Burnham: Measures of Proper Motion Stars 
13 Orionis (6.0...9.5) 
R. A. 5" i m 4* Decl. + 9 0 19' 
1907.675 
264 °26 
124"!1 
.692 
264.50 
124.05 
.769 
264.18 
124.37 
1909.722 
264.95 
123.90 
• 744 
264.90 
123-75 
.760 
264.58 
124.25 
The small star 
is not in DM. 
The measures are: 
1852.90 
255-20 
I 28 " 2 I 
211 02 
1876.14 
259.02 
126.50 
2n 02 
1907.71 
264.31 
124.18 
3 n P 
1909.74 
264.81 
123.97 
3 n P 
The correction 
to the proper 
motion of 
13 Orionis is 
small. 
Measures 
o '.'373 
in 
l8l?2 
Auwers 
0-374 
in 
183.8 
Porter 
0.376 
in 
182.9 
Boss 
0.381 
in 
179.1 
The comparison star is given in A. G. Leipsic from which we j 
have: 
DM (37°) 
1074 (8.6. 
..9.0) 
R. A. 5 h 3 m 
5 s Decl. + 37 0 9' 
1909.093 
24G58 
135-10 
.706 
241.40 
135-17 
•763 
241.35 
134-77 
1909.52 
241.44 
135-01 
The smaller star is DM (37 0 ) 1072. There is no evidence of 
proper motion in either. 
1878.02 24G04 135^25 2n B 1 
SD (9°) 1094 (8.3...9.2) 
R. A. 5 h 6 m 17 s Decl. —9 0 5' 
1908.750 
230:83 
H 9 "o 3 
08.884 
231.23 
119-34 
08.898 
231-34 
H 9-45 
1910.835 
231.41 
118.33 
10.931 
231.48 
1x8.14 
10.933 
231.03 
118.22 
11.088 
231.20 
117.76 
1884.1 26o?4 123:7 
3 Eridani (3.O...II.0) 
R. A. 5 h i m 59 
Decl. — 
5 ° 15 ' 
1907.636 
142?40 
ii6"73 
.675 
142.40 
117.06 
.692 
142.34 
117.01 
The only measures are: 
1879.95 i43°6o 
116:65 
211 
P 3 
1907.67 142.38 
116.93 
311 
P 
The comparison star is SD (9 0 ) 1093. The other is supposed 
to have a considerable proper motion. This is supported by the 
SD positions which give 236°: 116". No other measures. The 
mean results of the foregoing are: 
1908.84 231? 13 119:27 3n 
1910.95 231.28 118.11 4n 
These positions indicate for the approximate proper motion 
of A: 
o"s7 in 2i6?2 
The following is from meridian observations: 
1890 226?8 131T5 Herz 
Giving for the proper motion of the large star: 
Measures 
o"ogo 
in 
238? 7 
Auwers 
0.135 
in 
236.2 
Newcomb 
0.112 
in 
228.3 
Boss 
00 
t —• 
c 
in 
228.2 
16 Orionis (5.8...12 
.6) 
R. A. 5 h 
2 m 44 s Decl. + 
9 ° 40 ' 
A and B 
1909.760 
12i :p5 
SS "34 
.838 
122.13 
88.80 
1909.80 
122.04 
88.57 
A and C (10.3) 
1909.722 
227:83 
167:86 
.760 
227.72 
168.18 
.838 
227.80 
168.03 
1909.77 
227.78 
168.02 
No other measures. The proper motion of 16 Orionis is 
small. 
Auwers o"o68 in 96:7 
Boss 0.074 in 94.6 
DM (39°) 
1257 (7.6. 
•.12.7) 
R. A. 5” n m 
49 s Decl. + 39 0 13' 
A and B 
1909.821 
342 ? 6 
i 8"97 
.859 
342.7 
18.90 
1909.84 
342.6 
18.93 
A and C (9.0) 
1909.802 
317-64 
189:72 
.818 
317-63 
189.87 
.821 
3 I 7 . 3 I 
189.53 
1909.81 
317-53 
189.71 
A is the principal star of the Herschel cluster, h 350; some¬ 
times called red, but only slightly reddish now. There are 
many stars much nearer A than C; one of the nearest is 
measured above. C is DM (39 0 ) 1254. For comparison we 
have: 
1878.04 317:52 190:60 2n B 1 
1880. 3I7-6 189.4 A. G. Lund 
1893.19 317.6 190.01 Donner 
The last position is derived from astrographic plates. 
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