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, 17 July 2026: day of Venus
- Sunrise
- 04:26
- Sunset
- 18:58
- Next sunrise
- 04:27
A day hour lasts 1h 13m; a night hour, 47 min. Local time (Asia/Tokyo).
Day
- 1♀︎ Venus04:26 – 05:39
- 2☿︎ Mercury05:39 – 06:51
- 3☽︎ Moon06:51 – 08:04
- 4♄︎ Saturn08:04 – 09:17
- 5♃︎ Jupiter09:17 – 10:29
- 6♂︎ Mars10:29 – 11:42
- 7☉︎ Sun11:42 – 12:55
- 8♀︎ Venus12:55 – 14:07
- 9☿︎ Mercury14:07 – 15:20
- 10☽︎ Moon15:20 – 16:33
- 11♄︎ Saturn16:33 – 17:45
- 12♃︎ Jupiter17:45 – 18:58
Night
- 1♂︎ Mars18:58 – 19:45
- 2☉︎ Sun19:45 – 20:33
- 3♀︎ Venus20:33 – 21:20
- 4☿︎ Mercury21:20 – 22:08
- 5☽︎ Moon22:08 – 22:55
- 6♄︎ Saturn22:55 – 23:42
- 7♃︎ Jupiter23:42 – 00:30
- 8♂︎ Mars00:30 – 01:17
- 9☉︎ Sun01:17 – 02:04
- 10♀︎ Venus02:04 – 02:52
- 11☿︎ Mercury02:52 – 03:39
- 12☽︎ Moon03:39 – 04:27
Questions
How are the planetary hours calculated in Sendai?
On Friday, 17 July 2026, the Sun rises at 04:26 and sets at 18:58: the day lasts 14h 32m, that is twelve day hours of 1h 13m. The night, until the next sunrise at 04:27, lasts 9h 29m: twelve night hours of 47 min.
Which planet rules the first hour that day?
Venus, from 04:26 to 05:39: 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.