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, 5 August 2025: day of Mars
- Sunrise
- 04:42
- Sunset
- 18:42
- Next sunrise
- 04:43
A day hour lasts 1h 10m; a night hour, 50 min. Local time (Asia/Tokyo).
Day
- 1♂︎ Mars04:42 – 05:52
- 2☉︎ Sun05:52 – 07:02
- 3♀︎ Venus07:02 – 08:12
- 4☿︎ Mercury08:12 – 09:22
- 5☽︎ Moon09:22 – 10:32
- 6♄︎ Saturn10:32 – 11:42
- 7♃︎ Jupiter11:42 – 12:52
- 8♂︎ Mars12:52 – 14:02
- 9☉︎ Sun14:02 – 15:12
- 10♀︎ Venus15:12 – 16:22
- 11☿︎ Mercury16:22 – 17:32
- 12☽︎ Moon17:32 – 18:42
Night
- 1♄︎ Saturn18:42 – 19:32
- 2♃︎ Jupiter19:32 – 20:22
- 3♂︎ Mars20:22 – 21:12
- 4☉︎ Sun21:12 – 22:02
- 5♀︎ Venus22:02 – 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 – 04:43
Questions
How are the planetary hours calculated in Sendai?
On Tuesday, 5 August 2025, the Sun rises at 04:42 and sets at 18:42: the day lasts 14h 00m, that is twelve day hours of 1h 10m. The night, until the next sunrise at 04:43, lasts 10h 01m: twelve night hours of 50 min.
Which planet rules the first hour that day?
Mars, from 04:42 to 05:52: 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.