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 Thursday, 28 May 2026: day of Jupiter
- Sunrise
- 04:16
- Sunset
- 18:51
- Next sunrise
- 04:16
A day hour lasts 1h 13m; a night hour, 47 min. Local time (Asia/Tokyo).
Day
- 1♃︎ Jupiter04:16 – 05:29
- 2♂︎ Mars05:29 – 06:42
- 3☉︎ Sun06:42 – 07:55
- 4♀︎ Venus07:55 – 09:08
- 5☿︎ Mercury09:08 – 10:21
- 6☽︎ Moon10:21 – 11:33
- 7♄︎ Saturn11:33 – 12:46
- 8♃︎ Jupiter12:46 – 13:59
- 9♂︎ Mars13:59 – 15:12
- 10☉︎ Sun15:12 – 16:25
- 11♀︎ Venus16:25 – 17:38
- 12☿︎ Mercury17:38 – 18:51
Night
- 1☽︎ Moon18:51 – 19:38
- 2♄︎ Saturn19:38 – 20:25
- 3♃︎ Jupiter20:25 – 21:12
- 4♂︎ Mars21:12 – 21:59
- 5☉︎ Sun21:59 – 22:46
- 6♀︎ Venus22:46 – 23:33
- 7☿︎ Mercury23:33 – 00:20
- 8☽︎ Moon00:20 – 01:07
- 9♄︎ Saturn01:07 – 01:55
- 10♃︎ Jupiter01:55 – 02:42
- 11♂︎ Mars02:42 – 03:29
- 12☉︎ Sun03:29 – 04:16
Questions
How are the planetary hours calculated in Sendai?
On Thursday, 28 May 2026, the Sun rises at 04:16 and sets at 18:51: the day lasts 14h 34m, that is twelve day hours of 1h 13m. The night, until the next sunrise at 04:16, lasts 9h 25m: twelve night hours of 47 min.
Which planet rules the first hour that day?
Jupiter, from 04:16 to 05:29: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mars, the Sun, Venus, Mercury, the Moon, Saturn, then Jupiter 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.