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 April 2026: day of Venus
- Sunrise
- 04:58
- Sunset
- 18:14
- Next sunrise
- 04:57
A day hour lasts 1h 06m; a night hour, 54 min. Local time (Asia/Tokyo).
Day
- 1♀︎ Venus04:58 – 06:05
- 2☿︎ Mercury06:05 – 07:11
- 3☽︎ Moon07:11 – 08:17
- 4♄︎ Saturn08:17 – 09:23
- 5♃︎ Jupiter09:23 – 10:30
- 6♂︎ Mars10:30 – 11:36
- 7☉︎ Sun11:36 – 12:42
- 8♀︎ Venus12:42 – 13:49
- 9☿︎ Mercury13:49 – 14:55
- 10☽︎ Moon14:55 – 16:01
- 11♄︎ Saturn16:01 – 17:07
- 12♃︎ Jupiter17:07 – 18:14
Night
- 1♂︎ Mars18:14 – 19:07
- 2☉︎ Sun19:07 – 20:01
- 3♀︎ Venus20:01 – 20:55
- 4☿︎ Mercury20:55 – 21:48
- 5☽︎ Moon21:48 – 22:42
- 6♄︎ Saturn22:42 – 23:35
- 7♃︎ Jupiter23:35 – 00:29
- 8♂︎ Mars00:29 – 01:22
- 9☉︎ Sun01:22 – 02:16
- 10♀︎ Venus02:16 – 03:10
- 11☿︎ Mercury03:10 – 04:03
- 12☽︎ Moon04:03 – 04:57
Questions
How are the planetary hours calculated in Sendai?
On Friday, 17 April 2026, the Sun rises at 04:58 and sets at 18:14: the day lasts 13h 15m, that is twelve day hours of 1h 06m. The night, until the next sunrise at 04:57, lasts 10h 43m: twelve night hours of 54 min.
Which planet rules the first hour that day?
Venus, from 04:58 to 06:05: 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.