Planetary hours
in Bologna.
The day, from sunrise to sunset, is cut into twelve equal hours; so is the night, from sunset to the next sunrise. Each hour carries a planet, in the Chaldean order. A planetary hour therefore lasts 60 minutes only at the equinoxes: it all depends on the date and the city. Here are the exact hours for your city; what you do with them is up to you.
Planetary day of Wednesday, 12 November 2025: day of Mercury
- Sunrise
- 07:07
- Sunset
- 16:50
- Next sunrise
- 07:08
A day hour lasts 49 min; a night hour, 1h 12m. Local time (Europe/Rome).
Day
- 1☿︎ Mercury07:07 – 07:55
- 2☽︎ Moon07:55 – 08:44
- 3♄︎ Saturn08:44 – 09:32
- 4♃︎ Jupiter09:32 – 10:21
- 5♂︎ Mars10:21 – 11:09
- 6☉︎ Sun11:09 – 11:58
- 7♀︎ Venus11:58 – 12:47
- 8☿︎ Mercury12:47 – 13:35
- 9☽︎ Moon13:35 – 14:24
- 10♄︎ Saturn14:24 – 15:12
- 11♃︎ Jupiter15:12 – 16:01
- 12♂︎ Mars16:01 – 16:50
Night
- 1☉︎ Sun16:50 – 18:01
- 2♀︎ Venus18:01 – 19:13
- 3☿︎ Mercury19:13 – 20:24
- 4☽︎ Moon20:24 – 21:36
- 5♄︎ Saturn21:36 – 22:47
- 6♃︎ Jupiter22:47 – 23:59
- 7♂︎ Mars23:59 – 01:10
- 8☉︎ Sun01:10 – 02:22
- 9♀︎ Venus02:22 – 03:33
- 10☿︎ Mercury03:33 – 04:45
- 11☽︎ Moon04:45 – 05:56
- 12♄︎ Saturn05:56 – 07:08
Questions
How are the planetary hours calculated in Bologna?
On Wednesday, 12 November 2025, the Sun rises at 07:07 and sets at 16:50: the day lasts 9h 43m, that is twelve day hours of 49 min. The night, until the next sunrise at 07:08, lasts 14h 18m: twelve night hours of 1h 12m.
Which planet rules the first hour that day?
Mercury, from 07:07 to 07:55: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Moon, Saturn, Jupiter, Mars, the Sun, Venus, then Mercury again.
Today’s sky, on YOUR chart
Planetary hours are the same for everyone in a city. Your chart is yours alone: every morning AstroXP crosses the real sky with your birth, to the minute, and tells you what time it plays out for you.
On a computer? Scan this code with your phone.
Calendars
Sunrise and sunset calculated for the city (the Sun’s centre 0°50′ below the horizon: refraction and semi-diameter), local time of the city’s time zone. Checked against astronomy-engine, the app’s engine.