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, 25 May 2026: day of the Moon
- Sunrise
- 04:18
- Sunset
- 18:48
- Next sunrise
- 04:18
A day hour lasts 1h 13m; a night hour, 47 min. Local time (Asia/Tokyo).
Day
- 1☽︎ Moon04:18 – 05:31
- 2♄︎ Saturn05:31 – 06:43
- 3♃︎ Jupiter06:43 – 07:56
- 4♂︎ Mars07:56 – 09:08
- 5☉︎ Sun09:08 – 10:21
- 6♀︎ Venus10:21 – 11:33
- 7☿︎ Mercury11:33 – 12:46
- 8☽︎ Moon12:46 – 13:58
- 9♄︎ Saturn13:58 – 15:11
- 10♃︎ Jupiter15:11 – 16:23
- 11♂︎ Mars16:23 – 17:36
- 12☉︎ Sun17:36 – 18:48
Night
- 1♀︎ Venus18:48 – 19:36
- 2☿︎ Mercury19:36 – 20:23
- 3☽︎ Moon20:23 – 21:11
- 4♄︎ Saturn21:11 – 21:58
- 5♃︎ Jupiter21:58 – 22:45
- 6♂︎ Mars22:45 – 23:33
- 7☉︎ Sun23:33 – 00:20
- 8♀︎ Venus00:20 – 01:08
- 9☿︎ Mercury01:08 – 01:55
- 10☽︎ Moon01:55 – 02:43
- 11♄︎ Saturn02:43 – 03:30
- 12♃︎ Jupiter03:30 – 04:18
Questions
How are the planetary hours calculated in Sendai?
On Monday, 25 May 2026, the Sun rises at 04:18 and sets at 18:48: the day lasts 14h 30m, that is twelve day hours of 1h 13m. The night, until the next sunrise at 04:18, lasts 9h 29m: twelve night hours of 47 min.
Which planet rules the first hour that day?
The Moon, from 04:18 to 05:31: 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.