Planetary hours
in Sendai.
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 Monday, 19 May 2025: day of the Moon
- Sunrise
- 04:22
- Sunset
- 18:43
- Next sunrise
- 04:21
A day hour lasts 1h 12m; a night hour, 48 min. Local time (Asia/Tokyo).
Day
- 1☽︎ Moon04:22 – 05:34
- 2♄︎ Saturn05:34 – 06:46
- 3♃︎ Jupiter06:46 – 07:57
- 4♂︎ Mars07:57 – 09:09
- 5☉︎ Sun09:09 – 10:21
- 6♀︎ Venus10:21 – 11:33
- 7☿︎ Mercury11:33 – 12:45
- 8☽︎ Moon12:45 – 13:56
- 9♄︎ Saturn13:56 – 15:08
- 10♃︎ Jupiter15:08 – 16:20
- 11♂︎ Mars16:20 – 17:32
- 12☉︎ Sun17:32 – 18:43
Night
- 1♀︎ Venus18:43 – 19:32
- 2☿︎ Mercury19:32 – 20:20
- 3☽︎ Moon20:20 – 21:08
- 4♄︎ Saturn21:08 – 21:56
- 5♃︎ Jupiter21:56 – 22:44
- 6♂︎ Mars22:44 – 23:32
- 7☉︎ Sun23:32 – 00:21
- 8♀︎ Venus00:21 – 01:09
- 9☿︎ Mercury01:09 – 01:57
- 10☽︎ Moon01:57 – 02:45
- 11♄︎ Saturn02:45 – 03:33
- 12♃︎ Jupiter03:33 – 04:21
Questions
How are the planetary hours calculated in Sendai?
On Monday, 19 May 2025, the Sun rises at 04:22 and sets at 18:43: the day lasts 14h 21m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 04:21, lasts 9h 38m: twelve night hours of 48 min.
Which planet rules the first hour that day?
The Moon, from 04:22 to 05:34: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Saturn, Jupiter, Mars, the Sun, Venus, Mercury, then the Moon 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.