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 Sunday, 10 August 2025: day of the Sun
- Sunrise
- 04:46
- Sunset
- 18:36
- Next sunrise
- 04:47
A day hour lasts 1h 09m; a night hour, 51 min. Local time (Asia/Tokyo).
Day
- 1☉︎ Sun04:46 – 05:55
- 2♀︎ Venus05:55 – 07:04
- 3☿︎ Mercury07:04 – 08:14
- 4☽︎ Moon08:14 – 09:23
- 5♄︎ Saturn09:23 – 10:32
- 6♃︎ Jupiter10:32 – 11:41
- 7♂︎ Mars11:41 – 12:50
- 8☉︎ Sun12:50 – 13:59
- 9♀︎ Venus13:59 – 15:09
- 10☿︎ Mercury15:09 – 16:18
- 11☽︎ Moon16:18 – 17:27
- 12♄︎ Saturn17:27 – 18:36
Night
- 1♃︎ Jupiter18:36 – 19:27
- 2♂︎ Mars19:27 – 20:18
- 3☉︎ Sun20:18 – 21:09
- 4♀︎ Venus21:09 – 22:00
- 5☿︎ Mercury22:00 – 22:51
- 6☽︎ Moon22:51 – 23:42
- 7♄︎ Saturn23:42 – 00:32
- 8♃︎ Jupiter00:32 – 01:23
- 9♂︎ Mars01:23 – 02:14
- 10☉︎ Sun02:14 – 03:05
- 11♀︎ Venus03:05 – 03:56
- 12☿︎ Mercury03:56 – 04:47
Questions
How are the planetary hours calculated in Sendai?
On Sunday, 10 August 2025, the Sun rises at 04:46 and sets at 18:36: the day lasts 13h 50m, that is twelve day hours of 1h 09m. The night, until the next sunrise at 04:47, lasts 10h 11m: twelve night hours of 51 min.
Which planet rules the first hour that day?
The Sun, from 04:46 to 05:55: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Venus, Mercury, the Moon, Saturn, Jupiter, Mars, then the Sun 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.