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, 12 January 2027: day of Mars
- Sunrise
- 07:49
- Sunset
- 16:56
- Next sunrise
- 07:48
A day hour lasts 46 min; a night hour, 1h 14m. Local time (Europe/Rome).
Day
- 1♂︎ Mars07:49 – 08:34
- 2☉︎ Sun08:34 – 09:20
- 3♀︎ Venus09:20 – 10:06
- 4☿︎ Mercury10:06 – 10:51
- 5☽︎ Moon10:51 – 11:37
- 6♄︎ Saturn11:37 – 12:22
- 7♃︎ Jupiter12:22 – 13:08
- 8♂︎ Mars13:08 – 13:54
- 9☉︎ Sun13:54 – 14:39
- 10♀︎ Venus14:39 – 15:25
- 11☿︎ Mercury15:25 – 16:11
- 12☽︎ Moon16:11 – 16:56
Night
- 1♄︎ Saturn16:56 – 18:11
- 2♃︎ Jupiter18:11 – 19:25
- 3♂︎ Mars19:25 – 20:39
- 4☉︎ Sun20:39 – 21:54
- 5♀︎ Venus21:54 – 23:08
- 6☿︎ Mercury23:08 – 00:22
- 7☽︎ Moon00:22 – 01:37
- 8♄︎ Saturn01:37 – 02:51
- 9♃︎ Jupiter02:51 – 04:05
- 10♂︎ Mars04:05 – 05:20
- 11☉︎ Sun05:20 – 06:34
- 12♀︎ Venus06:34 – 07:48
Questions
How are the planetary hours calculated in Bologna?
On Tuesday, 12 January 2027, the Sun rises at 07:49 and sets at 16:56: the day lasts 9h 08m, that is twelve day hours of 46 min. The night, until the next sunrise at 07:48, lasts 14h 52m: twelve night hours of 1h 14m.
Which planet rules the first hour that day?
Mars, from 07:49 to 08:34: 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.