Burnham: Measures of Proper Motion Stars 
The four positions (184 
of A: 
1-1907) give 
for the relative motion 
o"o27 in 3io?2 
As B is nearly 7 m, this motion, wholly or in part, may belong 
to that star. To determine that hereafter, I have measured a 
third small star: 
A and C 
1907.578 
26o?7o 
i 5° , -36 
• S8i 
260.87 
150.67 
.638 
260.88 
150.33 
1907.60 
260.82 
150.45 
2126. 2523. (7.2.. 
.9.2) 
R. A. 4 h i2 m 
34 s Decl. + 23 0 27' 
A and B 
1908.613 
i62?3 
io "37 
.633 
162.9 
10.36 
.636 
162.2 
10.36 
1908.63 
162.5 
10.36 
A and C (8.0) 
1908.613 
4 S ?23 
io 8"49 
• 633 
48.03 
108.48 
.636 
48.20 
108.38 
1908.63 
48.15 
108.45 
The only other measure 
of the distant star is: 
1893.03 48?13 
109'Ti 
211 Gla 
2128. 02 (App.) 49. (7.0...7.2) 
R. A. 4 h I2 m 
41 s Decl. + i° 29' 
I 9 II- 93 I 
I 44°70 
I02"9I 
11.942 
144-63 
103.07 
12.008 
I 44.58 
103.38 
1911.96 
144-63 
103.12 
These nearly equal stars have the same proper motion, if any. 
There is no third star for 
comparison. 
2 1 34. 55 Tauri. 02 79. 
(7.0...8.8) 
R. A. 4" 13" 1 
3 s Decl. + 16 0 14' 
1908.709 
3o8?o 
o"27 
The proper motion of the binary system is given: 
Auwers o"io7 in io6?4 
Weersma 0.095 in 103.4 
This belongs to Boss’ group of Taurus stars with common 
proper motion. 
2143. Knott 2. (9.6...9.6) 
R. A. 4 h I4 m 49 s Decl. + 19 0 32' 
1907.022 202?4 2V75 
.102 205.2 3.20 
.118 205.0 2.90 
1907.08 204.2 2.95 
This star has been thought to be variable. 
When the foregoing measures were made, Hind’s variable 
nebula, which is about 20' s, was examined and found to be still 
invisible. In 1890 the nebula was very plain with the 36-inch 
at the Lick Observatory, with a length of 4" or 5" in the direc¬ 
tion of about 150° (Monthly Notices LI, 94). The 9.4 m star, 
DM (19 0 ) 7 °S> is in the centre. This may be only the nucleus 
of the nebula. The magnitude now is about 10.8. The faint 
nebula in the field sp, photographed by Keeler with the 3-foot 
reflector (Monthly Notices LX, 424) was not seen. This is too 
faint to be visible with the largest apertures except under the 
most favorable conditions. Nothing seems to be known as to 
the period of Hind’s nebula. (See Pub. L. O. II p. 175.) 
The 8.7m star, DM (19 0 ) 704, which was connected by 
measures with the nebula in 1890, has a small companion: 
1907.102 40?o 59"39 
.118 40.7 59.04 
1907.11 40.3 59.21 
2150. Ho 329. (6.0. ..13) 
R. A. 4 h I5 m 19 s Deck —o° 23' 
A and B 
1909.091 
64?o 
35"74 
.703 
63-5 
35-83 
1909.40 
63-7 
35-78 
As A and B appear to have a common proper motion, I have 
measured a third star. 
Porter 0H38 in 195^7 
A and C (11.0) 
1909.071 
279-40 
198"11 
.091 
279.20 
197.82 
.703 
279.28 
197.41 
1909.29 
279.29 
197.78 
about 40' distant sp Ho 329. 
h 313 and DM (— i° 
) 617 
1909.785 
241 “7 
I 72"23 
.838 
242.6 
172.15 
1909.81 
242.1 
172.19 
2158. 
2 537 . (8.1. 
..11.2) 
R. A. 4" 
i6 m 2i s Decl. 
— 10° 14' 
1908.750 
342°o 
i 6"43 
.824 
341.6 
16.25 
.884 
342.1 
16.52 
1908.82 
341-9 
16.40 
The five positions by 2 , A and (3 (1832-1908) give for the 
proper motion of A: 
o"o40 in 209?7 
123 
