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 Saturday, 10 October 2026: day of Saturn
- Sunrise
- 07:23
- Sunset
- 18:39
- Next sunrise
- 07:24
A day hour lasts 56 min; a night hour, 1h 04m. Local time (Europe/Rome).
Day
- 1♄︎ Saturn07:23 – 08:19
- 2♃︎ Jupiter08:19 – 09:15
- 3♂︎ Mars09:15 – 10:12
- 4☉︎ Sun10:12 – 11:08
- 5♀︎ Venus11:08 – 12:04
- 6☿︎ Mercury12:04 – 13:01
- 7☽︎ Moon13:01 – 13:57
- 8♄︎ Saturn13:57 – 14:53
- 9♃︎ Jupiter14:53 – 15:50
- 10♂︎ Mars15:50 – 16:46
- 11☉︎ Sun16:46 – 17:42
- 12♀︎ Venus17:42 – 18:39
Night
- 1☿︎ Mercury18:39 – 19:43
- 2☽︎ Moon19:43 – 20:46
- 3♄︎ Saturn20:46 – 21:50
- 4♃︎ Jupiter21:50 – 22:54
- 5♂︎ Mars22:54 – 23:58
- 6☉︎ Sun23:58 – 01:01
- 7♀︎ Venus01:01 – 02:05
- 8☿︎ Mercury02:05 – 03:09
- 9☽︎ Moon03:09 – 04:13
- 10♄︎ Saturn04:13 – 05:16
- 11♃︎ Jupiter05:16 – 06:20
- 12♂︎ Mars06:20 – 07:24
Questions
How are the planetary hours calculated in Bologna?
On Saturday, 10 October 2026, the Sun rises at 07:23 and sets at 18:39: the day lasts 11h 16m, that is twelve day hours of 56 min. The night, until the next sunrise at 07:24, lasts 12h 45m: twelve night hours of 1h 04m.
Which planet rules the first hour that day?
Saturn, from 07:23 to 08:19: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn 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.