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, 2 May 2025: day of Venus
- Sunrise
- 04:39
- Sunset
- 18:28
- Next sunrise
- 04:37
A day hour lasts 1h 09m; a night hour, 51 min. Local time (Asia/Tokyo).
Day
- 1♀︎ Venus04:39 – 05:48
- 2☿︎ Mercury05:48 – 06:57
- 3☽︎ Moon06:57 – 08:06
- 4♄︎ Saturn08:06 – 09:15
- 5♃︎ Jupiter09:15 – 10:24
- 6♂︎ Mars10:24 – 11:33
- 7☉︎ Sun11:33 – 12:42
- 8♀︎ Venus12:42 – 13:52
- 9☿︎ Mercury13:52 – 15:01
- 10☽︎ Moon15:01 – 16:10
- 11♄︎ Saturn16:10 – 17:19
- 12♃︎ Jupiter17:19 – 18:28
Night
- 1♂︎ Mars18:28 – 19:19
- 2☉︎ Sun19:19 – 20:10
- 3♀︎ Venus20:10 – 21:00
- 4☿︎ Mercury21:00 – 21:51
- 5☽︎ Moon21:51 – 22:42
- 6♄︎ Saturn22:42 – 23:33
- 7♃︎ Jupiter23:33 – 00:24
- 8♂︎ Mars00:24 – 01:14
- 9☉︎ Sun01:14 – 02:05
- 10♀︎ Venus02:05 – 02:56
- 11☿︎ Mercury02:56 – 03:47
- 12☽︎ Moon03:47 – 04:37
Questions
How are the planetary hours calculated in Sendai?
On Friday, 2 May 2025, the Sun rises at 04:39 and sets at 18:28: the day lasts 13h 50m, that is twelve day hours of 1h 09m. The night, until the next sunrise at 04:37, lasts 10h 09m: twelve night hours of 51 min.
Which planet rules the first hour that day?
Venus, from 04:39 to 05:48: 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.