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, 31 July 2026: day of Venus
- Sunrise
- 04:37
- Sunset
- 18:47
- Next sunrise
- 04:38
A day hour lasts 1h 11m; a night hour, 49 min. Local time (Asia/Tokyo).
Day
- 1♀︎ Venus04:37 – 05:48
- 2☿︎ Mercury05:48 – 06:59
- 3☽︎ Moon06:59 – 08:10
- 4♄︎ Saturn08:10 – 09:21
- 5♃︎ Jupiter09:21 – 10:31
- 6♂︎ Mars10:31 – 11:42
- 7☉︎ Sun11:42 – 12:53
- 8♀︎ Venus12:53 – 14:04
- 9☿︎ Mercury14:04 – 15:15
- 10☽︎ Moon15:15 – 16:26
- 11♄︎ Saturn16:26 – 17:36
- 12♃︎ Jupiter17:36 – 18:47
Night
- 1♂︎ Mars18:47 – 19:36
- 2☉︎ Sun19:36 – 20:26
- 3♀︎ Venus20:26 – 21:15
- 4☿︎ Mercury21:15 – 22:04
- 5☽︎ Moon22:04 – 22:53
- 6♄︎ Saturn22:53 – 23:43
- 7♃︎ Jupiter23:43 – 00:32
- 8♂︎ Mars00:32 – 01:21
- 9☉︎ Sun01:21 – 02:10
- 10♀︎ Venus02:10 – 03:00
- 11☿︎ Mercury03:00 – 03:49
- 12☽︎ Moon03:49 – 04:38
Questions
How are the planetary hours calculated in Sendai?
On Friday, 31 July 2026, the Sun rises at 04:37 and sets at 18:47: the day lasts 14h 10m, that is twelve day hours of 1h 11m. The night, until the next sunrise at 04:38, lasts 9h 51m: twelve night hours of 49 min.
Which planet rules the first hour that day?
Venus, from 04:37 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.