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2 The Gemini constellation covers a month and is located with 07h (420m) at its center. We can see that Castor and Pollux belong in the 2nd part, the 2nd half-month:
Only χ stands out in being in the 9th hour. We remember a similar late position for χ² and χ¹ Orionis and how at the other end, at the beginning of Orion, there were π stars:
Allen about χ Gemini: "χ, a 4th magnitude, with α Cancri, was the Chinese Tseih Tsing, Piled-up Fuel." Wasat is the delta star and it marks where the ecliptic goes through Gemini: "Wasat, and Wesat are from Al Wasat, the Middle, i.e. of the constellation; but some have referred this to the position of the star very near to the ecliptic, the central circle." (Allen) A quick look at Orion reveals its δ (Mintaka) evidently can be used to mark the 0º declination line. Wasat is not close to 07h (the central right ascension line for Gemini) but Mintaka is in the center of the 'hem' (as I have coined the phenomenon in order help my memory):
As a capital letter delta is like the silhouette of a pyramid, Δ. Maybe this sign has been used inversed at center bottom in Ga1-18. |
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