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, 9 May 2025: day of Venus
- Sunrise
- 04:31
- Sunset
- 18:35
- Next sunrise
- 04:30
A day hour lasts 1h 10m; a night hour, 50 min. Local time (Asia/Tokyo).
Day
- 1♀︎ Venus04:31 – 05:41
- 2☿︎ Mercury05:41 – 06:52
- 3☽︎ Moon06:52 – 08:02
- 4♄︎ Saturn08:02 – 09:12
- 5♃︎ Jupiter09:12 – 10:22
- 6♂︎ Mars10:22 – 11:33
- 7☉︎ Sun11:33 – 12:43
- 8♀︎ Venus12:43 – 13:53
- 9☿︎ Mercury13:53 – 15:04
- 10☽︎ Moon15:04 – 16:14
- 11♄︎ Saturn16:14 – 17:24
- 12♃︎ Jupiter17:24 – 18:35
Night
- 1♂︎ Mars18:35 – 19:24
- 2☉︎ Sun19:24 – 20:14
- 3♀︎ Venus20:14 – 21:03
- 4☿︎ Mercury21:03 – 21:53
- 5☽︎ Moon21:53 – 22:43
- 6♄︎ Saturn22:43 – 23:32
- 7♃︎ Jupiter23:32 – 00:22
- 8♂︎ Mars00:22 – 01:11
- 9☉︎ Sun01:11 – 02:01
- 10♀︎ Venus02:01 – 02:51
- 11☿︎ Mercury02:51 – 03:40
- 12☽︎ Moon03:40 – 04:30
Questions
How are the planetary hours calculated in Sendai?
On Friday, 9 May 2025, the Sun rises at 04:31 and sets at 18:35: the day lasts 14h 04m, that is twelve day hours of 1h 10m. The night, until the next sunrise at 04:30, lasts 9h 55m: twelve night hours of 50 min.
Which planet rules the first hour that day?
Venus, from 04:31 to 05:41: 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.