Planetary Hours

Planetary hours are the smaller timing units inside the broader system of planetary days. Traditional authors divide the daylight and nighttime spans into twelve temporal hours each, so the hours change length with the season and the latitude. In the electional material translated by Dykes, planetary hours appear as one layer of practical timing, while Agrippa preserves the same logic in Renaissance occult philosophy. The important point is that planetary hours are not separate from electional astrology. They are one of the tools used to refine it.

How the system works

The seven visible planets follow the standard Chaldean sequence: Saturn, Jupiter, Mars, Sun, Venus, Mercury, Moon. The hours move continuously through that order. Because the sequence never breaks, the planet ruling the first hour after sunrise also defines the ruler of the whole planetary day. That means planetary hours and planetary days are mathematically linked rather than being two unrelated systems.

Each day is divided into twelve hours from sunrise to sunset and twelve more from sunset to the next sunrise. These are temporal hours, not equal clock hours. In summer the daytime planetary hours are longer; in winter the nighttime ones are longer. That is why traditional hour tables depend on local sunrise and sunset rather than on fixed sixty-minute divisions.

Why planetary hours matter

Planetary hours give the practitioner a way to narrow a timing choice after the larger matter has already been judged. If the election fits the operation, the hour can strengthen the resonance between the act and its ruling planet. If the chart is poor, the right hour does not rescue it by itself. Bonatti's general rule still applies: the chart has to fit the matter, and the beginning has to be a real inception of the act. The hour is a fine-tuning layer, not a substitute for judgment. (Bonatti, On Elections, Treatise 7, chs. 3-6)

How traditional practitioners use them

In practical terms, planetary hours are usually used in one of three ways:

1. to reinforce a planet already ruling the matter
2. to choose between several otherwise acceptable windows
3. to avoid beginning an act under a clearly contrary planetary emphasis

This is why planetary hours are most useful when they agree with the purpose of the operation. A Mercury hour may suit writing, study, messages, and trade. A Venus hour may suit adornment, reconciliation, and love matters. A Mars hour may suit cutting, separation, or forceful action only if the rest of the election can carry that quality safely.

Relation to planetary days

Planetary days set the broad tone. Planetary hours narrow the focus. Working inside the right day and then choosing a sympathetic hour creates a more concentrated form of agreement. Agrippa preserves this logic as part of a larger correspondence system in which timing, materials, and intention all support one another. The strongest use of planetary hours therefore comes when the day, the hour, and the operation are all pointing in the same direction.

Best use of the page

Use this page together with Planetary Days and Electional Timing. The practical order is simple:

1. judge whether the larger election fits the matter
2. identify the planetary day
3. choose the planetary hour that best supports the act
4. begin the actual operation during that window

That sequence keeps planetary-hour work grounded in traditional practice instead of turning it into a detached symbolic checklist.