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, 19 December 2026: day of Saturn
- Sunrise
- 07:46
- Sunset
- 16:36
- Next sunrise
- 07:47
A day hour lasts 44 min; a night hour, 1h 16m. Local time (Europe/Rome).
Day
- 1♄︎ Saturn07:46 – 08:30
- 2♃︎ Jupiter08:30 – 09:15
- 3♂︎ Mars09:15 – 09:59
- 4☉︎ Sun09:59 – 10:43
- 5♀︎ Venus10:43 – 11:27
- 6☿︎ Mercury11:27 – 12:11
- 7☽︎ Moon12:11 – 12:55
- 8♄︎ Saturn12:55 – 13:40
- 9♃︎ Jupiter13:40 – 14:24
- 10♂︎ Mars14:24 – 15:08
- 11☉︎ Sun15:08 – 15:52
- 12♀︎ Venus15:52 – 16:36
Night
- 1☿︎ Mercury16:36 – 17:52
- 2☽︎ Moon17:52 – 19:08
- 3♄︎ Saturn19:08 – 20:24
- 4♃︎ Jupiter20:24 – 21:40
- 5♂︎ Mars21:40 – 22:56
- 6☉︎ Sun22:56 – 00:11
- 7♀︎ Venus00:11 – 01:27
- 8☿︎ Mercury01:27 – 02:43
- 9☽︎ Moon02:43 – 03:59
- 10♄︎ Saturn03:59 – 05:15
- 11♃︎ Jupiter05:15 – 06:31
- 12♂︎ Mars06:31 – 07:47
Questions
How are the planetary hours calculated in Bologna?
On Saturday, 19 December 2026, the Sun rises at 07:46 and sets at 16:36: the day lasts 8h 50m, that is twelve day hours of 44 min. The night, until the next sunrise at 07:47, lasts 15h 11m: twelve night hours of 1h 16m.
Which planet rules the first hour that day?
Saturn, from 07:46 to 08:30: 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.