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, 19 January 2027: day of Mars
- Sunrise
- 07:45
- Sunset
- 17:05
- Next sunrise
- 07:44
A day hour lasts 47 min; a night hour, 1h 13m. Local time (Europe/Rome).
Day
- 1♂︎ Mars07:45 – 08:32
- 2☉︎ Sun08:32 – 09:18
- 3♀︎ Venus09:18 – 10:05
- 4☿︎ Mercury10:05 – 10:52
- 5☽︎ Moon10:52 – 11:38
- 6♄︎ Saturn11:38 – 12:25
- 7♃︎ Jupiter12:25 – 13:12
- 8♂︎ Mars13:12 – 13:58
- 9☉︎ Sun13:58 – 14:45
- 10♀︎ Venus14:45 – 15:32
- 11☿︎ Mercury15:32 – 16:18
- 12☽︎ Moon16:18 – 17:05
Night
- 1♄︎ Saturn17:05 – 18:18
- 2♃︎ Jupiter18:18 – 19:32
- 3♂︎ Mars19:32 – 20:45
- 4☉︎ Sun20:45 – 21:58
- 5♀︎ Venus21:58 – 23:11
- 6☿︎ Mercury23:11 – 00:25
- 7☽︎ Moon00:25 – 01:38
- 8♄︎ Saturn01:38 – 02:51
- 9♃︎ Jupiter02:51 – 04:04
- 10♂︎ Mars04:04 – 05:18
- 11☉︎ Sun05:18 – 06:31
- 12♀︎ Venus06:31 – 07:44
Questions
How are the planetary hours calculated in Bologna?
On Tuesday, 19 January 2027, the Sun rises at 07:45 and sets at 17:05: the day lasts 9h 20m, that is twelve day hours of 47 min. The night, until the next sunrise at 07:44, lasts 14h 39m: twelve night hours of 1h 13m.
Which planet rules the first hour that day?
Mars, from 07:45 to 08:32: 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.