Burnham: Measures of Proper Motion Stars 
Oxford (Z 26°) 28107 (7.2) 
R. A. io h 11"' i9?i6 Decl. + 26° 21' sg"6 
This is the 7.5 m star, DM (26°) 2065, with the photographic 
place for 1900. The Oxford proper motion is: 
o"305 in 154?1 
There is no available comparison star for the micrometer. 
A and DM (26°) 2662 
1910.93 AR. A. — 62?7o A Decl. — 127'Ti 
A comparison of this with the A. G. positions of 1875 indi¬ 
cates a proper motion in A of o"243 in 15G7. 
Lalande 
R. A. io” 17' 
1907.997 
8.000 
8.022 
20155 (8.5...8.7) 
m 32 s Decl. + 3 0 14' 
A and B 
25!18 100''73 
24.70 IOI.OI 
24.63 101.32 
1908.01 
24.84 
101.02 
A and C (10.3) 
1907.997 
I 45°45 
167"77 
8.000 
145-25 
167.13 
8.022 
145-35 
167.70 
1908.01 
145-35 
167.53 
Groombridge 
1636 (6.5 
..8.8) 
R. A. 10” ii m 33 s Decl.-f 
44 ° 39 ' 
1908.025 
I 03?75 
i5i"o7 
•057 
103-75 
150.84 
.118 
103-93 
150.84 
The micrometer positions 
are: 
1893.30 io5?oo 
I 52"36 
2n 
Eng 
1908.07 103.81 
150.92 
3 n 
P 
B is DM (44 0 ) 1975. The measures 
give for 
the proper 
motion of the large star: 
o "234 
in I90?2 
This is considerably smaller than the 
transit values, but if 
the measures are combined with the positions in 
A. G. Bonn 
for 1881, the proper motion would be still less. 
The prior values are : 
Stumpe 
o"3H in 
j 73°8 
Groombridge 
0.304 in 
165.0 
Porter 
0.295 in 
174-6 
Paris 
0.328 in 
166.5 
Boss 
0.310 in 
169.1 
DM (20°) 2465 and 2464 (9.0. ..9.4) 
R. A. 10" i3 m 6 
Decl. + 20° 28' 
1907.845 
332°88 
99 "o 7 
8.022 
333 03 
99.18 
8.025 
333-05 
99-04 
1907.96 
332.99 
99.10 
The measures in this case, covering more than half a century, 
should give a very accurate value of the relative motion. 
1856.77 32I°32 
m "52 
2n 
02 
1869.82 323.80 
108.01 
2n 
02 
1879.78 326.25 
105-53 
2n 
02 
1893.23 329-39 
101.50 
2n 
Eng 
1907.96 332.99 
99 -io 
3 n 
P 
These positions give for the proper motion of A: 
B is DM (3 0 ) 2357. The motion of A is determined from the 
following transit and micrometer positions: 
1842.3 
24?2 
82" 12 
Lamont 
1880.5 
25-9 
92.60 
A. G. Alb. 
1891.22 
24-99 
96.47 
3 n 
Eng 
1908.01 
24.84 
101.02 
3 n 
P 
Therefore the apparent motion of L 20155 is: 
0^289 in 207? 9 
Some of the meridian values are: 
Stumpe 0^278 in 2o8°6 
Porter 0.290 in 211.1 
Boss 0.283 in 212.0 
There are no other measures of the third star. 
Oxford (Z 26°) 28528 (9.4) 
R. A. io h 22 m 46*27 Decl. + 25 0 24' 3" 1 
This is the 8.8 m star, DM (25 0 ) 2255. The place from an 
astrographic plate taken 1908.25 is for 1900. From a compari¬ 
son with a prior photograph, the proper motion is given: 
o"i36 in 28o?6 
A and B (9.0.. .11.5) 
1911.142 
226?60 
207^40 
.164 
226.50 
206.72 
.184 
226.65 
207.23 
1911.16 
226.58 
207.12 
DM (32° 
) 2066 (6.5... 
to.5) 
R. A.io h 35 
, m 28 s Decl. + 
32° 19' 
1909.109 
i73-6o 
II 7 -I 9 
. 170 
173-48 
116.97 
. 186 
173-55 
117.08 
•933 
173.26 
116.60 
• 936 
173-42 
116.26 
1909.47 
I 73-46 
116.82 
The only other measure of this is the following: 
1879.60 I72?98 119'Ti 2n B 1 
o"488 in 267?5 
This is near y Leonis. The proper motion from meridian 
observations is: 
If the measures are correct, the principal star should have 
proper motion of 
o"o 78 in 144 0 
a 
Stumpe o"534 in 270?3 The only value from meridian positions is: 
Porter 0.495 in 269.1 Boss o"o30 in 180° 
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