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, 1 August 2026: day of Saturn
- Sunrise
- 04:38
- Sunset
- 18:46
- Next sunrise
- 04:39
A day hour lasts 1h 11m; a night hour, 49 min. Local time (Asia/Tokyo).
Day
- 1♄︎ Saturn04:38 – 05:49
- 2♃︎ Jupiter05:49 – 06:59
- 3♂︎ Mars06:59 – 08:10
- 4☉︎ Sun08:10 – 09:21
- 5♀︎ Venus09:21 – 10:31
- 6☿︎ Mercury10:31 – 11:42
- 7☽︎ Moon11:42 – 12:53
- 8♄︎ Saturn12:53 – 14:04
- 9♃︎ Jupiter14:04 – 15:14
- 10♂︎ Mars15:14 – 16:25
- 11☉︎ Sun16:25 – 17:36
- 12♀︎ Venus17:36 – 18:46
Night
- 1☿︎ Mercury18:46 – 19:36
- 2☽︎ Moon19:36 – 20:25
- 3♄︎ Saturn20:25 – 21:14
- 4♃︎ Jupiter21:14 – 22:04
- 5♂︎ Mars22:04 – 22:53
- 6☉︎ Sun22:53 – 23:43
- 7♀︎ Venus23:43 – 00:32
- 8☿︎ Mercury00:32 – 01:21
- 9☽︎ Moon01:21 – 02:11
- 10♄︎ Saturn02:11 – 03:00
- 11♃︎ Jupiter03:00 – 03:49
- 12♂︎ Mars03:49 – 04:39
Questions
How are the planetary hours calculated in Sendai?
On Saturday, 1 August 2026, the Sun rises at 04:38 and sets at 18:46: the day lasts 14h 08m, that is twelve day hours of 1h 11m. The night, until the next sunrise at 04:39, lasts 9h 53m: twelve night hours of 49 min.
Which planet rules the first hour that day?
Saturn, from 04:38 to 05:49: 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.