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 Sunday, 30 August 2026: day of the Sun
- Sunrise
- 06:34
- Sunset
- 19:54
- Next sunrise
- 06:35
A day hour lasts 1h 07m; a night hour, 53 min. Local time (Europe/Rome).
Day
- 1☉︎ Sun06:34 – 07:41
- 2♀︎ Venus07:41 – 08:48
- 3☿︎ Mercury08:48 – 09:54
- 4☽︎ Moon09:54 – 11:01
- 5♄︎ Saturn11:01 – 12:08
- 6♃︎ Jupiter12:08 – 13:14
- 7♂︎ Mars13:14 – 14:21
- 8☉︎ Sun14:21 – 15:28
- 9♀︎ Venus15:28 – 16:34
- 10☿︎ Mercury16:34 – 17:41
- 11☽︎ Moon17:41 – 18:48
- 12♄︎ Saturn18:48 – 19:54
Night
- 1♃︎ Jupiter19:54 – 20:48
- 2♂︎ Mars20:48 – 21:41
- 3☉︎ Sun21:41 – 22:35
- 4♀︎ Venus22:35 – 23:28
- 5☿︎ Mercury23:28 – 00:22
- 6☽︎ Moon00:22 – 01:15
- 7♄︎ Saturn01:15 – 02:08
- 8♃︎ Jupiter02:08 – 03:02
- 9♂︎ Mars03:02 – 03:55
- 10☉︎ Sun03:55 – 04:49
- 11♀︎ Venus04:49 – 05:42
- 12☿︎ Mercury05:42 – 06:35
Questions
How are the planetary hours calculated in Bologna?
On Sunday, 30 August 2026, the Sun rises at 06:34 and sets at 19:54: the day lasts 13h 20m, that is twelve day hours of 1h 07m. The night, until the next sunrise at 06:35, lasts 10h 41m: twelve night hours of 53 min.
Which planet rules the first hour that day?
The Sun, from 06:34 to 07:41: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Venus, Mercury, the Moon, Saturn, Jupiter, Mars, then the Sun 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.