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 Saturday, 15 August 2026: day of Saturn
- Sunrise
- 05:11
- Sunset
- 18:41
- Next sunrise
- 05:12
A day hour lasts 1h 07m; a night hour, 53 min. Local time (Asia/Tokyo).
Day
- 1♄︎ Saturn05:11 – 06:19
- 2♃︎ Jupiter06:19 – 07:26
- 3♂︎ Mars07:26 – 08:34
- 4☉︎ Sun08:34 – 09:41
- 5♀︎ Venus09:41 – 10:49
- 6☿︎ Mercury10:49 – 11:56
- 7☽︎ Moon11:56 – 13:04
- 8♄︎ Saturn13:04 – 14:11
- 9♃︎ Jupiter14:11 – 15:19
- 10♂︎ Mars15:19 – 16:26
- 11☉︎ Sun16:26 – 17:34
- 12♀︎ Venus17:34 – 18:41
Night
- 1☿︎ Mercury18:41 – 19:34
- 2☽︎ Moon19:34 – 20:26
- 3♄︎ Saturn20:26 – 21:19
- 4♃︎ Jupiter21:19 – 22:11
- 5♂︎ Mars22:11 – 23:04
- 6☉︎ Sun23:04 – 23:57
- 7♀︎ Venus23:57 – 00:49
- 8☿︎ Mercury00:49 – 01:42
- 9☽︎ Moon01:42 – 02:34
- 10♄︎ Saturn02:34 – 03:27
- 11♃︎ Jupiter03:27 – 04:19
- 12♂︎ Mars04:19 – 05:12
Questions
How are the planetary hours calculated in Nagoya?
On Saturday, 15 August 2026, the Sun rises at 05:11 and sets at 18:41: the day lasts 13h 30m, that is twelve day hours of 1h 07m. The night, until the next sunrise at 05:12, lasts 10h 31m: twelve night hours of 53 min.
Which planet rules the first hour that day?
Saturn, from 05:11 to 06:19: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn 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.