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 Wednesday, 31 March 2027: day of Mercury
- Sunrise
- 06:58
- Sunset
- 19:40
- Next sunrise
- 06:56
A day hour lasts 1h 04m; a night hour, 56 min. Local time (Europe/Rome).
Day
- 1☿︎ Mercury06:58 – 08:01
- 2☽︎ Moon08:01 – 09:05
- 3♄︎ Saturn09:05 – 10:08
- 4♃︎ Jupiter10:08 – 11:12
- 5♂︎ Mars11:12 – 12:15
- 6☉︎ Sun12:15 – 13:19
- 7♀︎ Venus13:19 – 14:22
- 8☿︎ Mercury14:22 – 15:26
- 9☽︎ Moon15:26 – 16:29
- 10♄︎ Saturn16:29 – 17:33
- 11♃︎ Jupiter17:33 – 18:36
- 12♂︎ Mars18:36 – 19:40
Night
- 1☉︎ Sun19:40 – 20:36
- 2♀︎ Venus20:36 – 21:33
- 3☿︎ Mercury21:33 – 22:29
- 4☽︎ Moon22:29 – 23:25
- 5♄︎ Saturn23:25 – 00:22
- 6♃︎ Jupiter00:22 – 01:18
- 7♂︎ Mars01:18 – 02:14
- 8☉︎ Sun02:14 – 03:11
- 9♀︎ Venus03:11 – 04:07
- 10☿︎ Mercury04:07 – 05:03
- 11☽︎ Moon05:03 – 06:00
- 12♄︎ Saturn06:00 – 06:56
Questions
How are the planetary hours calculated in Bologna?
On Wednesday, 31 March 2027, the Sun rises at 06:58 and sets at 19:40: the day lasts 12h 42m, that is twelve day hours of 1h 04m. The night, until the next sunrise at 06:56, lasts 11h 16m: twelve night hours of 56 min.
Which planet rules the first hour that day?
Mercury, from 06:58 to 08:01: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Moon, Saturn, Jupiter, Mars, the Sun, Venus, then Mercury 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.