RA distances
Atlas - Castor	58 days	227 (π)	355	365
'July 13 (194)
Procyon - Vega	168 days
- Altair	18 days	128
- Menkar	110 days
- Atlas	10 days

Presumably the table is only an outline of a more sophisticated structure. For instance are there 100 days from Procyon to Arctururs.

12 * 29½ = 354 suggests there could be an extra day among those 355 from Atlas up to and including Menkar, the star at the nose (i.e. terminal point) of Cetus. Hevelius has time running towards the right:

In 4700 BC the foot of Castor was at spring equinox, where time would be 'broken', where one year was terminated and the next would begin. If each twin represented half a year, then Castor had to die every spring.

Ab1-37 (where 1-37 could allude to Sheratan 1, day 137 in the Gregorian calendar) probably illustrates how a birth comes after the old period has gone away. The ihe tau sign at left in the glyph is broken (the outline has a gap at left), which should mean life has returned. This is my summary page for ihe tau in my preliminary glyph type dictionary:

The glyph type ihe tau appears at the close of calendars, or at the end of main sections of calendars. The picture is that of a moon crescent broken in half, which conveys suggestions of a time when growing no longer continues - i.e. a state of death. If ihe tau is reversed, it becomes a sign of birth, as at right in Ab1-37: South of the equator the crescent of a waxing moon looks reversed as compared to how it is seen north of the equator. Therefore the half moon in ihe tau represents half a waning moon. In Ca7-27, beyond full moon in the Mamari moon calendar, an unusual variant of marama (moon) describes waning moon as a waxing moon crescent turned around 180º: The light part has become the bottom and the dark (hatchmarked) part has come to the top. The glyph presumably illustrates how the waxing moon has 'broken'.