
. 164 
119.44 
174-90 
.186 
H 9-35 
174.96 
1910.164 
119.20 
I 73-56 
.167 
119.20 
173-49 
. 184 
119.20 
I 73-63 
1911.142 
118.83 
171.97 
. 164 
118.78 
172.58 
. 184 
119.12 
172.27 
.200 
118.93 
172.42 
The results of all my measures of AC are: 
1903.02 
i20?6 182^30 
4 n 
1904.32 
120.2 180.57 
2n 
1905.42 
120.0 179-34 
3 n 
1906.18 
119.9 178.56 
6n 
1907.25 
119.6 177-30 
4 n 
1909.15 
119.4 175-05 
3 n 
1910.17 
119.2 I 73-56 
3 n 
1911.17 
118.9 172.31 
4 n 
A continuation of these measures will give the proper motion 
of AB with the greatest accuracy. It is absolutely certain from 
the measures of the exceedingly faint star a that C has sensible 
movement. These measures give for the proper motion of AB : 
1"348 in 145.2 
From the Berlin and Cincinnati meridian positions we have: 
Porter i'^Si in I43?5 
In the proper motion of A given on p. 1076 of the General 
Catalogue from the micrometer measures of AC for i".6q6 read 
1"382. 
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