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, 29 April 2026: day of Mercury
- Sunrise
- 04:42
- Sunset
- 18:25
- Next sunrise
- 04:41
A day hour lasts 1h 09m; a night hour, 51 min. Local time (Asia/Tokyo).
Day
- 1☿︎ Mercury04:42 – 05:51
- 2☽︎ Moon05:51 – 07:00
- 3♄︎ Saturn07:00 – 08:08
- 4♃︎ Jupiter08:08 – 09:17
- 5♂︎ Mars09:17 – 10:25
- 6☉︎ Sun10:25 – 11:34
- 7♀︎ Venus11:34 – 12:42
- 8☿︎ Mercury12:42 – 13:51
- 9☽︎ Moon13:51 – 14:59
- 10♄︎ Saturn14:59 – 16:08
- 11♃︎ Jupiter16:08 – 17:17
- 12♂︎ Mars17:17 – 18:25
Night
- 1☉︎ Sun18:25 – 19:16
- 2♀︎ Venus19:16 – 20:08
- 3☿︎ Mercury20:08 – 20:59
- 4☽︎ Moon20:59 – 21:50
- 5♄︎ Saturn21:50 – 22:42
- 6♃︎ Jupiter22:42 – 23:33
- 7♂︎ Mars23:33 – 00:24
- 8☉︎ Sun00:24 – 01:16
- 9♀︎ Venus01:16 – 02:07
- 10☿︎ Mercury02:07 – 02:59
- 11☽︎ Moon02:59 – 03:50
- 12♄︎ Saturn03:50 – 04:41
Questions
How are the planetary hours calculated in Sendai?
On Wednesday, 29 April 2026, the Sun rises at 04:42 and sets at 18:25: the day lasts 13h 43m, that is twelve day hours of 1h 09m. The night, until the next sunrise at 04:41, lasts 10h 16m: twelve night hours of 51 min.
Which planet rules the first hour that day?
Mercury, from 04:42 to 05:51: 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.