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, 19 May 2027: day of Mercury
- Sunrise
- 05:43
- Sunset
- 20:39
- Next sunrise
- 05:42
A day hour lasts 1h 15m; a night hour, 45 min. Local time (Europe/Rome).
Day
- 1☿︎ Mercury05:43 – 06:58
- 2☽︎ Moon06:58 – 08:12
- 3♄︎ Saturn08:12 – 09:27
- 4♃︎ Jupiter09:27 – 10:42
- 5♂︎ Mars10:42 – 11:56
- 6☉︎ Sun11:56 – 13:11
- 7♀︎ Venus13:11 – 14:26
- 8☿︎ Mercury14:26 – 15:40
- 9☽︎ Moon15:40 – 16:55
- 10♄︎ Saturn16:55 – 18:10
- 11♃︎ Jupiter18:10 – 19:24
- 12♂︎ Mars19:24 – 20:39
Night
- 1☉︎ Sun20:39 – 21:24
- 2♀︎ Venus21:24 – 22:09
- 3☿︎ Mercury22:09 – 22:55
- 4☽︎ Moon22:55 – 23:40
- 5♄︎ Saturn23:40 – 00:25
- 6♃︎ Jupiter00:25 – 01:10
- 7♂︎ Mars01:10 – 01:56
- 8☉︎ Sun01:56 – 02:41
- 9♀︎ Venus02:41 – 03:26
- 10☿︎ Mercury03:26 – 04:11
- 11☽︎ Moon04:11 – 04:57
- 12♄︎ Saturn04:57 – 05:42
Questions
How are the planetary hours calculated in Bologna?
On Wednesday, 19 May 2027, the Sun rises at 05:43 and sets at 20:39: the day lasts 14h 56m, that is twelve day hours of 1h 15m. The night, until the next sunrise at 05:42, lasts 9h 03m: twelve night hours of 45 min.
Which planet rules the first hour that day?
Mercury, from 05:43 to 06:58: 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.