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, 8 January 2027: day of Venus
- Sunrise
- 07:50
- Sunset
- 16:52
- Next sunrise
- 07:50
A day hour lasts 45 min; a night hour, 1h 15m. Local time (Europe/Rome).
Day
- 1♀︎ Venus07:50 – 08:35
- 2☿︎ Mercury08:35 – 09:20
- 3☽︎ Moon09:20 – 10:05
- 4♄︎ Saturn10:05 – 10:51
- 5♃︎ Jupiter10:51 – 11:36
- 6♂︎ Mars11:36 – 12:21
- 7☉︎ Sun12:21 – 13:06
- 8♀︎ Venus13:06 – 13:51
- 9☿︎ Mercury13:51 – 14:36
- 10☽︎ Moon14:36 – 15:21
- 11♄︎ Saturn15:21 – 16:07
- 12♃︎ Jupiter16:07 – 16:52
Night
- 1♂︎ Mars16:52 – 18:07
- 2☉︎ Sun18:07 – 19:21
- 3♀︎ Venus19:21 – 20:36
- 4☿︎ Mercury20:36 – 21:51
- 5☽︎ Moon21:51 – 23:06
- 6♄︎ Saturn23:06 – 00:21
- 7♃︎ Jupiter00:21 – 01:36
- 8♂︎ Mars01:36 – 02:50
- 9☉︎ Sun02:50 – 04:05
- 10♀︎ Venus04:05 – 05:20
- 11☿︎ Mercury05:20 – 06:35
- 12☽︎ Moon06:35 – 07:50
Questions
How are the planetary hours calculated in Bologna?
On Friday, 8 January 2027, the Sun rises at 07:50 and sets at 16:52: the day lasts 9h 02m, that is twelve day hours of 45 min. The night, until the next sunrise at 07:50, lasts 14h 58m: twelve night hours of 1h 15m.
Which planet rules the first hour that day?
Venus, from 07:50 to 08:35: 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.