Burnham: Measures of Proper Motion Stars 
The only measures are: 
1879.89 57+5 179” 92 211 p* 
I 907.79 57.17 179-93 3 n 3 
If the large star has any proper motion at all, it is evidently 
far below the errors probable in observations with any instru¬ 
ment; and any result deduced from such positions has no mean¬ 
ing. This appears from the transit observations: 
Auwers 
0+20 
in 
272? 9 
Newcomb 
0.001 
in 
352.9 
Boss 
0.002 
in 
180.0 
Piazzi V. 
146 (6.7.. 
.9.6) 
R. A. 5“ 3i m 36 s Decl. + 53 0 27' 
1907.731 
7 o ?58 
97-30 
.769 
70.38 
97.64 
.788 
70.60 
97-55 
.810 
70.76 
97.14 
.845 
70.70 
97-55 
These stars have exactly the same proper motion. 
1891.26 70+8 
97 ”47 
211 
Eng 
1907.79 70.60 
97-44 
5 n 
3 
The small star is DM (53 0 ) 935. Both are in A. 
G. Harvard, 
but the difference in declination is erroneous. 
The proper 
motion is given: 
Stumpe 
0"570 in 
i8i?4 
Greenwich 
0.510 in 
179.2 
Porter 
0.539 in 
182.x 
Boss 
0.512 in 
178.7 
For an independent determination of this proper motion here- 
after, I have measured a faint star from each: 
A and a (12.7) 
1907.788 
301+0 
81 "92 
8.000 
301.50 
82.15 
8.063 
302.20 
82.69 
1907.95 
301.57 
82.25 
1909.859 
302?20 
82+8 
09.936 
302.68 
82.97 
10.605 
302.16 
83.02 
1910.13 
302.35 
82.92 
B and b (12.4) 
1907.788 
159-62 
I 3 I +9 
8.000 
159.48 
131-02 
8.063 
I 59-58 
131-33 
1907.95 
I 59-56 
131.18 
1909.859 
159+7 
129+6 
09-936 
159-25 
129.06 
10.605 
159-03 
130.00 
1910.13 
159.18 
129.67 
A and DM (53°) 930 (9.0) 
A R. A. 76? 3 A Decl. 78+ A. G. Harv. 
76.2 98.0 3 
Lalande 10797 (7.4.. 
. 11 . 1 ) 
R. A. 5 h 37 m 47 
Decl. + 37 0 15' 
1909.093 
in .49 
129+1 
.802 
111.27 
129.09 
.818 
III. 23 
129.25 
.821 
111.46 
129.06 
1909.63 
in-36 
129-33 
The earlier measures are as follows: 
1880.52 114?13 
148+4 
211 
Therefore the proper motion of Lalande 10797 is 
o"693 
in I32?2 
From meridian positions this has been 
given: 
Stumpe 
o" 689 in 
135-7 
Porter 
0.688 in 
137.2 
Lalande 10959 (8.7. 
..9.2) 
R. A. 5” 
40 m 10 s Decl. 
- 15 ° 6' 
A and B 
1908.060 
158+5 
142+3 
.159 
158.00 
142.90 
• 750 
157-73 
142.77 
1908.32 
158.03 
142.87 
A and C (9.7) 
190S.060 
22I?8o 
168+8 
• 159 
221.72 
167.76 
• 750 
221.60 
167.98 
1908.32 
221.71 
168.17 
B and C are respectively SD (15 0 ) 1153 and 1150. The fol¬ 
lowing are the only other measures: 
AB 1894.04 I57°92 I45"62 411 Eng 
AC 1894.04 221.03 168.70 311 Eng 
Comparing these positions with the recent measures, we have 
for the annual motion of the principal star: 
AB R. A. + o".ogi Decl. — 0+70 
AC 0.081 0.120 
+ 0.086 —0.145 
Therefore the corrected proper motion of Lalande 10959 is: 
0+69 in I 49?3 
This has been given from meridian observations: 
Stumpe 0+65 in I46?3 
Porter 0.162 in 133.4 
There are other small stars near, two of which I have 
measured: 
A and a (i 3 - 3 ) 
1908.060 
228?62 
27" 11 
.159 
227.10 
26.68 
• 750 
227.63 
27.14 
1908.32 
227.78 
26.98 
1874 
1909.89 
22 
