Burnham: Measures of Proper Motion Stars 
Assuming that B has no sensible motion, the four positions 
by A, Fr and (3 (1876-1910) give for the proper motion of A: 
o'.'227 in 230^2 
To determine this hereafter, I have connected a faint star: 
A and C (12.2) 
1910.184 i6o?04 87'.'82 
.186 160.66 88.03 
.225 160.53 88.89 
1910.20 160.41 88.25 
B and DM (36°) 2170 (8.0) 
1825 A R. A. 2 m 52?4 ADecl. 57'.'2 Weisse 
1875 2 53.2 59.2 A. G. Lund 
1910.2 2 53.3 60.4 (3 
5707. 21517. (7-3-•-7-3) 
R. A. 1 i h 7 m 24 s Decl. + 20° 47' 
AB and C (10.4) 
1910.091 ioi?93 211”28 
.093 102.10 211.25 
.107 102.05 211.53 
1910.10 102.03 211.35 
The prior positions by 02 depend upon a single night each. 
From a comparison with the present measures we have an 
independent value of the proper motion of AB : 
o"40i in 251!1 
The later determinations from meridian observations are: 
A. G. Ber. o"4i7 in 252?3 
Porter 0.425 in 251.8 
5708. Arg. 24. (9.0...9.2) 
R. A. 11" 7 m 36 s Decl. — 15 0 19' 
1910.164 35i°2 i7"6o 
.206 350.1 17.91 
.244 351.2 17.51 
1910.20 350.8 1767 
h 837, which should be about 15' distant and nearly p Arg. 24, 
was not found; doubtful in Dreyer. 
5709. 5 Lconis. [3 1282. (2.5...9.1) 
R. A. ii h 7 m 43 s Decl.+ 21 0 it' 
A and BC 
I907.102 
. 120 
• 173 
344°4 
344-1 
344-4 
188'.'58 
188.63 
188.79 
1907.13 
344-3 
188.67 
1911.260 
344°30 
1 89*44 
•315 
344-05 
189.24 
1911.29 
344-17 
189.34 
A and a (12.5) 
1911.222 40?93 95"17 
.260 40.90 95-67 
1911-24 40.91 95-42 
An earlier measure of this star, not given in the General 
Catalogue, is: 
1879.26 44° 35 95-38 2n | 3 3 . 
From the two positions of A a (1879-1911) and the seven of 
A and BC (1850-1911) we have for the proper motion of 
5 Leonis: 
A and a R. A. + o" 140 Decl. — o" 130 
A and BC +0.145 —0.119 
Therefore the motion of the large star is: 
Measures o'T89 in 13C2 
From the star catalogues we have: 
Auwers 0.181 in 131.5 
Newcomb 0.206 in 133.0 
Boss 0.207 in 134.4 
5721. 02 (App.) 109. (7.4...8.0) 
R. A. n h 9 m I s Decl.+ 46° 31' 
1910.128 257?40 So"25 
.148 257.38 80.11 
.167 257.53 80.20 
1910.15 257.44 80.19 
Change in distance. One of these stars has a proper motion 
of about o"o38 along the line joining the components. 
5727. H 2564. (9.3... 10.9) 
R. A. n h io m 3 s Decl.+ 42 0 55' 
No micrometer measures of this pair, hut from the proved 
accuracy of the astrographic positions at Helsingfors, the fol¬ 
lowing is sufficient at this time: 
1895.32 i27?9 3 2 "-33 Donner. 
5729. 0 Leonis. Sh 121. (4.6...8.5) 
R. A. ii h io m 34 s Decl. — 3 0 o' 
1907.997 
288^48 
97*86 
8.000 
288.65 
98.26 
8.022 
288.95 
98.44 
8.039 
288.33 
98.34 
1908.01 
288.60 
98.23 
In computing the proper motion, the measures by H and Sh 
cannot be used for obvious reasons. The four positions by 
Eng and (3 (1881-1908) give for the apparent motion of the 
large star: 
o'.'i23 in 27i?7 
The micrometer measures, with the relation of these stars 
in Weisse, give a larger value: 
o'.'i47 in 275?6 
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