Burnham: Measures of Proper Motion Stars 
No other measures. The proper motion of the principal star 
is given: 
Argelander o"i72 in 8y°o 
Boss 0.175 in 81.1 
Porter 0.160 in 90.0 
DM (63°) 369 ( 6 . 5 ... 9 . 9 ) 
R. A. 2 h 46™ 31 s Decl. + 63° 50' 
1910.644 I29?33 H5"6o 
.666 129.40 115.89 
.678 129.07 116.50 
1910.66 129.27 116.00 
No proper motion given the large star. It is decidedly 
reddish. The only other measure is: 
1879.40 I29°7 H5"20 211 B 1 
Lalande 5586 (7.1...9.2) 
R. A. 2 h 56’" 2 s Decl. + 35° 58' 
1907.7S8 265 ?03 84" 28 
.807 265. TO 84.07 
.848 265.30 84.45 
1907.81 265.14 84.27 
l Persei (4.2...12.4) 
R. A. 3 h i m 5* Decl. + 49 ° 9 ' 
1911.644 131-73 I46"24 
.663 132.42 146.09 
.720 131.83 146.12 
1911.67 I 3 I .99 146.15 
No other measures. The principal star has a large proper 
motion: 
Auwers F'253 in 93^8 
Boss 1.268 in 93.6 
Newcomb 1.308 in 94.3 
(0 Persei (4.7...II.0) 
R.A. 3 h 3 m 33 s Decl.+ 39° 9' 
1908.845 iii?63 I77"22 
.862 hi. 05 177-55 
.882 hi. 13 177.62 
1908.86 hi.27 177.46 
The only other positions are: 
1879.40 no?8o 176^50' 2ti B 1 
1896.99 112.05 178.13 2n Donner 
The last position is photographic. 
The proper motion of co Persei is small: 
Auwers o"o39 in 300^7 
Boss 0.022 in 277.7 
These stars are DM (35 0 ) 616 and 615. In the first instance 
this was measured by mistake for Lalande 5712 which is about 
4 m f. There are no other direct measures, but from the 
meridian positions there would seem to be considerable proper 
motion in R. A. in one of the stars. 
1889.2 265! 1 8i"2 A. G. Lund 
This is confirmed by the DM places which give 77"7 for A RA. 
On one occasion the principal star was thought to have a very 
faint companion 6" or 8" distant on the f side, but the con¬ 
ditions were not suitable to verify it later. 
Lalande 5712 (7.0. ..8.4) 
R. A. 3 h o m 3 s Decl. + 36° io' 
1907.750 
245?10 
H7"82 
.807 
244.83 
117.90 
.810 
245.26 
117.92 
The mean results are: 
1893.12 
243-15 
116". 22 
2n 
Eng 
1907.79 
245-06 
117.88 
3 n 
P 
It would be unsafe to assume that a 
comparison star of this 
brightness had 
no motion 
of its own. 
In this 
instance it is 
probably fixed. 
The several values of the motion of A are: 
Measures 
o"290 in 
I 3 i°i 
Paris 
0.373 in 
124-5 
Porter 
0.338 in 
I 3 I -9 
Both stars are in A. G. Lund. The smaller is D M (36°) 631. 
DM (47°) 779 (6.9...10.8) 
R. A. 3 h 4 m 8 s Decl.+47 0 17' 
A and D 
1908.884 294? 68 202"08 
.898 295.02 202.17 
.920 294.99 201.95 
For comparison we have the following: 
1880.41 294? 14 198"64 211 B 1 
1908.90 294.90 2Q2.o7 3n p 
If the early position is correct, one of these stars has a proper 
motion of about o"i2, but this must be verified by later measures. 
I have been unable to find any other positions of the small star 
photographic or otherwise. The star catalogues give no proper 
motion to the large star. This is sometimes listed as a red star. 
I have added two new and near companions to the principal 
star, the first of which is very faint and difficult. 
A and B (14.8) 
1908.884 
.920 
•974 
3°4 
7-3 
9.8 
7-47 
7-45 
7-15 
1908.93 
6.8 
7.36 
A and C (13.2) 
1908.884 
I 76?6 
28"06 
.920 
175-5 
28.15 
•939 
176.2 
27.78 
1908.93 
176.1 
28.00 
There is a faint star near D, a re-measurement of which will 
show whether there is any movement in D. 
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