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, 18 October 2026: day of the Sun
- Sunrise
- 05:47
- Sunset
- 16:55
- Next sunrise
- 05:48
A day hour lasts 56 min; a night hour, 1h 04m. Local time (Asia/Tokyo).
Day
- 1☉︎ Sun05:47 – 06:43
- 2♀︎ Venus06:43 – 07:38
- 3☿︎ Mercury07:38 – 08:34
- 4☽︎ Moon08:34 – 09:30
- 5♄︎ Saturn09:30 – 10:25
- 6♃︎ Jupiter10:25 – 11:21
- 7♂︎ Mars11:21 – 12:17
- 8☉︎ Sun12:17 – 13:12
- 9♀︎ Venus13:12 – 14:08
- 10☿︎ Mercury14:08 – 15:03
- 11☽︎ Moon15:03 – 15:59
- 12♄︎ Saturn15:59 – 16:55
Night
- 1♃︎ Jupiter16:55 – 17:59
- 2♂︎ Mars17:59 – 19:04
- 3☉︎ Sun19:04 – 20:08
- 4♀︎ Venus20:08 – 21:13
- 5☿︎ Mercury21:13 – 22:17
- 6☽︎ Moon22:17 – 23:21
- 7♄︎ Saturn23:21 – 00:26
- 8♃︎ Jupiter00:26 – 01:30
- 9♂︎ Mars01:30 – 02:35
- 10☉︎ Sun02:35 – 03:39
- 11♀︎ Venus03:39 – 04:44
- 12☿︎ Mercury04:44 – 05:48
Questions
How are the planetary hours calculated in Sendai?
On Sunday, 18 October 2026, the Sun rises at 05:47 and sets at 16:55: the day lasts 11h 07m, that is twelve day hours of 56 min. The night, until the next sunrise at 05:48, lasts 12h 54m: twelve night hours of 1h 04m.
Which planet rules the first hour that day?
The Sun, from 05:47 to 06:43: 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.