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 Saturday, 17 July 2027: day of Saturn
- Sunrise
- 05:45
- Sunset
- 20:55
- Next sunrise
- 05:46
A day hour lasts 1h 16m; a night hour, 44 min. Local time (Europe/Rome).
Day
- 1♄︎ Saturn05:45 – 07:01
- 2♃︎ Jupiter07:01 – 08:17
- 3♂︎ Mars08:17 – 09:33
- 4☉︎ Sun09:33 – 10:48
- 5♀︎ Venus10:48 – 12:04
- 6☿︎ Mercury12:04 – 13:20
- 7☽︎ Moon13:20 – 14:36
- 8♄︎ Saturn14:36 – 15:52
- 9♃︎ Jupiter15:52 – 17:08
- 10♂︎ Mars17:08 – 18:23
- 11☉︎ Sun18:23 – 19:39
- 12♀︎ Venus19:39 – 20:55
Night
- 1☿︎ Mercury20:55 – 21:39
- 2☽︎ Moon21:39 – 22:24
- 3♄︎ Saturn22:24 – 23:08
- 4♃︎ Jupiter23:08 – 23:52
- 5♂︎ Mars23:52 – 00:36
- 6☉︎ Sun00:36 – 01:21
- 7♀︎ Venus01:21 – 02:05
- 8☿︎ Mercury02:05 – 02:49
- 9☽︎ Moon02:49 – 03:33
- 10♄︎ Saturn03:33 – 04:18
- 11♃︎ Jupiter04:18 – 05:02
- 12♂︎ Mars05:02 – 05:46
Questions
How are the planetary hours calculated in Bologna?
On Saturday, 17 July 2027, the Sun rises at 05:45 and sets at 20:55: the day lasts 15h 10m, that is twelve day hours of 1h 16m. The night, until the next sunrise at 05:46, lasts 8h 51m: twelve night hours of 44 min.
Which planet rules the first hour that day?
Saturn, from 05:45 to 07:01: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn 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.