vi 
Note. —Although these Azimuth Tables are termed “ Tables of the Sun’s true Bearing or 
Azimuth,” they may, notwithstanding, be made available for determining the true bearing 
of the moon, planets, and stars when the declination of those bodies ranges between 23° N. 
and 23° S. 
The following is a table of positions of bright stars included within that range of 
declination for 1st January 1894 :— 
Stars. 
Mag. 
R.A. 
Annual 
Variation. 
Declination. 
Annual 
Variation. 
a Arietis 
2 
h m seo 
2 1 12 
sec 
+ 3-4 
o in 
N. 22 57 39 
+17-2 
a Tauri ( Aldebaran ) - 
1 
4 29 50 
+ 3-4 
N. 16 17 45 
+ 7*6 
ß Orionis (. 'Rigel ) 
1 
5 9 26 
+ 2-9 
S. 8 19 28 
+ 4-4 
a Orionis ( Betelguese ) - 
Var. 
5 49 26 
+ 3-2 
N. 7 23 13 
+ 1-0 
a Canis Major {Sirius) 
1 
6 40 28 
+ 2-6 
S. 16 34 18 
— 4-7 
a Canis Minor ( Procyon ) 
1 
7 33 45 
+ 3-1 
N. 5 29 48 
— 9-0 
a Leonis ( 'Regulus ) 
1-2 
10 2 44 
+ 3-2 
N. 12 29 6 
— 17-5 
ß Leonis ( Denebola ) - 
2 
11 43 39 
+ 3-1 
N. 15 9 52 
—20-1 
a Virginis {Sjrica) 
1 
13 19 36 
+ 3-2 
S. 10 36 29 
—18-9 
a Bootis {Arcturus) - 
1 
14 10 50 
+ 2-7 
N. 19 44 4 
—18-8 
a Aquilae {Altair) 
1-2 
19 45 37 
+ 2-9 
N. 8 35 18 
+ 9-3 
• a Pegasi {Markab) 
2 
22 59 29 
+ 3-0 
N. 14 38 5 
+19-3 
In order to find the hour angle of the star or its distance from the meridian (which 
in the Azimuth Tables is under the head Apparent Time p.m.) the following rule may be 
adopted :— 
Add the apparent time at ship (expressed astronomically, that is to say, reckoning from 
the preceding noon) to the Sun’s R.A., which for this purpose may be estimated with 
sufficient accuracy from the Nautical Almanac by inspection, and from the sum, which is 
sidereal time or the R.A. of the meridian (increased, if necessary, by 24 hours), subtract 
the R.A. of the star, the remainder will be the star’s hour angle W. of meridian. If the 
remainder be more than 12 hours, take it from 24 hours, and the result will be the hour 
angle E. of meridian ; should the remainder be more than 24 hours reject 24 hours, and the 
result will be the hour angle W. of meridian. 
In the above rule it is assumed that apparent time at ship is known ; but should the hour 
angle have to be determined by mean time deduced from a chronometer the rule would run 
thus 1st, To the time shown by chronometer apply its error and accumulated rate, the 
result will be Greenwich mean time, to which apply the longitude in time, adding it to the 
Greenwich mean time if the longitude be east, and subtracting it if the longitude be west ; 
the result will be mean time at ship. 2nd, Take from the Nautical Almanac (page ir. for 
the month) sidereal time at mean noon, and correct it for acceleration to the Greenwich 
mean time by the table for the purpose in the Nautical Almanac (page 490). 3rd, Add 
together mean time at ship and the corrected sidereal time ; from the sum, increased if 
necessary by 24 hours, subtract the R.A. of the star, the remainder will be the star’s hour 
angle W. of meridian ; if the remainder be greater than 12 hours, take it from 24 hours, 
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