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, 6 October 2025: day of the Moon
- Sunrise
- 05:36
- Sunset
- 17:12
- Next sunrise
- 05:37
A day hour lasts 58 min; a night hour, 1h 02m. Local time (Asia/Tokyo).
Day
- 1☽︎ Moon05:36 – 06:34
- 2♄︎ Saturn06:34 – 07:32
- 3♃︎ Jupiter07:32 – 08:30
- 4♂︎ Mars08:30 – 09:28
- 5☉︎ Sun09:28 – 10:26
- 6♀︎ Venus10:26 – 11:24
- 7☿︎ Mercury11:24 – 12:22
- 8☽︎ Moon12:22 – 13:20
- 9♄︎ Saturn13:20 – 14:18
- 10♃︎ Jupiter14:18 – 15:16
- 11♂︎ Mars15:16 – 16:14
- 12☉︎ Sun16:14 – 17:12
Night
- 1♀︎ Venus17:12 – 18:14
- 2☿︎ Mercury18:14 – 19:16
- 3☽︎ Moon19:16 – 20:18
- 4♄︎ Saturn20:18 – 21:20
- 5♃︎ Jupiter21:20 – 22:22
- 6♂︎ Mars22:22 – 23:24
- 7☉︎ Sun23:24 – 00:26
- 8♀︎ Venus00:26 – 01:29
- 9☿︎ Mercury01:29 – 02:31
- 10☽︎ Moon02:31 – 03:33
- 11♄︎ Saturn03:33 – 04:35
- 12♃︎ Jupiter04:35 – 05:37
Questions
How are the planetary hours calculated in Sendai?
On Monday, 6 October 2025, the Sun rises at 05:36 and sets at 17:12: the day lasts 11h 36m, that is twelve day hours of 58 min. The night, until the next sunrise at 05:37, lasts 12h 25m: twelve night hours of 1h 02m.
Which planet rules the first hour that day?
The Moon, from 05:36 to 06:34: 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.