Blinking snake

The A Glyphs of the Lunar Supplementary Series

Constellation band

Glyph A of the Lunar Series indicates the overall length of the lunation; Glyph A9 is used for a 29-day lunation, while Glyph A10 is used when it is considered to be a 30-day lunation.

Since the length of the lunar synodic month is about 29.530588 days, the Maya must have used some (or several) patterns of 29- and 30-day months. The choice of pattern has a great deal to do with tracking eclipse semesters, and Lounsbury (1978) covers this aspect of the A Glyphs in great detail. For a long time, everyone thought that Glyph C denoted eclipse semesters, but it has since turned out that C follows an independent, 18-lunation cycle unrelated to eclipse nodes. Eclipse semesters are usually 177, 177 and 148, or some close approximation thereof, while the C Glyphs show 6-lunation “semesters” of 179-180 days in length across the board. Refer to Schele, Grube and Fahsen, and to my C Glyph page for more information about the C Glyph cycle, which is also related to the X Glyphs.

A9
Indicating a 29-Day Lunation
Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9
Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9
Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9
Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9
Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A9 Glyph A
A10
Indicating a 30-Day Lunation
Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10
Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10
Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10
Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10
Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10
Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10 Glyph A10

References

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