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, 20 April 2027: day of Mars
- Sunrise
- 06:22
- Sunset
- 20:05
- Next sunrise
- 06:21
A day hour lasts 1h 09m; a night hour, 51 min. Local time (Europe/Rome).
Day
- 1♂︎ Mars06:22 – 07:31
- 2☉︎ Sun07:31 – 08:40
- 3♀︎ Venus08:40 – 09:48
- 4☿︎ Mercury09:48 – 10:57
- 5☽︎ Moon10:57 – 12:05
- 6♄︎ Saturn12:05 – 13:14
- 7♃︎ Jupiter13:14 – 14:22
- 8♂︎ Mars14:22 – 15:31
- 9☉︎ Sun15:31 – 16:39
- 10♀︎ Venus16:39 – 17:48
- 11☿︎ Mercury17:48 – 18:56
- 12☽︎ Moon18:56 – 20:05
Night
- 1♄︎ Saturn20:05 – 20:56
- 2♃︎ Jupiter20:56 – 21:47
- 3♂︎ Mars21:47 – 22:39
- 4☉︎ Sun22:39 – 23:30
- 5♀︎ Venus23:30 – 00:21
- 6☿︎ Mercury00:21 – 01:13
- 7☽︎ Moon01:13 – 02:04
- 8♄︎ Saturn02:04 – 02:55
- 9♃︎ Jupiter02:55 – 03:47
- 10♂︎ Mars03:47 – 04:38
- 11☉︎ Sun04:38 – 05:29
- 12♀︎ Venus05:29 – 06:21
Questions
How are the planetary hours calculated in Bologna?
On Tuesday, 20 April 2027, the Sun rises at 06:22 and sets at 20:05: the day lasts 13h 42m, that is twelve day hours of 1h 09m. The night, until the next sunrise at 06:21, lasts 10h 16m: twelve night hours of 51 min.
Which planet rules the first hour that day?
Mars, from 06:22 to 07:31: 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.