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, 16 October 2026: day of Venus
- Sunrise
- 05:45
- Sunset
- 16:57
- Next sunrise
- 05:46
A day hour lasts 56 min; a night hour, 1h 04m. Local time (Asia/Tokyo).
Day
- 1♀︎ Venus05:45 – 06:41
- 2☿︎ Mercury06:41 – 07:37
- 3☽︎ Moon07:37 – 08:33
- 4♄︎ Saturn08:33 – 09:29
- 5♃︎ Jupiter09:29 – 10:25
- 6♂︎ Mars10:25 – 11:21
- 7☉︎ Sun11:21 – 12:17
- 8♀︎ Venus12:17 – 13:13
- 9☿︎ Mercury13:13 – 14:09
- 10☽︎ Moon14:09 – 15:05
- 11♄︎ Saturn15:05 – 16:01
- 12♃︎ Jupiter16:01 – 16:57
Night
- 1♂︎ Mars16:57 – 18:02
- 2☉︎ Sun18:02 – 19:06
- 3♀︎ Venus19:06 – 20:10
- 4☿︎ Mercury20:10 – 21:14
- 5☽︎ Moon21:14 – 22:18
- 6♄︎ Saturn22:18 – 23:22
- 7♃︎ Jupiter23:22 – 00:26
- 8♂︎ Mars00:26 – 01:30
- 9☉︎ Sun01:30 – 02:34
- 10♀︎ Venus02:34 – 03:38
- 11☿︎ Mercury03:38 – 04:42
- 12☽︎ Moon04:42 – 05:46
Questions
How are the planetary hours calculated in Sendai?
On Friday, 16 October 2026, the Sun rises at 05:45 and sets at 16:57: the day lasts 11h 12m, that is twelve day hours of 56 min. The night, until the next sunrise at 05:46, lasts 12h 49m: twelve night hours of 1h 04m.
Which planet rules the first hour that day?
Venus, from 05:45 to 06:41: 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.