THE HONGKONG GOVERNMENT GAZETTE, 4TH MARCH, 1882.
229
Right Ascension, s the variation of p in 100 years, q the star's Annual Proper Motion in Right Ascension, n the number of years elapsed, and e the small correction from the Table at page 5 of the Introduction to the Catalogue,
-10, and the formula becomes,
In this case, n
+ C
Mean R.A., 1882, January 1 A+ 10 (p + q) + $ Similarly, I have computed the Mean North Polar Distances by the formula,
Mean N.P.D., 1882, January 1D + 10 (p' + q) +
2
+ c
where is the small correction from the Table at page 27 of the Introduction to the Catalogue.
Forty-eight stars, formed into 28 pairs, were used in the determination, each pair having been observed from one to five times. The average is two times for each pair, making 56 determinations, on eleven nights in January and February. Of these it has only been necessary to reject two as imperfect. The following Table exhibits, for each star, in Column I its name as taken from the Greenwich Nine-Year Catalogue for 1872; in Column II its number in that Catalogue; in Column III its number in the British Association Catalogue; in Column IV its Mean Right Ascension for 1882, January 1. computed as above; and in Column VI its computed Mean North Polar Distance for the same date. Columns V and VII show the number of observations at Greenwich, of Right Ascension and North Polar Distance respectively, in the Nine-Year period 1868 to 1876, which were combined to form the Mean Places given in the Catalogue for 1872, January 1.
TABLE I.
COMPUTED MEAN PLACES OF STARS FOR 1882, JANUARY 1.
Number in
Star's Name.
Greenwich Nine-Year
Number in
B. A. C.
Mean R. A., 1882, January 1.
Catalogue
No. of Obs. of R. A.
for 1872.
Mean N. P. D., 1882, January 1.
No. of Obs. of
N. P. D.
h. m.
о
#!
$.
53 Andromeda
154
502
1 33 37.187
5
50
1 16.47
Piazzi I. 142.
157
510
1 34 36.340
5
47 58 43.94
106 Piscium
111 Piscium
160
518
I 35 17.410
101
85 6 36.40
175
574
1 47 26.777
87 23 44.50
57 Andromeda
190
628
1 56 89.541
28
48
14 13.86
No Dat
10
41
27
24 Arietis
216
745
2 18 29.565
79 55 28.58
Bradley 341
201
755
2 20
24.917
79 58 1.05
15 Trianguli
230
786
2 28 37.272
49 41.01
8
40 Arietis
258
867
41 55.189
12 31.10
3
41 Arietis
201
872
2 43 2.338
13 37.28
14
45 Arietis
268
901
49
10.732
Arietis
207
999
8
7.192
63 Arietis
311
1045
3 15 57.815
64 Arietis
313
1052
3 17 20.433
Tauri
325
1087
3 24 21.540
38 Persei
340
1138
3 36 55.159
52 Tauri..
398
1326
61 Tauri
403
1346
13 6.000
16 7.792
75 Tauri
418
1377
4 21 41.675
Bradley 619
422
1391
4 23 48.471
Piazzi IV. 111
427
1408
27 15.083
87 Tauri
429
1420
29 8.995
106
89 Tauri
433
1432
31
24.271
92 Tauri
480
1437
32 31.606
Piazzi IV. 148
410
1444
4 33 56.656
11 Aurige..
482
1602
5 5 21.264
24 Orionis
507
1687
5 18 48.100
119 Tauri
125 Tauri
519
1726
5 25 17.702
534
1778
32 25.422
182 Tauri
551
1837
5 41 46.444
54 Orionis
562
1876
5 47 23.721
58 Orionis
566
1883
5 48 46.976
37 Auriga
571
1900
5 51 40.402
67 Orionis
587
1958
6 0 50.079
70 Orionis
594
1990
6 5 14.020
44 Aurige...
601
2001
48 Auriga...
620
2082
6 7 51.473
6 20 58.950
49 Auriga..
635
2133
6 27 46.158
24 Geminorum
645
2183
6 30
53.625
54 Geminorum
706
2398
7 11 18.701
60 Geminorum
724
2442
7 18 23.804
72 Geminorum
733
2469
7 22 28.322
68 Geminorum
737
2486
7 26 52.352
78 Geminorum
760
2555
7 38
83 Geminorum
774
2617
5.616 7 46 16.463
115
3 Cancri....
782
2659
7 54 1.538
9 Cancri...
790
2700
7 59 18.628
10 Caneri.
792
2714
8
0 49.111
OHO~Gao on or 8 + 15 co - SaSavaaraawang coco ~ ∞
8 50.83
8
23 38.09
14
69 40
50.94
3
65
41
42,30
11
77
28
7.72
15
58 5 12.40
62 55 58.43.
72 41
78 54 19.55
7.85
74
3 50.87
61 17 13.94
73 43 45.02
74 12 16.47
74
19
1.76
61
36 54.37
51 39 24.90
17
83
45 31.32
71 29 42.01
64
10 13.96 05 28 24.69
69 44 59.25
89
82 36 58.51
Coordoneaar vo co H
14
52 47 50.85
61
75 13 7.00
75 45 58.55
60 27 36.25 59 26
8.75
53 13.65 73 30 4.99
73 14 53.45
61 58 7.68
34
61 50 31.00 73 55 15.25
61
41 24.82
107
62 55 48.64
72 22 10.12
67 1 43.54
68
4 36.36
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