Burnham: Measures of Proper Motion Stars 
The proper motion of A 
from these measures, and from 
4995. 
FI 2491. (11.1.. 
.11.2) 
meridian positions is: 
Measures (AC) 
1 "667 
in 247?8 
R. A. 9” 
9 m 21 s Decl. + 35 0 1' 
Stumpe 
1.668 
in 247.3 
1912.066 
202 ?o 
15-37 
Paris 
Porter 
A. G. Flarv. 
1.670 
1.702 
1.711 
in 249.2 
in 248.9 
in 249.1 
.197 
200.6 
15-03 
1912.13 
201.3 
15.20 
Disagrees with IPs 
estimated angle; 
nothing 
4984. 0 Hydrae. 
FI 2489. 
(4.0...10.6) 
About 5' sp H 2491 is h 572; faint and round. 
R. A. 9 h 8 m 8 s 
Decl. + 2° 49' 
4999. 
2 1329- (8.3.. 
- 8 - 5 ) 
1910.931 
11.107 
i8i?28 
181.84 
42 " 3 i 
41.89 
R. A. 9" 
9 m 37 s Decl. — 
-o° 44' 
11.142 
181.68 
42.65 
A and B 
11.162 
181.37 
42.25 
1910.931 
25o?5 
i8'.'78 
1911.09 
181.54 
42.28 
11.107 
250.4 
18.89 
The proper motion of 9 Hydrae from some of the meridian 
positions is too small. From all the measures of B (1853-1911) 
we have: 
in 153-4 
o "382 
From meridian positions: 
Auwers 
Newcomb 
Boss (G. C.) 
o"3i8 in i59?o 
0.339 in 156.9 
0.338 in 157.3 
11.164 
250.2 
19.23 
1911.07 
250.4 
18.97 
From the measures of AB (1834-1903) one of these stars has 
some proper motion. The apparent motion of A, considering 
B as stationary, is : 
o"io8 in 2i6?o 
The only value found from the catalogues is: 
A. G. Nico. o"o9 in 180° 
4986. 
H 1165. (8.3.. 
.12.0) 
R. A. 9 h 
8 m 26 s Decl. + 45 0 26' 
1907.140 
II 7-5 
25"57 
9.109 
116.8 
25-53 
9.164 
116.2 
25-57 
1908.47 
116.8 
25-56 
To show whether or not B has any motion, I have connected 
a faint star. 
A and C (12.5) 
1910.931 
ioi?78 
i 57"56 
11.164 
101.63 
156.56 
11.184 
101.25 
158.17 
11.200 
101.28 
156.87 
1911.12 
IOI.48 
157-29 
No other measures, h 563 which is on the same parallel, and 
about 4 m p H 1165, is too diffused for accurate comparison 
with any star in the field. 
5000. H 2492. (10.8...neb.) 
R. A. 9" io in 6 s Decl. + 53 0 1' 
4993. Weisse 21. (7.7...8.9) 
R. A. 9" 9 m I s 
Decl. - 
-8° 16' 
I 907 -I 97 
14-4 
25-90 
7-997 
14-3 
25-95 
8.249 
14-3 
25-87 
H 2492 and h 574 
1909.780 i20?o i5"94 
Herschel refers to FI 2492 as “a double object composed of 
a star and a very faint nebula with stellar center The latter 
is h 574. It is a little brighter in the middle, but too indefinite 
for accurate measures. 
1907.81 14.3 25.91 
No change since 1880. 
H 2492 (star) and DM (53 0 ) 1328 
1909.780 I27?9 239''o 
4994. 02 198 rej. (8.0. ..12.5) 
R. A. 9" 9 m 17 s Decl. + 23 0 54' 
1907.022 i57?2 i4"95 
.102 157-2 14.62 
.137 158.0 14.59 
1907.09 157.5 14-72 
Change in angle and distance from the proper motion of A. 
The measures should be continued after the proper time 
interval. 
5003. 2 1332. (7.2...7.5) 
R. A. 9 h io m 24 s Decl. + 24 0 9' 
1908.974 
9.071 
23 °2 
22.4 
5 "67 
5.80 
1909.02 
22.8 
5-73 
1911.162 
23°2 
5 ”90 
.164 
22.9 
5-72 
.181 
21.6 
5-67 
1911.17 
22.6 
5-76 
163 
