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, 23 August 2026: day of the Sun
- Sunrise
- 04:57
- Sunset
- 18:20
- Next sunrise
- 04:58
A day hour lasts 1h 07m; a night hour, 53 min. Local time (Asia/Tokyo).
Day
- 1☉︎ Sun04:57 – 06:04
- 2♀︎ Venus06:04 – 07:11
- 3☿︎ Mercury07:11 – 08:18
- 4☽︎ Moon08:18 – 09:25
- 5♄︎ Saturn09:25 – 10:32
- 6♃︎ Jupiter10:32 – 11:38
- 7♂︎ Mars11:38 – 12:45
- 8☉︎ Sun12:45 – 13:52
- 9♀︎ Venus13:52 – 14:59
- 10☿︎ Mercury14:59 – 16:06
- 11☽︎ Moon16:06 – 17:13
- 12♄︎ Saturn17:13 – 18:20
Night
- 1♃︎ Jupiter18:20 – 19:13
- 2♂︎ Mars19:13 – 20:06
- 3☉︎ Sun20:06 – 20:59
- 4♀︎ Venus20:59 – 21:52
- 5☿︎ Mercury21:52 – 22:46
- 6☽︎ Moon22:46 – 23:39
- 7♄︎ Saturn23:39 – 00:32
- 8♃︎ Jupiter00:32 – 01:25
- 9♂︎ Mars01:25 – 02:19
- 10☉︎ Sun02:19 – 03:12
- 11♀︎ Venus03:12 – 04:05
- 12☿︎ Mercury04:05 – 04:58
Questions
How are the planetary hours calculated in Sendai?
On Sunday, 23 August 2026, the Sun rises at 04:57 and sets at 18:20: the day lasts 13h 22m, that is twelve day hours of 1h 07m. The night, until the next sunrise at 04:58, lasts 10h 39m: twelve night hours of 53 min.
Which planet rules the first hour that day?
The Sun, from 04:57 to 06:04: 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.