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 September 2026: day of Saturn
- Sunrise
- 06:58
- Sunset
- 19:18
- Next sunrise
- 06:59
A day hour lasts 1h 02m; a night hour, 58 min. Local time (Europe/Rome).
Day
- 1♄︎ Saturn06:58 – 07:59
- 2♃︎ Jupiter07:59 – 09:01
- 3♂︎ Mars09:01 – 10:03
- 4☉︎ Sun10:03 – 11:04
- 5♀︎ Venus11:04 – 12:06
- 6☿︎ Mercury12:06 – 13:08
- 7☽︎ Moon13:08 – 14:09
- 8♄︎ Saturn14:09 – 15:11
- 9♃︎ Jupiter15:11 – 16:13
- 10♂︎ Mars16:13 – 17:14
- 11☉︎ Sun17:14 – 18:16
- 12♀︎ Venus18:16 – 19:18
Night
- 1☿︎ Mercury19:18 – 20:16
- 2☽︎ Moon20:16 – 21:14
- 3♄︎ Saturn21:14 – 22:13
- 4♃︎ Jupiter22:13 – 23:11
- 5♂︎ Mars23:11 – 00:10
- 6☉︎ Sun00:10 – 01:08
- 7♀︎ Venus01:08 – 02:07
- 8☿︎ Mercury02:07 – 03:05
- 9☽︎ Moon03:05 – 04:03
- 10♄︎ Saturn04:03 – 05:02
- 11♃︎ Jupiter05:02 – 06:00
- 12♂︎ Mars06:00 – 06:59
Questions
How are the planetary hours calculated in Bologna?
On Saturday, 19 September 2026, the Sun rises at 06:58 and sets at 19:18: the day lasts 12h 20m, that is twelve day hours of 1h 02m. The night, until the next sunrise at 06:59, lasts 11h 41m: twelve night hours of 58 min.
Which planet rules the first hour that day?
Saturn, from 06:58 to 07:59: 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.