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, 23 December 2025: day of Mars
- Sunrise
- 08:34
- Sunset
- 16:24
- Next sunrise
- 08:34
A day hour lasts 39 min; a night hour, 1h 21m. Local time (Europe/Berlin).
Day
- 1♂︎ Mars08:34 – 09:13
- 2☉︎ Sun09:13 – 09:52
- 3♀︎ Venus09:52 – 10:31
- 4☿︎ Mercury10:31 – 11:10
- 5☽︎ Moon11:10 – 11:50
- 6♄︎ Saturn11:50 – 12:29
- 7♃︎ Jupiter12:29 – 13:08
- 8♂︎ Mars13:08 – 13:47
- 9☉︎ Sun13:47 – 14:26
- 10♀︎ Venus14:26 – 15:05
- 11☿︎ Mercury15:05 – 15:45
- 12☽︎ Moon15:45 – 16:24
Night
- 1♄︎ Saturn16:24 – 17:45
- 2♃︎ Jupiter17:45 – 19:05
- 3♂︎ Mars19:05 – 20:26
- 4☉︎ Sun20:26 – 21:47
- 5♀︎ Venus21:47 – 23:08
- 6☿︎ Mercury23:08 – 00:29
- 7☽︎ Moon00:29 – 01:50
- 8♄︎ Saturn01:50 – 03:11
- 9♃︎ Jupiter03:11 – 04:32
- 10♂︎ Mars04:32 – 05:52
- 11☉︎ Sun05:52 – 07:13
- 12♀︎ Venus07:13 – 08:34
Other cities · Germany
Questions
How are the planetary hours calculated in Dortmund?
On Tuesday, 23 December 2025, the Sun rises at 08:34 and sets at 16:24: the day lasts 7h 50m, that is twelve day hours of 39 min. The night, until the next sunrise at 08:34, lasts 16h 11m: twelve night hours of 1h 21m.
Which planet rules the first hour that day?
Mars, from 08:34 to 09:13: 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.