[Aztlan] the number 520

[martha noyes]

Aloha all

I've got several sets of numbers in this myth I've been working on.  One set comes to 2,880, no problem with that one - eight years.  There's also 260, which in this tale is clearly, but not necessarily exclusively, meant as a period of Venus's visibility.  The third one is the problem - it's 520.

There are enough similarities in astronomy between cultures that I thought I'd ask what 520 might represent in Mesoamerican understanding.

Please send your responses to me off-list.

Mahalo,
Martha