Planetary hours
in Dortmund.
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 Tuesday, 9 December 2025: day of Mars
- Sunrise
- 08:23
- Sunset
- 16:21
- Next sunrise
- 08:24
A day hour lasts 40 min; a night hour, 1h 20m. Local time (Europe/Berlin).
Day
- 1♂︎ Mars08:23 – 09:03
- 2☉︎ Sun09:03 – 09:43
- 3♀︎ Venus09:43 – 10:23
- 4☿︎ Mercury10:23 – 11:02
- 5☽︎ Moon11:02 – 11:42
- 6♄︎ Saturn11:42 – 12:22
- 7♃︎ Jupiter12:22 – 13:02
- 8♂︎ Mars13:02 – 13:42
- 9☉︎ Sun13:42 – 14:21
- 10♀︎ Venus14:21 – 15:01
- 11☿︎ Mercury15:01 – 15:41
- 12☽︎ Moon15:41 – 16:21
Night
- 1♄︎ Saturn16:21 – 17:41
- 2♃︎ Jupiter17:41 – 19:01
- 3♂︎ Mars19:01 – 20:22
- 4☉︎ Sun20:22 – 21:42
- 5♀︎ Venus21:42 – 23:02
- 6☿︎ Mercury23:02 – 00:22
- 7☽︎ Moon00:22 – 01:43
- 8♄︎ Saturn01:43 – 03:03
- 9♃︎ Jupiter03:03 – 04:23
- 10♂︎ Mars04:23 – 05:44
- 11☉︎ Sun05:44 – 07:04
- 12♀︎ Venus07:04 – 08:24
Other cities · Germany
Questions
How are the planetary hours calculated in Dortmund?
On Tuesday, 9 December 2025, the Sun rises at 08:23 and sets at 16:21: the day lasts 7h 58m, that is twelve day hours of 40 min. The night, until the next sunrise at 08:24, lasts 16h 03m: twelve night hours of 1h 20m.
Which planet rules the first hour that day?
Mars, from 08:23 to 09:03: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars 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.