Planetary hours
in Brussels.
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 Thursday, 17 December 2026: day of Jupiter
- Sunrise
- 08:39
- Sunset
- 16:37
- Next sunrise
- 08:40
A day hour lasts 40 min; a night hour, 1h 20m. Local time (Europe/Brussels).
Day
- 1♃︎ Jupiter08:39 – 09:19
- 2♂︎ Mars09:19 – 09:59
- 3☉︎ Sun09:59 – 10:39
- 4♀︎ Venus10:39 – 11:19
- 5☿︎ Mercury11:19 – 11:58
- 6☽︎ Moon11:58 – 12:38
- 7♄︎ Saturn12:38 – 13:18
- 8♃︎ Jupiter13:18 – 13:58
- 9♂︎ Mars13:58 – 14:37
- 10☉︎ Sun14:37 – 15:17
- 11♀︎ Venus15:17 – 15:57
- 12☿︎ Mercury15:57 – 16:37
Night
- 1☽︎ Moon16:37 – 17:57
- 2♄︎ Saturn17:57 – 19:17
- 3♃︎ Jupiter19:17 – 20:38
- 4♂︎ Mars20:38 – 21:58
- 5☉︎ Sun21:58 – 23:18
- 6♀︎ Venus23:18 – 00:38
- 7☿︎ Mercury00:38 – 01:59
- 8☽︎ Moon01:59 – 03:19
- 9♄︎ Saturn03:19 – 04:39
- 10♃︎ Jupiter04:39 – 06:00
- 11♂︎ Mars06:00 – 07:20
- 12☉︎ Sun07:20 – 08:40
Other cities · Belgium
Questions
How are the planetary hours calculated in Brussels?
On Thursday, 17 December 2026, the Sun rises at 08:39 and sets at 16:37: the day lasts 7h 57m, that is twelve day hours of 40 min. The night, until the next sunrise at 08:40, lasts 16h 03m: twelve night hours of 1h 20m.
Which planet rules the first hour that day?
Jupiter, from 08:39 to 09:19: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mars, the Sun, Venus, Mercury, the Moon, Saturn, then Jupiter 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.