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Trying to improve on my presentations of the text I decided to eliminate the Gregorian dates which 'were close to the Full Moon' in rongorongo times. These dates were not visible in the night sky. But the stars were:

January 10 11 12 (377) 13 14
Cb11-17 Cb11-18 (662) Cb11-19 Cb11-20 Cb11-21 (273)
e ika tagata - henua hikihiki te inoino - ka hoi ia ku hurihia mai te tagata tagata iri
α Vulpeculae (294.9), Albireo (295.5) no star listed ε Sagittae (297.1) Sham (297.8), β Sagittae (298.0) Tarazed (299.3)
Ghost-23 Al Dhirā'-5 / Punarvasu-7 no star listed Markab Puppis (114.7), Procyon (114.9), α Monocerotis (115.4) σ Gemini (115.7), Pollux (116.2)
Gomeisa (111.6), ρ GEMINI (112.1) CASTOR (113.4)
January 15 16 17 18 19 (384)
Cb11-22 (666) Cb12-1 Cb12-2 Cb12-3 (277) Cb12-4
ki te vage Rei Te nuku te ua te ika te henua ma te hua
Sravana-23 ι Sagittarii (301.2), Terebellum (301.3) Alshain (301.6), ε Pavonis, θ Sagittarii (302.3). γ Sagittae (302.5) μ Pavonis (302.7) η Sagittae (304.2), δ Pavonis (304.4)
δ Sagittae (299.6), ζ Sagittae (300.1), ALTAIR (300.3)
Azmidiske (117.4) no stars listed Drus (119.9) Naos (121.3)

A minor problem is the fact that the nakshatra stars above are distributed according to my rule of adding 183 days to the heliacal days, when in principle the distance instead should be 365¼ / 2 = 182.625 days. The difference between 183 and 182.625 is 0.375 or 3 / 8 of a day.

 
The complex glyph Cb11-18 is probably meant to draw attention and I guess the 'antipodal' Castor was here in the mind of the creator of the text. But then I felt the necessity to once again insert the dates which I just had eliminated. Without them there is no stability.
 
But these dates should be put close to the heliacal dates and not at the stars close to the Full Moon.

Cb11-18 (662) - 392 = 270 counted from Cb1-1.

The last glyph on side a should be at September 21 (264) + 391 = day 655 = day 290 (October 17). But in a leap year it should be at October 16.

If October 16 in a leap year corresponds to RA day 209 as in an ordinary year, then the first glyph on side b should also be at RA day 209.

209 + 269 =  RA day 478 = approximately RA day 478 - 365 = 113 = Gregorian day 193 (July 12):

 
January 10 11 12 (377) 13 14
July 11 12 (193) 13 14 15
Cb11-17 Cb11-18 (662) Cb11-19 Cb11-20 Cb11-21 (273)
e ika tagata - henua hikihiki te inoino - ka hoi ia ku hurihia mai te tagata tagata iri
α Vulpeculae (294.9), Albireo (295.5) no star listed ε Sagittae (297.1) Sham (297.8), β Sagittae (298.0) Tarazed (299.3)
Ghost-23 Al Dhirā'-5 / Punarvasu-7 no star listed Markab Puppis (114.7), Procyon (114.9), α Monocerotis (115.4) σ Gemini (115.7), Pollux (116.2)
Gomeisa (111.6), ρ GEMINI (112.1) CASTOR (113.4)
January 15 16 17 18 19 (384)
July 16 17 18 19 (200) 20
Cb11-22 (666) Cb12-1 Cb12-2 Cb12-3 (277) Cb12-4
ki te vage Rei Te nuku te ua te ika te henua ma te hua
Sravana-23 ι Sagittarii (301.2), Terebellum (301.3) Alshain (301.6), ε Pavonis, θ Sagittarii (302.3). γ Sagittae (302.5) μ Pavonis (302.7) 20h (304.4)
δ Sagittae (299.6), ζ Sagittae (300.1), ALTAIR (300.3) η Sagittae (304.2), δ Pavonis (304.4)
Azmidiske (117.4) no stars listed Drus (119.9) Naos (121.3)
Betelgeuze (394)

Antares culminated in July 11, but I should not put in such an interesting item in my description of early January above. There is no trace of Antares close to the Full Moon in January and if I should insert culmination data, then they should contain stars which in rongorongo times rose with the Sun in early June, e.g. Rigel (78.1) in June 7 (158).

I have not so far noted Rigel in my table of midnight culminations, because Allen does not offer this information. For Capella, though, I could have inserted its culmination date as January 19, but instead I have chosen to mention Betelgeuze (88.3).

How is it possible to have both Rigel and Betelgeuze culminating in January 19 when they rose with the Sun 10 days apart?

If the text is here alluding to the culmination of Antares then it should be at Cb1-11 and not at Cb1-12:

Antares at the time of rongorongo:
Rising in the east at sunset  June 1 (152) 0 0
15 days from winter solstice July 6 (187) 35 35
Culmination at midnight July 11 (192) 5 40
'Leap day'

July 12 (193)

1 41
Heliacal rising November 25 (329) 136 177
Nakshatra day May 28 (148) 184 361