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, 22 December 2026: day of Mars
- Sunrise
- 07:48
- Sunset
- 16:38
- Next sunrise
- 07:48
A day hour lasts 44 min; a night hour, 1h 16m. Local time (Europe/Rome).
Day
- 1♂︎ Mars07:48 – 08:32
- 2☉︎ Sun08:32 – 09:16
- 3♀︎ Venus09:16 – 10:00
- 4☿︎ Mercury10:00 – 10:44
- 5☽︎ Moon10:44 – 11:29
- 6♄︎ Saturn11:29 – 12:13
- 7♃︎ Jupiter12:13 – 12:57
- 8♂︎ Mars12:57 – 13:41
- 9☉︎ Sun13:41 – 14:25
- 10♀︎ Venus14:25 – 15:09
- 11☿︎ Mercury15:09 – 15:53
- 12☽︎ Moon15:53 – 16:38
Night
- 1♄︎ Saturn16:38 – 17:53
- 2♃︎ Jupiter17:53 – 19:09
- 3♂︎ Mars19:09 – 20:25
- 4☉︎ Sun20:25 – 21:41
- 5♀︎ Venus21:41 – 22:57
- 6☿︎ Mercury22:57 – 00:13
- 7☽︎ Moon00:13 – 01:29
- 8♄︎ Saturn01:29 – 02:45
- 9♃︎ Jupiter02:45 – 04:01
- 10♂︎ Mars04:01 – 05:16
- 11☉︎ Sun05:16 – 06:32
- 12♀︎ Venus06:32 – 07:48
Questions
How are the planetary hours calculated in Bologna?
On Tuesday, 22 December 2026, the Sun rises at 07:48 and sets at 16:38: the day lasts 8h 50m, that is twelve day hours of 44 min. The night, until the next sunrise at 07:48, lasts 15h 11m: twelve night hours of 1h 16m.
Which planet rules the first hour that day?
Mars, from 07:48 to 08:32: 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.