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, 27 December 2026: day of the Sun
- Sunrise
- 07:50
- Sunset
- 16:41
- Next sunrise
- 07:50
A day hour lasts 44 min; a night hour, 1h 16m. Local time (Europe/Rome).
Day
- 1☉︎ Sun07:50 – 08:34
- 2♀︎ Venus08:34 – 09:18
- 3☿︎ Mercury09:18 – 10:02
- 4☽︎ Moon10:02 – 10:47
- 5♄︎ Saturn10:47 – 11:31
- 6♃︎ Jupiter11:31 – 12:15
- 7♂︎ Mars12:15 – 12:59
- 8☉︎ Sun12:59 – 13:44
- 9♀︎ Venus13:44 – 14:28
- 10☿︎ Mercury14:28 – 15:12
- 11☽︎ Moon15:12 – 15:56
- 12♄︎ Saturn15:56 – 16:41
Night
- 1♃︎ Jupiter16:41 – 17:56
- 2♂︎ Mars17:56 – 19:12
- 3☉︎ Sun19:12 – 20:28
- 4♀︎ Venus20:28 – 21:44
- 5☿︎ Mercury21:44 – 23:00
- 6☽︎ Moon23:00 – 00:15
- 7♄︎ Saturn00:15 – 01:31
- 8♃︎ Jupiter01:31 – 02:47
- 9♂︎ Mars02:47 – 04:03
- 10☉︎ Sun04:03 – 05:18
- 11♀︎ Venus05:18 – 06:34
- 12☿︎ Mercury06:34 – 07:50
Questions
How are the planetary hours calculated in Bologna?
On Sunday, 27 December 2026, the Sun rises at 07:50 and sets at 16:41: the day lasts 8h 51m, that is twelve day hours of 44 min. The night, until the next sunrise at 07:50, lasts 15h 09m: twelve night hours of 1h 16m.
Which planet rules the first hour that day?
The Sun, from 07:50 to 08:34: 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.