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 Friday, 22 January 2027: day of Venus
- Sunrise
- 07:43
- Sunset
- 17:09
- Next sunrise
- 07:42
A day hour lasts 47 min; a night hour, 1h 13m. Local time (Europe/Rome).
Day
- 1♀︎ Venus07:43 – 08:30
- 2☿︎ Mercury08:30 – 09:17
- 3☽︎ Moon09:17 – 10:04
- 4♄︎ Saturn10:04 – 10:51
- 5♃︎ Jupiter10:51 – 11:39
- 6♂︎ Mars11:39 – 12:26
- 7☉︎ Sun12:26 – 13:13
- 8♀︎ Venus13:13 – 14:00
- 9☿︎ Mercury14:00 – 14:47
- 10☽︎ Moon14:47 – 15:35
- 11♄︎ Saturn15:35 – 16:22
- 12♃︎ Jupiter16:22 – 17:09
Night
- 1♂︎ Mars17:09 – 18:22
- 2☉︎ Sun18:22 – 19:34
- 3♀︎ Venus19:34 – 20:47
- 4☿︎ Mercury20:47 – 22:00
- 5☽︎ Moon22:00 – 23:13
- 6♄︎ Saturn23:13 – 00:25
- 7♃︎ Jupiter00:25 – 01:38
- 8♂︎ Mars01:38 – 02:51
- 9☉︎ Sun02:51 – 04:04
- 10♀︎ Venus04:04 – 05:16
- 11☿︎ Mercury05:16 – 06:29
- 12☽︎ Moon06:29 – 07:42
Questions
How are the planetary hours calculated in Bologna?
On Friday, 22 January 2027, the Sun rises at 07:43 and sets at 17:09: the day lasts 9h 26m, that is twelve day hours of 47 min. The night, until the next sunrise at 07:42, lasts 14h 33m: twelve night hours of 1h 13m.
Which planet rules the first hour that day?
Venus, from 07:43 to 08:30: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mercury, the Moon, Saturn, Jupiter, Mars, the Sun, then Venus 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.