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Sirius and Sheratan
In yellow : the ecliptic, the celestial equator and the vernal equinox.
In green : the name of the constellations and their actual limits.
In mauve : the name of the most shining stars and the outline of the constellations as it is most often represented on the actual maps.
In light blue : the horizon, the cardinal points, the meridian and the zenith.
The graph above shows the rising of Sirius. The azimuth and the position of the celestial equator are typical of the time. A part of the Egyptian pantheon is here : Sirius stands for Isis, Orion (the Hunter) and Gemini (the Twins) are respectively linked to Osiris and Horus. At the same time, the spectacle represented on the inferior picture can be watched towards the South.
Sheratan crosses the meridian and Aries (the Ram) holds, in the sky, a position that reminds the observer (standing at point C) that of the terrestrial projection. Indeed, for the observer, the projection of Sheratan is on the geographical meridian whereas Hamal-bis and 41-bis are seen on its left (points D, G and B on the graph of the site).
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