Burnham: Measures of Proper Motion Stars 
x Ceti (3.5. ..13.6) 
R. A. i" 38 m 30" Decl. — 16 0 34' 
1911.813 243?27 iio?93 
.870 243.87 110.69 
.942 243.00 110.63 
1911.87 243.38 110.75 
No other measures. The principal star has a large proper 
motion: 
Auwers 
1 "950 
in 
296? 1 
Newcomb 
1.926 
in 
296.4 
Boss 
1.920 
in 
296.5 
The small star will be within range of the micrometer for 
comparison for a long time. 
Lalande 3153 (7.2...II.8) 
R. A. i h 36 m 24 s Decl. — 18 0 29' 
1911.755 292?03 85^46 
.775 292.60 85.69 
.813 292.63 85.02 
1911.78 292.41 85.39 
No other measures. The proper motion of A is given: 
Porter o!'54i in 90?o 
Piazzi I. 159 (6.0...9.5) 
R. A. i h 39 m 5 s Decl. + 63° 16' 
1907.731 137-75 93"47 
-750 137.50 93-32 
.772 137-28 93.64 
The small star is DM (63°) 241. The measures are: 
1892.21 I35°i3 I02"70 211 Eng 
1907-75 137-51 93-48 311 p 
The correction to the proper motion is small: 
Measures 
o '.'649 
in 
II 2?5 
Greenwich 
0.626 
in 
hi .3 
Porter 
0.636 
in 
1130 
Boss 
0.634 
in 
hi.8 
53 Ceti (4.7.. .6.1) 
R. A. i h 43 ni 41 s Decl. — n° 17' 
1908.652 249?93 i83"54 
.689 250.18 183.98 
.692 250.15 184.09 
It is evident from the following positions that these stars 
are relatively fixed, and that they have a common proper 
motion: 
1888.02 
250^03 
i83"88 
211 
Eng 
1894.88 
250.20 
183.88 
211 
Eng 
1908.68 
250.09 
183.87 
3 n 
P 
There is no third star near enough to connect with either for 
an independent determination of the movement of the large 
stars. The proper motion of 53 Ceti is given: 
Auwers o"2i2 in 246?4 
Porter 0.183 in 244.1 
Boss 0.177 in 243.5 
t Ceti (3.5...IO.0) 
R. A. i” 45 ,n 32 s Decl.— io° 55' 
1907.636 4i?i5 187T17 
.638 40.90 186.88 
.673 41.08 186.89 
The small star is SD (n°) 360. The only measures arc: 
1879.88 40^70 i 85"67 211 p 3 
1907.65 41.04 186.98 3n P 
The proper motion is so small that a longer interval is re¬ 
quired to give a reliable value. From the measures we have: 
o"o 62 in 260?2 
This is a larger and reversed motion in R. A. From meridian 
observations: 
Auwers (Fund.) 
0"028 
in 
i7i°o 
Auwers (A. N. 3508) 
0.029 
in 
149-5 
Newcomb 
0.040 
in 
132.8 
Boss 
0.049 
in 
131-0 
The companion should be measured again some years hence. 
Unfortunately there is no other star near enough to be con¬ 
nected with either with the micrometer. 
a Trianguli (3.6. .. 12 . 9) 
R. A. i” 46 m 15 s Decl. + 29 0 o' 
1909.512 
• 570 
• 589 
A and B 
308?80 84^96 
308.75 84.94 
308.85 85.11 
1909.56 
308.80 85.00 
A and C (12.2) 
1909.589 
182°28 222^69 
-592 
182.37 221.98 
1909.59 
182.32 222.33 
As the early measures are on one night for AB, and single 
distances on two nights 
of the other, further observations 
should be made hereafter. 
AB 1879.59 
304?1 8o"62 in P 3 
AC 1879.67 
182.2 228.30 3n p 3 
From these positions we have for the proper motion of a 
Trianguli: 
Measures 
o" 226 in i82?3 
Auwers 
0.226 in 180.3 
Newcomb 
0.232 in 175.1 
Boss 
0.233 in 175.8 
Lalande 3621 (7.0. 
-- 9 - 5 ) 
R. A. i h 52 m 
5 s Decl. + 32 0 38' 
1907.845 
138^50 
I 3 i"i 8 
7.964 
138.77 
131.18 
8.102 
138.85 
131-14 
For comparison we have 
: 
1893.12 139°15 
I 36"59 
211 
Eng 
1907.97 138.71 
131.17 
3 n 
P 
8 
