Burnham: Measures of Proper Motion Stars 
is for 1900 from a plate taken 1904.76. The photographic 
positions give the proper motion: 
o" 228 in 237?7 
With the A. G. position the change is smaller and uncertain, j 
A and B (9.6...n .3) 
1910.512 
•529 
259!62 
260.17 
I92"oo 
192.21 
1910.52 
259.89 
192.10 
Bradley 2669 (6.8.. 
.10.8) 
R. A. 20* 1 34 m 
7 s Decl. + io° 49' 
1908.383 
8?35 
192"30 
.422 
8.10 
192.39 
• 425 
8.13 
192.31 
1908.41 
8.19 
192.33 
For comparison we have : 
1886.79 
8?77 
I94"64 
2n 
Eng 
1894.13 
8-43 
i94.5o 
3n 
Eng 
1908.41 
8.19 
192.33 
3 n 
P 
These positions are not entirely consistent. Comparing the 
last with a mean of the first two, the proper motion of the 
large star is: 
o"ii4 in 352?2 
The meridian observations give : 
Auwers o'(i30 in 39^5 
Porter 0.090 in 360.0 
Lalande 39956 ( 6 . 5 ...II. 6 ) 
R. A. 20 h 35 m 20 s Decl. +19 0 30' 
I909.S5I 
24 °72 
98'.'95 
• 573 
24-73 
98.94 
.589 
24.42 
98.51 
1909.57 
24.62 
98.80 
No other measures. The proper motion has been found: 
Paris 0^383 in 32(6 
Porter 0.387 in 26.0 
75 Draconis (5.O...10.5) 
R. A. 20” 35 m 43 s Decl.+ 8i°5' 
A and B 
1908.383 
.403 
.422 
I3°78 
13-05 
13.48 
109758 
109.56 
109.38 
1908.40 
13-44 
109.51 
A and C (6.5) 
1908.383 
284?48 
i97"93 
• 403 
284.45 
197.64 
.422 
284.20 
197-81 
1908.40 
284.38 
197.79 
No other measures of B, and only this of AC: 
1884.31 285727 i98'.'42 211 H2 
The proper motion of 75 Draconis is 
small and uncertain: 
Auwers 
o"o22 in 
I05?8 
Boss 
0.031 in 
65-4 
C is Bradley 2701, and 
motion of 07042 in 90°. 
according to 
Auwers has a proper 
74 Draconis (6.0. . 
•7-5) 
R. A. 20 h 36'” 
20 s Decl. + 8o° 40' 
A and B 
1908.252 
3§?20 
214^19 
• 370 
38.43 
214.44 
■383 
38.05 
214.68 
1908.33 
38.23 
214.44 
B and C (10.7) 
1908.252 
306?23 
107731 
• 370 
306.75 
107.26 
• 383 
306.50 
107.21 
1908.33 
306.49 
107.26 
The relative motion should be accurately known from these 
measures: 
1851.87 40! 12 
2I4"29 
in 02 
1884.32 39.30 
214-93 
2n H2 
1908.33 38.23 
214.44 
3n P 
These positions give for the apparent movement of the larger 
star: 
o'.'i24 in I3i?2 
The proper motion of 74 Draconis is given from meridian 
observations: 
Auwers 
07217 
in 
i6?7 
Groombridge 
0.231 
in 
26.2 
Porter 
0.208 
in 
17.4 
Assuming the last value to be correct, the real proper motion 
of the smaller star is : 
o" 28 i in 3S3?7 
For an independent determination of this hereafter, I have 
connected a third star. 
A more recent determination of the proper motion of A is: 
Boss o"22 7 in i8?3 
S Delphini (Var. . .8.2) 
R. A. 20 h 37™ 33 s Decl. + 16 0 39' 
1909.304 341-20 55'-92 
.378 341-46 55-62 
■ 381 341.33 _ 55-9Q 
I909.35 341-33 55.8 i 
These stars are respectively DM (16°) 4351 and 4350. The 
first is variable from 8.5 m to 12 m. At the time of these 
measures, the components were sensibly equal. Neither seems 
to have any proper motion. The measure of 1879 is corrected 
for an error of 180° in the angle. 
1870 342? 1 57" 1 A. G. Ber. 
1879-63 341-67 55.88 2n B1 
