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 Sunday, 17 May 2026: day of the Sun
- Sunrise
- 04:47
- Sunset
- 18:50
- Next sunrise
- 04:46
A day hour lasts 1h 10m; a night hour, 50 min. Local time (Asia/Tokyo).
Day
- 1☉︎ Sun04:47 – 05:57
- 2♀︎ Venus05:57 – 07:07
- 3☿︎ Mercury07:07 – 08:18
- 4☽︎ Moon08:18 – 09:28
- 5♄︎ Saturn09:28 – 10:38
- 6♃︎ Jupiter10:38 – 11:48
- 7♂︎ Mars11:48 – 12:59
- 8☉︎ Sun12:59 – 14:09
- 9♀︎ Venus14:09 – 15:19
- 10☿︎ Mercury15:19 – 16:30
- 11☽︎ Moon16:30 – 17:40
- 12♄︎ Saturn17:40 – 18:50
Night
- 1♃︎ Jupiter18:50 – 19:40
- 2♂︎ Mars19:40 – 20:29
- 3☉︎ Sun20:29 – 21:19
- 4♀︎ Venus21:19 – 22:09
- 5☿︎ Mercury22:09 – 22:58
- 6☽︎ Moon22:58 – 23:48
- 7♄︎ Saturn23:48 – 00:38
- 8♃︎ Jupiter00:38 – 01:27
- 9♂︎ Mars01:27 – 02:17
- 10☉︎ Sun02:17 – 03:07
- 11♀︎ Venus03:07 – 03:56
- 12☿︎ Mercury03:56 – 04:46
Questions
How are the planetary hours calculated in Nagoya?
On Sunday, 17 May 2026, the Sun rises at 04:47 and sets at 18:50: the day lasts 14h 03m, that is twelve day hours of 1h 10m. The night, until the next sunrise at 04:46, lasts 9h 56m: twelve night hours of 50 min.
Which planet rules the first hour that day?
The Sun, from 04:47 to 05:57: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Venus, Mercury, the Moon, Saturn, Jupiter, Mars, then the Sun 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.