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, 6 August 2026: day of Jupiter
- Sunrise
- 04:42
- Sunset
- 18:41
- Next sunrise
- 04:43
A day hour lasts 1h 10m; a night hour, 50 min. Local time (Asia/Tokyo).
Day
- 1♃︎ Jupiter04:42 – 05:52
- 2♂︎ Mars05:52 – 07:02
- 3☉︎ Sun07:02 – 08:12
- 4♀︎ Venus08:12 – 09:22
- 5☿︎ Mercury09:22 – 10:32
- 6☽︎ Moon10:32 – 11:42
- 7♄︎ Saturn11:42 – 12:52
- 8♃︎ Jupiter12:52 – 14:01
- 9♂︎ Mars14:01 – 15:11
- 10☉︎ Sun15:11 – 16:21
- 11♀︎ Venus16:21 – 17:31
- 12☿︎ Mercury17:31 – 18:41
Night
- 1☽︎ Moon18:41 – 19:31
- 2♄︎ Saturn19:31 – 20:21
- 3♃︎ Jupiter20:21 – 21:12
- 4♂︎ Mars21:12 – 22:02
- 5☉︎ Sun22:02 – 22:52
- 6♀︎ Venus22:52 – 23:42
- 7☿︎ Mercury23:42 – 00:32
- 8☽︎ Moon00:32 – 01:22
- 9♄︎ Saturn01:22 – 02:13
- 10♃︎ Jupiter02:13 – 03:03
- 11♂︎ Mars03:03 – 03:53
- 12☉︎ Sun03:53 – 04:43
Questions
How are the planetary hours calculated in Sendai?
On Thursday, 6 August 2026, the Sun rises at 04:42 and sets at 18:41: the day lasts 13h 59m, that is twelve day hours of 1h 10m. The night, until the next sunrise at 04:43, lasts 10h 02m: twelve night hours of 50 min.
Which planet rules the first hour that day?
Jupiter, from 04:42 to 05:52: 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.