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Wikipedia has a star chart for Monoceros with 5 Greek lettered stars, but in my astronomy book there is also ε above β as if forming a 3rd corner in a triangle (β, δ, ε):

According to Allen none of these 6 stars have been given a proper name.

γ 06h 14m 51.34s 06h 14.856m 94.5
ε 06h 23m 46.10s 06h 23.768m 96.7
β 06h 28m 49.07s 06h 28.818m 98.0
δ 07h 11m 51.86s 07h 11.864m 108.9
Procyon 07h 39m 18.54s 07h 39.309m 115.9
α 07h 41m 14.88s 07h 41.248m 116.4
ζ 08h 08m 35.66s 08h 08.594m 123.3

The distance from α Monocerotis to φ Sagittarii was 284.0 - 115.4 = 168.1 days (not 169 days). Or perhaps more relevant, α Monocerotis was precisely 104 (= 8 * 13) days beyond η Andromedae, which rose with the Sun in April 1 (91).

91 (η Andromedae) + 104 = 195 (July 14):

January 11 12 (377) 13 14
Cb4-17 (480) Cb4-18 Cb4-19 Cb4-20
erua marama tagata noho i to mea kua vaha
no star listed ε Sagittae (297.1) Sham (297.7), β Sagittae (298.0) Tarazed (299.3)
July 13 14 15 (196) 16
no star listed Markab Puppis (114.7), Procyon (114.9), α Monocerotis (115.4) σ Gemini (115.7), Pollux (116.2) Azmidiske (117.4)

By counting from April 17 (107) at Cb1-1 to July 14 (195) we can deduce the glyph number should be 393 + (195 - 107) = 481 counted from Ca1-1. This is Cb4-18.

Counting separately for the other side of the sky, where Cb1-1 probably represented October 16 (289), means finding day 289 + (195 - 107) = 377 = 365 + 12 at Cb4-18.

Nash, the Arrowhead, rose heliacally in December 20 (354) and Sham, α Sagittae (the Arrow) rose 378 - 354 = 24 days later. Which was a time inside the South Dipper:

1 Horn α Virginis (Spica) Crocodile (202.7) Oct 10 (283) 283 = 265 + 18
2 Neck κ Virginis Dragon (214.8) Oct 22 (295) 295 = 283 + 12
3 Root α Librae (Zuben Elgenubi) Badger (224.2) Oct 31 (304) 304 = 295 + 9
4 Room π Scorpii (Vrischika) Hare (241.3) Nov 17 (321) 321 = 304 + 17
5 Heart σ Scorpii Fox (247.0) Nov 23 (327) 327 = 321 + 6
6 Tail μ Scorpii (Denebakrab) Tiger (254.7) Dec 1 (335) 335 = 327 + 8
7 Winnowing Basket γ Sagittarii (Nash) Leopard (273.7) Dec 20 (354) 354 = 335 + 19
December solstice
8 South Dipper φ Sagittarii (?) Unicorn (284.0) Dec 30 (364) 364 = 354 + 10
9 Ox / Herd Boy β Capricornii (Dabih) Buffalo (308.0) Jan 23 (388) 388 = 364 + 24

The synodic cycle of Saturn is 378 days and in rongorongo times heliacal Sham rose 378 days after the previous January 1.

Before we will look at where Sham is in the text we should try with one more animal (in addition to the Unicorn). The Hare could refer to Lepus and we can count 169 (or 168) days backwards from Vrischika, which rose with the Sun in November 17 (321).

321 - 169 = 152 (June 1) = RA day 152 - 80 = 72 (= 360 / 5). This was March 13 (8 days before equinox).

However, the first (ε) of my listed stars in Lepus was not rising until RA day 76.

Egyptian jubilation Phoenician he Greek epsilon Ε (ε)

Wikipedia points at the Egyptian gesture with arms raised high as a Sign of jubilation, which may have been the origin (via Phoenician he) of epsilon.

And Arneb (α Leporis) was not rising until in RA day 83.

321 (November 17) - 80 - 83 (Arneb) = 158. Possibly the Chinese had a Hare constellation which was rising somewhat later than Lepus.

The Fox could refer to Vulpecula. There is only one Greek lettered star in the constellation, viz. α at the left ear of the Fox (according to Hevelius who created it):

 
α Vulpeculae 19h 28m 42.41s 19h 28.707m 295.9
Sham 19h 40m 05.78s 19h 40.096m 298.8

σ Scorpii (247.0) - 294.9 (α Vulpeculae) = - 47.9. This Fox star rose in January 10 (= 375 = 295 + 80).

But there was a more famous Fox, viz. Alcor (80 Ursae Majoris).

σ Scorpii (247.0) - 202.7 (Alcor) = 44.3. Then we could count 365¼ - 44.3 = 320.95 or ca 321. Possibly this number alludes to the Hare referred to as the animal of Vrischika, which star was rising with the Sun in November 17 (321).

The lunar station connected with the Fox was Heart. Why was not Antares (Kalb al Akraab, the Heart of Scorpio, α) chosen instead of a nameless star?