2
HIND.—ASTRONOMICAL DATA.
In the case of the eclipse of 1876, March 25, the computationis then as follows :—
Constantsin l
-0-19595+ 9-99570-0-19165
No. -1-55472
Constantcos /cos A
No.
Constant
+ 9-95510+ 9•14633+ 9-96181+ 9-06324
A
Constant
A
60
36
6-0
19-4
- 23 40-6
+ 0+ 1
11567
11253
Constantsin a)
-3-57030+ 9-97552— 3" 54582No. —3514- 2 s
COS 03
or log. cos u
03
Constantsin l
No.
= 109
at first contact. J '
+ 1-22820
A
- 60 0-0
-1-55472
Constant
-150 2-0
-0-32652
B
-210 2-0
-9-51391
1
9
i +109° 3-5'+ 3-52333
Constant
-3-76690
+ 9-99570
cos /
+ 9-14633
+ 3-51903
cosB
-9-93738
+ 3303-9 8
+ 2-85061
No.
+ 708-9 s
/
4
+ 3303-9
+ 4012-8
45
- 3514-2
49
+ 498-6
or
H. M. S.
+ 8 19
Constant
8 3 50
Subtract Long.
8 12 9
4 0 0
.1 time of commencement
4 12 9
which agrees with the direct calculation.
OCCULTATIONS.
The list appended includes those stars of the Nautical Almanaccatalogue, which may possibly be occulted in 82° of north lati-tude ; but in order to ascertain with certainty whether any staris occulted, and the circumstances of the occultation, supposingthe position of the point where the observation is to be madeapproximately known, the formulae given at p. 134 of Appendices ,&c., cited above, may be employed. An example of the applica-tion of these formulae for Greenwich is given at p. 145 ; but tofurther illustrate the method of computation, the occultation ofthe planet Mars 1876, January 31, is here calculated for longi-tude 4 h West, latitude 82°.
The following are the circumstances for this position of theprincipal occultations visible in 1876 and 1877.
Immersion.
Emersion.
H.
M.
o
H.
M.
O
Mars -
1876,
Jan. 30-31
23
36
86
0
28
333
Venus -
99
Oct. 13
4
4
12
4
40
294
Regulus
99
Dec. 6
1
57
50
2
47
262
99
1877,
Jan. 2
9
52
70
10
46
240
99
99
Jan. 29
21
22
141
21
35
169
99
99
Feb. 26
8
10
95
8
57
214
The above are local mean times, and the angles from N. pointare reckoned as usual in the Nautical Almanac.
Nautical Almanac Office, Hind.
1875, February 10.