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 Thursday, 3 December 2026: day of Jupiter
- Sunrise
- 07:32
- Sunset
- 16:35
- Next sunrise
- 07:33
A day hour lasts 45 min; a night hour, 1h 15m. Local time (Europe/Rome).
Day
- 1♃︎ Jupiter07:32 – 08:18
- 2♂︎ Mars08:18 – 09:03
- 3☉︎ Sun09:03 – 09:48
- 4♀︎ Venus09:48 – 10:33
- 5☿︎ Mercury10:33 – 11:19
- 6☽︎ Moon11:19 – 12:04
- 7♄︎ Saturn12:04 – 12:49
- 8♃︎ Jupiter12:49 – 13:34
- 9♂︎ Mars13:34 – 14:19
- 10☉︎ Sun14:19 – 15:05
- 11♀︎ Venus15:05 – 15:50
- 12☿︎ Mercury15:50 – 16:35
Night
- 1☽︎ Moon16:35 – 17:50
- 2♄︎ Saturn17:50 – 19:05
- 3♃︎ Jupiter19:05 – 20:20
- 4♂︎ Mars20:20 – 21:35
- 5☉︎ Sun21:35 – 22:49
- 6♀︎ Venus22:49 – 00:04
- 7☿︎ Mercury00:04 – 01:19
- 8☽︎ Moon01:19 – 02:34
- 9♄︎ Saturn02:34 – 03:49
- 10♃︎ Jupiter03:49 – 05:04
- 11♂︎ Mars05:04 – 06:19
- 12☉︎ Sun06:19 – 07:33
Questions
How are the planetary hours calculated in Bologna?
On Thursday, 3 December 2026, the Sun rises at 07:32 and sets at 16:35: the day lasts 9h 03m, that is twelve day hours of 45 min. The night, until the next sunrise at 07:33, lasts 14h 58m: twelve night hours of 1h 15m.
Which planet rules the first hour that day?
Jupiter, from 07:32 to 08:18: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mars, the Sun, Venus, Mercury, the Moon, Saturn, then Jupiter 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.