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6. The feet of the Twins:

ν 06h 28m 57.79s 06h 28.963m 102.6
Alhena 06h 37m 42.70s 06h 37.712m

104.8

ξ 06h 45m 17.43s 06h 45.291m 106.7
Castor left Tejat Prior η Gemini 3.31 22° 31′ N 06h 12m 94.4
Tejat Posterior μ Gemini 2.87 22° 32′ N 06h 20m 96.4
right   ν Gemini 4.13 20° 13′ N 06h 45m 102.6
Pollux right Alhena γ Gemini 1.93 16° 27′ N 06h 53m 104.8
left Alzirr ξ Gemini 3.35 12° 54′ N 07h 01m 106.7

"ξ, a 4th-magnitude, was Al Bīrūnī's, Al Zirr, the Button." (Allen).

Ka2-19 Ka2-20 Ka2-21 (40) Ka2-22
ν Gemini (101.6), ψ6 Aurigae (101.7),  τ Puppis (102.2), ψ7 Aurigae (102.4)  ψ8 Aurigae (103.2) Alhena (103.8), ψ9 Aurigae (103.9) Adara (104.8), ω Gemini (105.4)
'July 1 '2 '3 '4 (185)
Al Tuwaibe' 6 7 8 9
Ka3-1 Ka3-2 Ka3-3 (*108) Ka3-4 Ka3-5 (46)
Alzirr (105.7), Muliphein (105.8) Wezen (107.1)     Wasat (109.8)
'July 5 '6 '7 '8 '9
Al Tuwaibe' 10 11 12 (52) 13 Heka 1

The name 'Button' for ξ Gemini at first seems quite irrational, but when a button appears it means the hole is closed and the gap in the garment no longer is open. But where is the hole? Of course it must be where the button is. And the button is very close to '7h, or should we not rather say where the fraction ¼ of a day has left a hole ¾ of a day wide.

If a New Year was beginning in 'July' and not in 'January, then the Julian year's fraction ¼ ought to be there too.

Muliphein is γ Canis Majoris, to the left of Sirius when we look towards the north: