Hermetic Astrology on other planets

[Inky]

Originally Posted by Whitewings

Let me try again.

When casting a spell using Hermetic Astrology, the following modifiers can come into play:

1) Decanic correspondences. Straightforward, I see no reason these should change.
2) Zodiacal months, which are longer due to Mars' longer year. Straightforward.
3) Zodiacal correspondences, also straightforward. I see no reason they should change.
4) Planetary correspondences, including the day of the week. This is where I have problems. Do Mars-aligned correspondences even apply when you're actually on Mars? Mars opposes Venus, how does that affect the use of Venus-aligned correspondences when you're actually on Mars? What about correspondences with the other planets?

I'm looking for thoughts concerning #4.

Do any of these rules usually depend on where you are, e.g. sunrise being at a different time in Asia than in America?

[Whitewings]

Originally Posted by Inky

Do any of these rules usually depend on where you are, e.g. sunrise being at a different time in Asia than in America?

It's not specified, but personally I'd say day of the week would be determined by local time. Probably local sunrise to local sunrise.

[Astromancer]

Originally Posted by Whitewings

It's not specified, but personally I'd say day of the week would be determined by local time. Probably local sunrise to local sunrise.

Judicial Astrology dictated which hours of the day and night were ruled by which planet. It used the old separate hours of the day and night, with each sunrise being the first hour of the day. Sunday started with the hour of the Sun. Monday started with the hour of the Moon. Tuesday started with the hour of Mars. And so on throughout the week.

[whswhs]

Originally Posted by Astromancer

Judicial Astrology dictated which hours of the day and night were ruled by which planet. It used the old separate hours of the day and night, with each sunrise being the first hour of the day. Sunday started with the hour of the Sun. Monday started with the hour of the Moon. Tuesday started with the hour of Mars. And so on throughout the week.

That's because it progressed through the planets from the outside inward, hour by hour. Saturday started with Saturn, went through all seven three times, and then Saturn, Jupiter, and Mars; Sunday started with the Sun, and eventually went through the Sun, Venus, and Mercury; Monday started with the Moon, and so on. The planet that got in first for each day was its ruler.

[malloyd]

Originally Posted by whswhs

That's because it progressed through the planets from the outside inward, hour by hour. Saturday started with Saturn, went through all seven three times, and then Saturn, Jupiter, and Mars; Sunday started with the Sun, and eventually went through the Sun, Venus, and Mercury; Monday started with the Moon, and so on. The planet that got in first for each day was its ruler.

Which is why, as pointed out upthread, this doesn't work so great for Mars unless you do something about the number of hours or find another planet - if the number of hours (12 or 24) and the number of planets (7) aren't relatively prime, you don't get a day per planet.