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, 7 May 2026: day of Jupiter
- Sunrise
- 05:57
- Sunset
- 20:26
- Next sunrise
- 05:55
A day hour lasts 1h 12m; a night hour, 47 min. Local time (Europe/Rome).
Day
- 1♃︎ Jupiter05:57 – 07:09
- 2♂︎ Mars07:09 – 08:21
- 3☉︎ Sun08:21 – 09:34
- 4♀︎ Venus09:34 – 10:46
- 5☿︎ Mercury10:46 – 11:59
- 6☽︎ Moon11:59 – 13:11
- 7♄︎ Saturn13:11 – 14:24
- 8♃︎ Jupiter14:24 – 15:36
- 9♂︎ Mars15:36 – 16:48
- 10☉︎ Sun16:48 – 18:01
- 11♀︎ Venus18:01 – 19:13
- 12☿︎ Mercury19:13 – 20:26
Night
- 1☽︎ Moon20:26 – 21:13
- 2♄︎ Saturn21:13 – 22:01
- 3♃︎ Jupiter22:01 – 22:48
- 4♂︎ Mars22:48 – 23:35
- 5☉︎ Sun23:35 – 00:23
- 6♀︎ Venus00:23 – 01:10
- 7☿︎ Mercury01:10 – 01:58
- 8☽︎ Moon01:58 – 02:45
- 9♄︎ Saturn02:45 – 03:33
- 10♃︎ Jupiter03:33 – 04:20
- 11♂︎ Mars04:20 – 05:08
- 12☉︎ Sun05:08 – 05:55
Questions
How are the planetary hours calculated in Bologna?
On Thursday, 7 May 2026, the Sun rises at 05:57 and sets at 20:26: the day lasts 14h 29m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 05:55, lasts 9h 30m: twelve night hours of 47 min.
Which planet rules the first hour that day?
Jupiter, from 05:57 to 07:09: 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.