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, 25 August 2026: day of Mars
- Sunrise
- 04:59
- Sunset
- 18:17
- Next sunrise
- 05:00
A day hour lasts 1h 06m; a night hour, 54 min. Local time (Asia/Tokyo).
Day
- 1♂︎ Mars04:59 – 06:06
- 2☉︎ Sun06:06 – 07:12
- 3♀︎ Venus07:12 – 08:18
- 4☿︎ Mercury08:18 – 09:25
- 5☽︎ Moon09:25 – 10:31
- 6♄︎ Saturn10:31 – 11:38
- 7♃︎ Jupiter11:38 – 12:44
- 8♂︎ Mars12:44 – 13:51
- 9☉︎ Sun13:51 – 14:57
- 10♀︎ Venus14:57 – 16:04
- 11☿︎ Mercury16:04 – 17:10
- 12☽︎ Moon17:10 – 18:17
Night
- 1♄︎ Saturn18:17 – 19:10
- 2♃︎ Jupiter19:10 – 20:04
- 3♂︎ Mars20:04 – 20:58
- 4☉︎ Sun20:58 – 21:51
- 5♀︎ Venus21:51 – 22:45
- 6☿︎ Mercury22:45 – 23:38
- 7☽︎ Moon23:38 – 00:32
- 8♄︎ Saturn00:32 – 01:26
- 9♃︎ Jupiter01:26 – 02:19
- 10♂︎ Mars02:19 – 03:13
- 11☉︎ Sun03:13 – 04:06
- 12♀︎ Venus04:06 – 05:00
Questions
How are the planetary hours calculated in Sendai?
On Tuesday, 25 August 2026, the Sun rises at 04:59 and sets at 18:17: the day lasts 13h 18m, that is twelve day hours of 1h 06m. The night, until the next sunrise at 05:00, lasts 10h 43m: twelve night hours of 54 min.
Which planet rules the first hour that day?
Mars, from 04:59 to 06:06: 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.