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 Tuesday, 7 December 2027: day of Mars
- Sunrise
- 07:36
- Sunset
- 16:34
- Next sunrise
- 07:37
A day hour lasts 45 min; a night hour, 1h 15m. Local time (Europe/Rome).
Day
- 1♂︎ Mars07:36 – 08:21
- 2☉︎ Sun08:21 – 09:06
- 3♀︎ Venus09:06 – 09:51
- 4☿︎ Mercury09:51 – 10:36
- 5☽︎ Moon10:36 – 11:21
- 6♄︎ Saturn11:21 – 12:05
- 7♃︎ Jupiter12:05 – 12:50
- 8♂︎ Mars12:50 – 13:35
- 9☉︎ Sun13:35 – 14:20
- 10♀︎ Venus14:20 – 15:05
- 11☿︎ Mercury15:05 – 15:50
- 12☽︎ Moon15:50 – 16:34
Night
- 1♄︎ Saturn16:34 – 17:50
- 2♃︎ Jupiter17:50 – 19:05
- 3♂︎ Mars19:05 – 20:20
- 4☉︎ Sun20:20 – 21:35
- 5♀︎ Venus21:35 – 22:51
- 6☿︎ Mercury22:51 – 00:06
- 7☽︎ Moon00:06 – 01:21
- 8♄︎ Saturn01:21 – 02:36
- 9♃︎ Jupiter02:36 – 03:52
- 10♂︎ Mars03:52 – 05:07
- 11☉︎ Sun05:07 – 06:22
- 12♀︎ Venus06:22 – 07:37
Questions
How are the planetary hours calculated in Bologna?
On Tuesday, 7 December 2027, the Sun rises at 07:36 and sets at 16:34: the day lasts 8h 58m, that is twelve day hours of 45 min. The night, until the next sunrise at 07:37, lasts 15h 03m: twelve night hours of 1h 15m.
Which planet rules the first hour that day?
Mars, from 07:36 to 08:21: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars 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.