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 Sunday, 27 July 2025: day of the Sun
- Sunrise
- 04:34
- Sunset
- 18:51
- Next sunrise
- 04:35
A day hour lasts 1h 11m; a night hour, 49 min. Local time (Asia/Tokyo).
Day
- 1☉︎ Sun04:34 – 05:45
- 2♀︎ Venus05:45 – 06:57
- 3☿︎ Mercury06:57 – 08:08
- 4☽︎ Moon08:08 – 09:20
- 5♄︎ Saturn09:20 – 10:31
- 6♃︎ Jupiter10:31 – 11:42
- 7♂︎ Mars11:42 – 12:54
- 8☉︎ Sun12:54 – 14:05
- 9♀︎ Venus14:05 – 15:16
- 10☿︎ Mercury15:16 – 16:28
- 11☽︎ Moon16:28 – 17:39
- 12♄︎ Saturn17:39 – 18:51
Night
- 1♃︎ Jupiter18:51 – 19:39
- 2♂︎ Mars19:39 – 20:28
- 3☉︎ Sun20:28 – 21:17
- 4♀︎ Venus21:17 – 22:05
- 5☿︎ Mercury22:05 – 22:54
- 6☽︎ Moon22:54 – 23:43
- 7♄︎ Saturn23:43 – 00:31
- 8♃︎ Jupiter00:31 – 01:20
- 9♂︎ Mars01:20 – 02:09
- 10☉︎ Sun02:09 – 02:57
- 11♀︎ Venus02:57 – 03:46
- 12☿︎ Mercury03:46 – 04:35
Questions
How are the planetary hours calculated in Sendai?
On Sunday, 27 July 2025, the Sun rises at 04:34 and sets at 18:51: the day lasts 14h 17m, that is twelve day hours of 1h 11m. The night, until the next sunrise at 04:35, lasts 9h 44m: twelve night hours of 49 min.
Which planet rules the first hour that day?
The Sun, from 04:34 to 05:45: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Venus, Mercury, the Moon, Saturn, Jupiter, Mars, then the Sun 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.