Hevelius has presented Centaurus killing Lupus with his lance (vero)
and we can imagine the Wolf as a personification of the northern
winter.
 Today the Centaur arrives around 12h (autumn equinox) whereas 6500 years ago he would have arrived around 6h. 6h corresponds to RA day 91 (midsummer). Anciently the Sun was playing the part of Centaur at midsummer. A quarter later, at the September equinox, the Sun was like a Scorpion (8 legs and hiding from the daylight below ground):
The Scorpion and the Centaur are opposite in character. Regulus in the front part of Leo is today around 10h whereas Toliman at the front right hoof of the Centaur is around 15h. They are about 5h / 24h * 12 = 2½ months or around 75 days apart. 6500 years ago Regulus (the Little King) would have been the Sun around April 7 (97) because 172 (June 21) - 75 = 97. Although the Easter Island calendar may have been more true to the ancient structure and added 4 days to June 21 and reached June 25 (176) with Regulus at day 101 (April 11). South of the equator, where the seasons of the Sun are opposite to those north of the equator, the Centaur should at present be a figure indicating the arrival of spring, whereas 6500 years ago the Centaur would have been at the winter solstice:
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