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 Sunday, 17 January 2027: day of the Sun
- Sunrise
- 07:46
- Sunset
- 17:02
- Next sunrise
- 07:46
A day hour lasts 46 min; a night hour, 1h 14m. Local time (Europe/Rome).
Day
- 1☉︎ Sun07:46 – 08:33
- 2♀︎ Venus08:33 – 09:19
- 3☿︎ Mercury09:19 – 10:05
- 4☽︎ Moon10:05 – 10:52
- 5♄︎ Saturn10:52 – 11:38
- 6♃︎ Jupiter11:38 – 12:24
- 7♂︎ Mars12:24 – 13:11
- 8☉︎ Sun13:11 – 13:57
- 9♀︎ Venus13:57 – 14:43
- 10☿︎ Mercury14:43 – 15:30
- 11☽︎ Moon15:30 – 16:16
- 12♄︎ Saturn16:16 – 17:02
Night
- 1♃︎ Jupiter17:02 – 18:16
- 2♂︎ Mars18:16 – 19:30
- 3☉︎ Sun19:30 – 20:43
- 4♀︎ Venus20:43 – 21:57
- 5☿︎ Mercury21:57 – 23:10
- 6☽︎ Moon23:10 – 00:24
- 7♄︎ Saturn00:24 – 01:38
- 8♃︎ Jupiter01:38 – 02:51
- 9♂︎ Mars02:51 – 04:05
- 10☉︎ Sun04:05 – 05:18
- 11♀︎ Venus05:18 – 06:32
- 12☿︎ Mercury06:32 – 07:46
Questions
How are the planetary hours calculated in Bologna?
On Sunday, 17 January 2027, the Sun rises at 07:46 and sets at 17:02: the day lasts 9h 16m, that is twelve day hours of 46 min. The night, until the next sunrise at 07:46, lasts 14h 43m: twelve night hours of 1h 14m.
Which planet rules the first hour that day?
The Sun, from 07:46 to 08:33: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Venus, Mercury, the Moon, Saturn, Jupiter, Mars, then the Sun 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.