5. The right ascension day of Alterf is interesting. It could cast light on the otherwise rather curious distribution of glyphs on the G tablet, with 230 + 242 = 472 (= 236 + 236):

Gb1-1 (231) Gb1-2 Gb1-3 Gb1-4 Gb1-5 Gb1-6 (236)

Alterf is rising 35 days earlier than Denebola:

33
Ga3-20 Ga5-3 Ga5-4 (**87) Ga5-5 (*180)
Alterf (144.4)   93 Leonis (179.0), Denebola (179.3) Alaraph (179.6), Phekda (180.3)
August 12 September 15 16 17

The relationship between the 'tail of the lion' and spring equinox south of the equator seems rather clear. From this we can reflect on day 266 as another possible Sign of equinox:

South of the equator North of the equator
autumn equinox 266 89 = 266 - 177 spring equinox 80 (89)
Achird 266 + 11.7 = 277.7 92 = 358 - 266 Achird 89 + 11.7 = 100.7
winter solstice 358 = 266 +172 - 80 summer solstice 172 (181)
Sun returns (Naos) 23 (*122) = 87 - 64 87 Sun leaves (Naos) 202 (211)
Alterf 52 Alterf 240 = 211 + 29
Achir (Regulus) 266 + 153.7 - 358 = 61.7 Achir (Regulus) 89 + 153.7 = 242.7
Alkes 75 = 266 + 167 - 358 Alkes 256 = 89 + 167
spring equinox (Denebola) 87 = 358 + (266 - 172) - 365 autumn equinox (Denebola) 266 (275)
summer solstice 177 = 87 + (356 - 266) 90 = 177 - 87 winter solstice 356 (365)
Sun leaves (Altair) 202 (*301) = 23 + 179   Sun returns (Altair) 16 (25)

The conclusion is that Alterf in a way corresponds to Gb1-1, because 266 (Gb2-10) = 231 + 35:

Gb2-9 Gb2-10 (266) Gb2-11 Gb2-12 Gb2-13
Gb2-14 Gb2-15 Gb2-16 Gb2-17 Gb2-18 (**246)

The figure in Gb2-18 is evidently the same as in Ga5-4 (and 472 - 158 = 314):

158
Ga5-4 (115) Gb2-18 (274)

We have earlier seen mago in Gb2-10 as a possible reference point for 'antipodal stars':

85
Gb2-10 (#0) Gb2-11 Gb2-12 Gb4-33 (354) Gb5-1 Gb5-2 (#90)
September 22 23 24 19 20 December 21
9 52
Gb5-12 (366) Gb7-8 (#153) Gb7-9 (##64) Gb7-10 (421)
January 1 23 February 24 25

Now we can try to let Alterf begin the sequence but then we have to change September 22 to September 16:

14
Gb1-1 (231) Gb1-2 Gb1-3 Gb1-4 Gb1-5 Gb1-6 (236)
August 12 13 14 15 16 17
14
Gb2-9 Gb2-10 (266) Gb2-11 Gb2-12
15 September 16 17 18
Gb2-13 Gb2-14 Gb2-15 Gb2-16 Gb2-17 Gb2-18 (274)
19 20 21 22 23 24

The extraordinary design in Gb2-16 makes it plausible it could be at September 22 instead of September 28 - I have seen no sign of September 28 as a cardinal point.

The 6 extra glyphs on side b could in some way have been motivated by the difference between September 22 and September 16.