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, 17 May 2026: day of the Sun
- Sunrise
- 04:24
- Sunset
- 18:42
- Next sunrise
- 04:23
A day hour lasts 1h 11m; a night hour, 48 min. Local time (Asia/Tokyo).
Day
- 1☉︎ Sun04:24 – 05:35
- 2♀︎ Venus05:35 – 06:47
- 3☿︎ Mercury06:47 – 07:58
- 4☽︎ Moon07:58 – 09:10
- 5♄︎ Saturn09:10 – 10:21
- 6♃︎ Jupiter10:21 – 11:33
- 7♂︎ Mars11:33 – 12:44
- 8☉︎ Sun12:44 – 13:56
- 9♀︎ Venus13:56 – 15:07
- 10☿︎ Mercury15:07 – 16:19
- 11☽︎ Moon16:19 – 17:30
- 12♄︎ Saturn17:30 – 18:42
Night
- 1♃︎ Jupiter18:42 – 19:30
- 2♂︎ Mars19:30 – 20:18
- 3☉︎ Sun20:18 – 21:07
- 4♀︎ Venus21:07 – 21:55
- 5☿︎ Mercury21:55 – 22:44
- 6☽︎ Moon22:44 – 23:32
- 7♄︎ Saturn23:32 – 00:21
- 8♃︎ Jupiter00:21 – 01:09
- 9♂︎ Mars01:09 – 01:58
- 10☉︎ Sun01:58 – 02:46
- 11♀︎ Venus02:46 – 03:35
- 12☿︎ Mercury03:35 – 04:23
Questions
How are the planetary hours calculated in Sendai?
On Sunday, 17 May 2026, the Sun rises at 04:24 and sets at 18:42: the day lasts 14h 18m, that is twelve day hours of 1h 11m. The night, until the next sunrise at 04:23, lasts 9h 41m: twelve night hours of 48 min.
Which planet rules the first hour that day?
The Sun, from 04:24 to 05:35: 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.