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 Wednesday, 23 July 2025: day of Mercury
- Sunrise
- 04:31
- Sunset
- 18:54
- Next sunrise
- 04:31
A day hour lasts 1h 12m; a night hour, 48 min. Local time (Asia/Tokyo).
Day
- 1☿︎ Mercury04:31 – 05:43
- 2☽︎ Moon05:43 – 06:55
- 3♄︎ Saturn06:55 – 08:06
- 4♃︎ Jupiter08:06 – 09:18
- 5♂︎ Mars09:18 – 10:30
- 6☉︎ Sun10:30 – 11:42
- 7♀︎ Venus11:42 – 12:54
- 8☿︎ Mercury12:54 – 14:06
- 9☽︎ Moon14:06 – 15:18
- 10♄︎ Saturn15:18 – 16:30
- 11♃︎ Jupiter16:30 – 17:42
- 12♂︎ Mars17:42 – 18:54
Night
- 1☉︎ Sun18:54 – 19:42
- 2♀︎ Venus19:42 – 20:30
- 3☿︎ Mercury20:30 – 21:18
- 4☽︎ Moon21:18 – 22:06
- 5♄︎ Saturn22:06 – 22:55
- 6♃︎ Jupiter22:55 – 23:43
- 7♂︎ Mars23:43 – 00:31
- 8☉︎ Sun00:31 – 01:19
- 9♀︎ Venus01:19 – 02:07
- 10☿︎ Mercury02:07 – 02:55
- 11☽︎ Moon02:55 – 03:43
- 12♄︎ Saturn03:43 – 04:31
Questions
How are the planetary hours calculated in Sendai?
On Wednesday, 23 July 2025, the Sun rises at 04:31 and sets at 18:54: the day lasts 14h 23m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 04:31, lasts 9h 38m: twelve night hours of 48 min.
Which planet rules the first hour that day?
Mercury, from 04:31 to 05:43: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Moon, Saturn, Jupiter, Mars, the Sun, Venus, then Mercury 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.