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, 27 August 2025: day of Mercury
- Sunrise
- 05:01
- Sunset
- 18:14
- Next sunrise
- 05:02
A day hour lasts 1h 06m; a night hour, 54 min. Local time (Asia/Tokyo).
Day
- 1☿︎ Mercury05:01 – 06:07
- 2☽︎ Moon06:07 – 07:13
- 3♄︎ Saturn07:13 – 08:19
- 4♃︎ Jupiter08:19 – 09:25
- 5♂︎ Mars09:25 – 10:31
- 6☉︎ Sun10:31 – 11:37
- 7♀︎ Venus11:37 – 12:43
- 8☿︎ Mercury12:43 – 13:49
- 9☽︎ Moon13:49 – 14:55
- 10♄︎ Saturn14:55 – 16:01
- 11♃︎ Jupiter16:01 – 17:08
- 12♂︎ Mars17:08 – 18:14
Night
- 1☉︎ Sun18:14 – 19:08
- 2♀︎ Venus19:08 – 20:02
- 3☿︎ Mercury20:02 – 20:56
- 4☽︎ Moon20:56 – 21:50
- 5♄︎ Saturn21:50 – 22:44
- 6♃︎ Jupiter22:44 – 23:38
- 7♂︎ Mars23:38 – 00:32
- 8☉︎ Sun00:32 – 01:26
- 9♀︎ Venus01:26 – 02:20
- 10☿︎ Mercury02:20 – 03:14
- 11☽︎ Moon03:14 – 04:08
- 12♄︎ Saturn04:08 – 05:02
Questions
How are the planetary hours calculated in Sendai?
On Wednesday, 27 August 2025, the Sun rises at 05:01 and sets at 18:14: the day lasts 13h 13m, that is twelve day hours of 1h 06m. The night, until the next sunrise at 05:02, lasts 10h 48m: twelve night hours of 54 min.
Which planet rules the first hour that day?
Mercury, from 05:01 to 06:07: 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.