Planetary hours
in Nagoya.
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 Wednesday, 30 April 2025: day of Mercury
- Sunrise
- 05:02
- Sunset
- 18:37
- Next sunrise
- 05:01
A day hour lasts 1h 08m; a night hour, 52 min. Local time (Asia/Tokyo).
Day
- 1☿︎ Mercury05:02 – 06:10
- 2☽︎ Moon06:10 – 07:18
- 3♄︎ Saturn07:18 – 08:26
- 4♃︎ Jupiter08:26 – 09:34
- 5♂︎ Mars09:34 – 10:42
- 6☉︎ Sun10:42 – 11:49
- 7♀︎ Venus11:49 – 12:57
- 8☿︎ Mercury12:57 – 14:05
- 9☽︎ Moon14:05 – 15:13
- 10♄︎ Saturn15:13 – 16:21
- 11♃︎ Jupiter16:21 – 17:29
- 12♂︎ Mars17:29 – 18:37
Night
- 1☉︎ Sun18:37 – 19:29
- 2♀︎ Venus19:29 – 20:21
- 3☿︎ Mercury20:21 – 21:13
- 4☽︎ Moon21:13 – 22:05
- 5♄︎ Saturn22:05 – 22:57
- 6♃︎ Jupiter22:57 – 23:49
- 7♂︎ Mars23:49 – 00:41
- 8☉︎ Sun00:41 – 01:33
- 9♀︎ Venus01:33 – 02:25
- 10☿︎ Mercury02:25 – 03:17
- 11☽︎ Moon03:17 – 04:09
- 12♄︎ Saturn04:09 – 05:01
Questions
How are the planetary hours calculated in Nagoya?
On Wednesday, 30 April 2025, the Sun rises at 05:02 and sets at 18:37: the day lasts 13h 35m, that is twelve day hours of 1h 08m. The night, until the next sunrise at 05:01, lasts 10h 24m: twelve night hours of 52 min.
Which planet rules the first hour that day?
Mercury, from 05:02 to 06:10: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Moon, Saturn, Jupiter, Mars, the Sun, Venus, then Mercury 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.