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 Saturday, 26 July 2025: day of Saturn
- Sunrise
- 04:33
- Sunset
- 18:52
- Next sunrise
- 04:34
A day hour lasts 1h 12m; a night hour, 49 min. Local time (Asia/Tokyo).
Day
- 1♄︎ Saturn04:33 – 05:45
- 2♃︎ Jupiter05:45 – 06:56
- 3♂︎ Mars06:56 – 08:08
- 4☉︎ Sun08:08 – 09:19
- 5♀︎ Venus09:19 – 10:31
- 6☿︎ Mercury10:31 – 11:42
- 7☽︎ Moon11:42 – 12:54
- 8♄︎ Saturn12:54 – 14:05
- 9♃︎ Jupiter14:05 – 15:17
- 10♂︎ Mars15:17 – 16:28
- 11☉︎ Sun16:28 – 17:40
- 12♀︎ Venus17:40 – 18:52
Night
- 1☿︎ Mercury18:52 – 19:40
- 2☽︎ Moon19:40 – 20:29
- 3♄︎ Saturn20:29 – 21:17
- 4♃︎ Jupiter21:17 – 22:06
- 5♂︎ Mars22:06 – 22:54
- 6☉︎ Sun22:54 – 23:43
- 7♀︎ Venus23:43 – 00:31
- 8☿︎ Mercury00:31 – 01:20
- 9☽︎ Moon01:20 – 02:08
- 10♄︎ Saturn02:08 – 02:57
- 11♃︎ Jupiter02:57 – 03:45
- 12♂︎ Mars03:45 – 04:34
Questions
How are the planetary hours calculated in Sendai?
On Saturday, 26 July 2025, the Sun rises at 04:33 and sets at 18:52: the day lasts 14h 18m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 04:34, lasts 9h 42m: twelve night hours of 49 min.
Which planet rules the first hour that day?
Saturn, from 04:33 to 05:45: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn 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.