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, 24 April 2025: day of Jupiter
- Sunrise
- 04:48
- Sunset
- 18:21
- Next sunrise
- 04:47
A day hour lasts 1h 08m; a night hour, 52 min. Local time (Asia/Tokyo).
Day
- 1♃︎ Jupiter04:48 – 05:56
- 2♂︎ Mars05:56 – 07:04
- 3☉︎ Sun07:04 – 08:11
- 4♀︎ Venus08:11 – 09:19
- 5☿︎ Mercury09:19 – 10:27
- 6☽︎ Moon10:27 – 11:35
- 7♄︎ Saturn11:35 – 12:42
- 8♃︎ Jupiter12:42 – 13:50
- 9♂︎ Mars13:50 – 14:58
- 10☉︎ Sun14:58 – 16:05
- 11♀︎ Venus16:05 – 17:13
- 12☿︎ Mercury17:13 – 18:21
Night
- 1☽︎ Moon18:21 – 19:13
- 2♄︎ Saturn19:13 – 20:05
- 3♃︎ Jupiter20:05 – 20:57
- 4♂︎ Mars20:57 – 21:49
- 5☉︎ Sun21:49 – 22:42
- 6♀︎ Venus22:42 – 23:34
- 7☿︎ Mercury23:34 – 00:26
- 8☽︎ Moon00:26 – 01:18
- 9♄︎ Saturn01:18 – 02:11
- 10♃︎ Jupiter02:11 – 03:03
- 11♂︎ Mars03:03 – 03:55
- 12☉︎ Sun03:55 – 04:47
Questions
How are the planetary hours calculated in Sendai?
On Thursday, 24 April 2025, the Sun rises at 04:48 and sets at 18:21: the day lasts 13h 32m, that is twelve day hours of 1h 08m. The night, until the next sunrise at 04:47, lasts 10h 27m: twelve night hours of 52 min.
Which planet rules the first hour that day?
Jupiter, from 04:48 to 05:56: 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.