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, 8 October 2026: day of Jupiter
- Sunrise
- 07:20
- Sunset
- 18:42
- Next sunrise
- 07:22
A day hour lasts 57 min; a night hour, 1h 03m. Local time (Europe/Rome).
Day
- 1♃︎ Jupiter07:20 – 08:17
- 2♂︎ Mars08:17 – 09:14
- 3☉︎ Sun09:14 – 10:11
- 4♀︎ Venus10:11 – 11:08
- 5☿︎ Mercury11:08 – 12:04
- 6☽︎ Moon12:04 – 13:01
- 7♄︎ Saturn13:01 – 13:58
- 8♃︎ Jupiter13:58 – 14:55
- 9♂︎ Mars14:55 – 15:52
- 10☉︎ Sun15:52 – 16:49
- 11♀︎ Venus16:49 – 17:46
- 12☿︎ Mercury17:46 – 18:42
Night
- 1☽︎ Moon18:42 – 19:46
- 2♄︎ Saturn19:46 – 20:49
- 3♃︎ Jupiter20:49 – 21:52
- 4♂︎ Mars21:52 – 22:55
- 5☉︎ Sun22:55 – 23:59
- 6♀︎ Venus23:59 – 01:02
- 7☿︎ Mercury01:02 – 02:05
- 8☽︎ Moon02:05 – 03:08
- 9♄︎ Saturn03:08 – 04:12
- 10♃︎ Jupiter04:12 – 05:15
- 11♂︎ Mars05:15 – 06:18
- 12☉︎ Sun06:18 – 07:22
Questions
How are the planetary hours calculated in Bologna?
On Thursday, 8 October 2026, the Sun rises at 07:20 and sets at 18:42: the day lasts 11h 22m, that is twelve day hours of 57 min. The night, until the next sunrise at 07:22, lasts 12h 39m: twelve night hours of 1h 03m.
Which planet rules the first hour that day?
Jupiter, from 07:20 to 08:17: 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.