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4. The 'twins' Tejat Prior (η) and Tejat Posterior (μ) have been mentioned briefly earlier (cfr at Eridu): ... Tejat Prior is from Al Tahāyī, an anatomical term of the Arabs by which it was known in early days; a name also applied to stars in the head of Orion ... ... Bassus and Hyginus said Tropus, Turn, referring to the apparent turningpoint of the sun's course at the summer solstice, which now is more precisely marked by the star y just eastward from η; and Flamsteed also had Τρόπος ... "It has the traditional names Tejat Prior, Propus and Praepes and Pish Pai (from the Persian Pīshpāy ... meaning foreleg)." (Wikipedia) On our star map the 'foreleg' is named Propus:
If we put midsummer at the border line between the 6th and the 7th right ascension hours then 6 / 24 * 365¼ = 91.3 indicates stars which rise earlier than those in Gemini:
Precession moves the cardinal points backwards among the constellations, therefore Tejat Prior and Tejat Posterior will be at midsummer ca (95.4 - 91.3) * 72 = 295 years in the future. But they will at all times indicate the position of Canopus. The head of Orion (at Heka) - also named Al Tahāyī - was at midsummer (91.3 + 408 - 492.2) * 72 = ca 500 years ago, and seems to have an important position in the G text:
When they built the great pyramids on the Gizah plateau Heka could not have been at summer solstice. The distance from around 2500 B.C. to the present indicates precession has moved the solstice slightly more than 2 months (4500 / 72 = 62.5). |
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