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, 6 August 2026: day of Jupiter
- Sunrise
- 06:06
- Sunset
- 20:33
- Next sunrise
- 06:08
A day hour lasts 1h 12m; a night hour, 48 min. Local time (Europe/Rome).
Day
- 1♃︎ Jupiter06:06 – 07:19
- 2♂︎ Mars07:19 – 08:31
- 3☉︎ Sun08:31 – 09:43
- 4♀︎ Venus09:43 – 10:55
- 5☿︎ Mercury10:55 – 12:07
- 6☽︎ Moon12:07 – 13:20
- 7♄︎ Saturn13:20 – 14:32
- 8♃︎ Jupiter14:32 – 15:44
- 9♂︎ Mars15:44 – 16:56
- 10☉︎ Sun16:56 – 18:09
- 11♀︎ Venus18:09 – 19:21
- 12☿︎ Mercury19:21 – 20:33
Night
- 1☽︎ Moon20:33 – 21:21
- 2♄︎ Saturn21:21 – 22:09
- 3♃︎ Jupiter22:09 – 22:57
- 4♂︎ Mars22:57 – 23:44
- 5☉︎ Sun23:44 – 00:32
- 6♀︎ Venus00:32 – 01:20
- 7☿︎ Mercury01:20 – 02:08
- 8☽︎ Moon02:08 – 02:56
- 9♄︎ Saturn02:56 – 03:44
- 10♃︎ Jupiter03:44 – 04:32
- 11♂︎ Mars04:32 – 05:20
- 12☉︎ Sun05:20 – 06:08
Questions
How are the planetary hours calculated in Bologna?
On Thursday, 6 August 2026, the Sun rises at 06:06 and sets at 20:33: the day lasts 14h 27m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 06:08, lasts 9h 35m: twelve night hours of 48 min.
Which planet rules the first hour that day?
Jupiter, from 06:06 to 07:19: 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.