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, 18 July 2026: day of Saturn
- Sunrise
- 04:27
- Sunset
- 18:58
- Next sunrise
- 04:27
A day hour lasts 1h 13m; a night hour, 47 min. Local time (Asia/Tokyo).
Day
- 1♄︎ Saturn04:27 – 05:39
- 2♃︎ Jupiter05:39 – 06:52
- 3♂︎ Mars06:52 – 08:04
- 4☉︎ Sun08:04 – 09:17
- 5♀︎ Venus09:17 – 10:29
- 6☿︎ Mercury10:29 – 11:42
- 7☽︎ Moon11:42 – 12:55
- 8♄︎ Saturn12:55 – 14:07
- 9♃︎ Jupiter14:07 – 15:20
- 10♂︎ Mars15:20 – 16:32
- 11☉︎ Sun16:32 – 17:45
- 12♀︎ Venus17:45 – 18:58
Night
- 1☿︎ Mercury18:58 – 19:45
- 2☽︎ Moon19:45 – 20:32
- 3♄︎ Saturn20:32 – 21:20
- 4♃︎ Jupiter21:20 – 22:07
- 5♂︎ Mars22:07 – 22:55
- 6☉︎ Sun22:55 – 23:42
- 7♀︎ Venus23:42 – 00:30
- 8☿︎ Mercury00:30 – 01:17
- 9☽︎ Moon01:17 – 02:05
- 10♄︎ Saturn02:05 – 02:52
- 11♃︎ Jupiter02:52 – 03:40
- 12♂︎ Mars03:40 – 04:27
Questions
How are the planetary hours calculated in Sendai?
On Saturday, 18 July 2026, the Sun rises at 04:27 and sets at 18:58: the day lasts 14h 31m, that is twelve day hours of 1h 13m. The night, until the next sunrise at 04:27, lasts 9h 30m: twelve night hours of 47 min.
Which planet rules the first hour that day?
Saturn, from 04:27 to 05:39: 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.