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 Tuesday, 1 December 2026: day of Mars
- Sunrise
- 07:30
- Sunset
- 16:36
- Next sunrise
- 07:31
A day hour lasts 45 min; a night hour, 1h 15m. Local time (Europe/Rome).
Day
- 1♂︎ Mars07:30 – 08:16
- 2☉︎ Sun08:16 – 09:01
- 3♀︎ Venus09:01 – 09:47
- 4☿︎ Mercury09:47 – 10:32
- 5☽︎ Moon10:32 – 11:18
- 6♄︎ Saturn11:18 – 12:03
- 7♃︎ Jupiter12:03 – 12:48
- 8♂︎ Mars12:48 – 13:34
- 9☉︎ Sun13:34 – 14:19
- 10♀︎ Venus14:19 – 15:05
- 11☿︎ Mercury15:05 – 15:50
- 12☽︎ Moon15:50 – 16:36
Night
- 1♄︎ Saturn16:36 – 17:50
- 2♃︎ Jupiter17:50 – 19:05
- 3♂︎ Mars19:05 – 20:20
- 4☉︎ Sun20:20 – 21:34
- 5♀︎ Venus21:34 – 22:49
- 6☿︎ Mercury22:49 – 00:04
- 7☽︎ Moon00:04 – 01:18
- 8♄︎ Saturn01:18 – 02:33
- 9♃︎ Jupiter02:33 – 03:47
- 10♂︎ Mars03:47 – 05:02
- 11☉︎ Sun05:02 – 06:17
- 12♀︎ Venus06:17 – 07:31
Questions
How are the planetary hours calculated in Bologna?
On Tuesday, 1 December 2026, the Sun rises at 07:30 and sets at 16:36: the day lasts 9h 06m, that is twelve day hours of 45 min. The night, until the next sunrise at 07:31, lasts 14h 56m: twelve night hours of 1h 15m.
Which planet rules the first hour that day?
Mars, from 07:30 to 08:16: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars 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.