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, 27 August 2026: day of Jupiter
- Sunrise
- 06:31
- Sunset
- 20:00
- Next sunrise
- 06:32
A day hour lasts 1h 07m; a night hour, 53 min. Local time (Europe/Rome).
Day
- 1♃︎ Jupiter06:31 – 07:38
- 2♂︎ Mars07:38 – 08:46
- 3☉︎ Sun08:46 – 09:53
- 4♀︎ Venus09:53 – 11:00
- 5☿︎ Mercury11:00 – 12:08
- 6☽︎ Moon12:08 – 13:15
- 7♄︎ Saturn13:15 – 14:23
- 8♃︎ Jupiter14:23 – 15:30
- 9♂︎ Mars15:30 – 16:38
- 10☉︎ Sun16:38 – 17:45
- 11♀︎ Venus17:45 – 18:52
- 12☿︎ Mercury18:52 – 20:00
Night
- 1☽︎ Moon20:00 – 20:52
- 2♄︎ Saturn20:52 – 21:45
- 3♃︎ Jupiter21:45 – 22:38
- 4♂︎ Mars22:38 – 23:30
- 5☉︎ Sun23:30 – 00:23
- 6♀︎ Venus00:23 – 01:16
- 7☿︎ Mercury01:16 – 02:09
- 8☽︎ Moon02:09 – 03:01
- 9♄︎ Saturn03:01 – 03:54
- 10♃︎ Jupiter03:54 – 04:47
- 11♂︎ Mars04:47 – 05:39
- 12☉︎ Sun05:39 – 06:32
Questions
How are the planetary hours calculated in Bologna?
On Thursday, 27 August 2026, the Sun rises at 06:31 and sets at 20:00: the day lasts 13h 29m, that is twelve day hours of 1h 07m. The night, until the next sunrise at 06:32, lasts 10h 32m: twelve night hours of 53 min.
Which planet rules the first hour that day?
Jupiter, from 06:31 to 07:38: 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.