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 Tuesday, 4 August 2026: day of Mars
- Sunrise
- 04:41
- Sunset
- 18:43
- Next sunrise
- 04:41
A day hour lasts 1h 10m; a night hour, 50 min. Local time (Asia/Tokyo).
Day
- 1♂︎ Mars04:41 – 05:51
- 2☉︎ Sun05:51 – 07:01
- 3♀︎ Venus07:01 – 08:11
- 4☿︎ Mercury08:11 – 09:21
- 5☽︎ Moon09:21 – 10:32
- 6♄︎ Saturn10:32 – 11:42
- 7♃︎ Jupiter11:42 – 12:52
- 8♂︎ Mars12:52 – 14:02
- 9☉︎ Sun14:02 – 15:13
- 10♀︎ Venus15:13 – 16:23
- 11☿︎ Mercury16:23 – 17:33
- 12☽︎ Moon17:33 – 18:43
Night
- 1♄︎ Saturn18:43 – 19:33
- 2♃︎ Jupiter19:33 – 20:23
- 3♂︎ Mars20:23 – 21:13
- 4☉︎ Sun21:13 – 22:03
- 5♀︎ Venus22:03 – 22:52
- 6☿︎ Mercury22:52 – 23:42
- 7☽︎ Moon23:42 – 00:32
- 8♄︎ Saturn00:32 – 01:22
- 9♃︎ Jupiter01:22 – 02:12
- 10♂︎ Mars02:12 – 03:02
- 11☉︎ Sun03:02 – 03:52
- 12♀︎ Venus03:52 – 04:41
Questions
How are the planetary hours calculated in Sendai?
On Tuesday, 4 August 2026, the Sun rises at 04:41 and sets at 18:43: the day lasts 14h 03m, that is twelve day hours of 1h 10m. The night, until the next sunrise at 04:41, lasts 9h 58m: twelve night hours of 50 min.
Which planet rules the first hour that day?
Mars, from 04:41 to 05:51: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars 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.