Stonehenge and Other British Stone Monuments Astronomically Considered

by Sir Norman Lockyer

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Fig. 33.—Diagram for finding declination from given amplitudes or azimuths in British latitudes.

Curves represent (from top) Lat. 49°, 51°, 53°, 55°, 57° and 59°.

I also give other diagrams showing the changing declinations of the brightest stars, those which would naturally be observed, between the years 150 A.D. and 2150 B.C. These have been plotted from the calculations of the authorities I have named.

[Fig. 34] deals with the Northern stars. The stars are numbered as follows:—

Number.	Name of star.
1	β Ursae Minoris.
2	α Ursae Minoris (Polaris).
3	α Draconis.
4	α Ursae Majoris (Dubhe).
5	γ Ursae Majoris.
6	η Ursae Majoris (Benetnasch).
7	γ Draconis.
8	β Cassiopeiae.
9	α Cassiopeiae.
10	α Persei.
11	α Aurigae (Capella).
12	α Cygni.
13	α Lyrae (Vega).
14	α Coronae.
15	α Geminorum (Castor).
16	β Geminorum (Pollux).
17	α Boötes (Arcturus).
18	β Leonis.
19	α Leonis (Regulus).
20	α Andromedae.
21	η Tauri (Alcyone).
22	α Tauri (Aldebaran).
23	α Canis Minoris (Procyon).
24	α Aquilae.
25	α Orionis (Betelgeuse).
26	α Virginis (Spica).

On [Fig. 35], dealing with the Southern stars, the names are given along the curves.

Now supposing that we have our plans; that we have determined the azimuth of the sight lines; and have found the declination of the star observed; we may find more than one star occupying that declination at various dates.

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