Burnham: Measures of Proper Motion Stars 
Therefore it is practically certain that the small star, like 
nearly all other of this magnitude, has no sensible movement. 
This will appear independently hereafter from the following: 
B and C (12.0) 
1909.744 
I 50 ?i 7 
1io"64 
.760 
150.05 
hi. 07 
•763 
150.28 
110.82 
1909.75 
150.17 
110.84 
62 Geminorum (4.5... 
10.6) 
R.A. 7"2i m 
34 s Deck + 
■ 32 ° T 
A and B 
1909.780 
29 I?IO 
2i4"o6 
.818 
291.20 
213-95 
.821 
291.06 
213.16 
.838 
291.40 
213-33 
1909.81 
291.19 
213.63 
This star has been previously measured as follows : 
1886.22 292?85 2ii"s6 211 Eng 
1894.25 292.15 212.57 2n Eng 
As these two positions showed a much larger relative change 
than could be accounted for by the accepted proper motion of 
62 Geminorum, Englehardt inferred (A. N. 3373) that the small 
star had a motion of 0V152 in the direction of 239 0 . 
The recent measures do not support this change, and are not 
accordant with one or the other of the early positions. It would 
appear probable that there is some accidental or other error in 
one. A comparison of the position of 1886 with that of 1909 
gives for the proper motion of 62 Geminorum: 
o"225 in 45?2 
This is in substantial agreement with the values found from 
meridian observations: 
Auwers (Brad.) 
Auwers (F. C.) 
Paris 
Boss 
0"227 
in 31:3 
0.238 in 34.5 
0.248 in 34.7 
0.236 in 39.1 
As a further test of any motion in B I have connected a 
third faint star. 
B and C (12.2) 
1909.821 267?io I04"59 
.838 267.33 103.76 
.859 267.14 104.07 
1909.84 267.19 104.07 
Aitken has recently discovered a close companion to the 
principal star: 
1910.19 n?4 2"8o 2n A 
No other measures. The proper motion of the large star is 
j given: 
Auwers 
o"i05 in 
I 96?9 
Boss 
0.119 in 
193.0 
Newcomb 
0.111 in 
191.1 
25 Monocerotis (5-0. 
.10.7) 
R. A. 7 h 3 i m 
19 s Deck- 
- 3 ° Si' 
A and C 
1909.838 
349 °67 
I2l"62 
.859 
349-57 
121.86 
• 933 
349-49 
121.74 
1909.88 
349-58 
121.74 
The small star is SD (3 0 ) 1978 (9.8) 
. The previous meas- 
ures are: 
1887.18 349°07 
122"70 
2n Eng 
1894.27 349-38 
122.38 
2n Eng 
A mean of the first two 
measures compared with the last in- 
dicates a smaller proper motion of 25 Monocerotis than that 
given from meridian observations. 
• 
Measures 
o"o 58 in 
305 °4 
Auwers 
0.124 in 
284.5 
Boss 
0.073 in 
284.4 
The measures should be repeated later on. As a further 
check on the motion, I have measured one of the nearer stars. 
A and B (13.0) 
1909.838 
267! 9 
2S'.'48 
.859 
266.4 
28.22 
■ 933 
266.7 
27.94 
1909.88 
267.0 
28.21 
G 75 Geminorum (4.5.. 
.11.0) 
R. A. 7 h 35 ra 
49 s Deck + 
29 0 io' 
1909.818 
3 i 6?37 
i82" 3 o 
.821 
316.33 
182.13 
.859 
316.57 
182.09 
1909.83 316.42 182.17 
The earlier measures are much too discordant in distance 
to be made use of at this time in finding the proper motion of 
the large star. Evidently the mean value cannot be used. 
Further measures, after a suitable time interval, should be 
made. 
V Geminorum (4.2...13.2) 
R. A. 7 h 2S m 32 s Deck + 27 0 io' 
1911.104 
45°8 
46" 13 
.145 
45-9 
46.24 
.164 
45-4 
45-94 
1911-13 
45-7 
46.10 
29 
1877.29 
3 I 5-48 
I 78"40 
in 
B 1 
1877.84 
315-05 
177.91 
in 
B 1 
1878.83 
3 I 5-25 
179-57 
in 
B 1 
: proper motion of 75 
Geminorum 
is given: 
Auwers 
o"230 in 
i6s?2 
Paris 
0.204 in 
156.5 
Porter 
0.234 in 
165.4 
Boss 
0.247 in 
163.7 
3 
