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 Friday, 15 May 2026: day of Venus
- Sunrise
- 04:25
- Sunset
- 18:40
- Next sunrise
- 04:25
A day hour lasts 1h 11m; a night hour, 49 min. Local time (Asia/Tokyo).
Day
- 1♀︎ Venus04:25 – 05:37
- 2☿︎ Mercury05:37 – 06:48
- 3☽︎ Moon06:48 – 07:59
- 4♄︎ Saturn07:59 – 09:10
- 5♃︎ Jupiter09:10 – 10:21
- 6♂︎ Mars10:21 – 11:33
- 7☉︎ Sun11:33 – 12:44
- 8♀︎ Venus12:44 – 13:55
- 9☿︎ Mercury13:55 – 15:06
- 10☽︎ Moon15:06 – 16:17
- 11♄︎ Saturn16:17 – 17:29
- 12♃︎ Jupiter17:29 – 18:40
Night
- 1♂︎ Mars18:40 – 19:29
- 2☉︎ Sun19:29 – 20:17
- 3♀︎ Venus20:17 – 21:06
- 4☿︎ Mercury21:06 – 21:55
- 5☽︎ Moon21:55 – 22:43
- 6♄︎ Saturn22:43 – 23:32
- 7♃︎ Jupiter23:32 – 00:21
- 8♂︎ Mars00:21 – 01:10
- 9☉︎ Sun01:10 – 01:58
- 10♀︎ Venus01:58 – 02:47
- 11☿︎ Mercury02:47 – 03:36
- 12☽︎ Moon03:36 – 04:25
Questions
How are the planetary hours calculated in Sendai?
On Friday, 15 May 2026, the Sun rises at 04:25 and sets at 18:40: the day lasts 14h 14m, that is twelve day hours of 1h 11m. The night, until the next sunrise at 04:25, lasts 9h 45m: twelve night hours of 49 min.
Which planet rules the first hour that day?
Venus, from 04:25 to 05:37: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mercury, the Moon, Saturn, Jupiter, Mars, the Sun, then Venus 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.