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, 12 August 2026: day of Mercury
- Sunrise
- 05:09
- Sunset
- 18:44
- Next sunrise
- 05:10
A day hour lasts 1h 08m; a night hour, 52 min. Local time (Asia/Tokyo).
Day
- 1☿︎ Mercury05:09 – 06:17
- 2☽︎ Moon06:17 – 07:25
- 3♄︎ Saturn07:25 – 08:33
- 4♃︎ Jupiter08:33 – 09:41
- 5♂︎ Mars09:41 – 10:49
- 6☉︎ Sun10:49 – 11:57
- 7♀︎ Venus11:57 – 13:05
- 8☿︎ Mercury13:05 – 14:13
- 9☽︎ Moon14:13 – 15:21
- 10♄︎ Saturn15:21 – 16:29
- 11♃︎ Jupiter16:29 – 17:37
- 12♂︎ Mars17:37 – 18:44
Night
- 1☉︎ Sun18:44 – 19:37
- 2♀︎ Venus19:37 – 20:29
- 3☿︎ Mercury20:29 – 21:21
- 4☽︎ Moon21:21 – 22:13
- 5♄︎ Saturn22:13 – 23:05
- 6♃︎ Jupiter23:05 – 23:57
- 7♂︎ Mars23:57 – 00:49
- 8☉︎ Sun00:49 – 01:41
- 9♀︎ Venus01:41 – 02:33
- 10☿︎ Mercury02:33 – 03:26
- 11☽︎ Moon03:26 – 04:18
- 12♄︎ Saturn04:18 – 05:10
Questions
How are the planetary hours calculated in Nagoya?
On Wednesday, 12 August 2026, the Sun rises at 05:09 and sets at 18:44: the day lasts 13h 36m, that is twelve day hours of 1h 08m. The night, until the next sunrise at 05:10, lasts 10h 25m: twelve night hours of 52 min.
Which planet rules the first hour that day?
Mercury, from 05:09 to 06:17: 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.