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, 28 July 2026: day of Mars
- Sunrise
- 04:35
- Sunset
- 18:50
- Next sunrise
- 04:35
A day hour lasts 1h 11m; a night hour, 49 min. Local time (Asia/Tokyo).
Day
- 1♂︎ Mars04:35 – 05:46
- 2☉︎ Sun05:46 – 06:57
- 3♀︎ Venus06:57 – 08:08
- 4☿︎ Mercury08:08 – 09:20
- 5☽︎ Moon09:20 – 10:31
- 6♄︎ Saturn10:31 – 11:42
- 7♃︎ Jupiter11:42 – 12:54
- 8♂︎ Mars12:54 – 14:05
- 9☉︎ Sun14:05 – 15:16
- 10♀︎ Venus15:16 – 16:27
- 11☿︎ Mercury16:27 – 17:39
- 12☽︎ Moon17:39 – 18:50
Night
- 1♄︎ Saturn18:50 – 19:39
- 2♃︎ Jupiter19:39 – 20:28
- 3♂︎ Mars20:28 – 21:16
- 4☉︎ Sun21:16 – 22:05
- 5♀︎ Venus22:05 – 22:54
- 6☿︎ Mercury22:54 – 23:43
- 7☽︎ Moon23:43 – 00:32
- 8♄︎ Saturn00:32 – 01:20
- 9♃︎ Jupiter01:20 – 02:09
- 10♂︎ Mars02:09 – 02:58
- 11☉︎ Sun02:58 – 03:47
- 12♀︎ Venus03:47 – 04:35
Questions
How are the planetary hours calculated in Sendai?
On Tuesday, 28 July 2026, the Sun rises at 04:35 and sets at 18:50: the day lasts 14h 15m, that is twelve day hours of 1h 11m. The night, until the next sunrise at 04:35, lasts 9h 45m: twelve night hours of 49 min.
Which planet rules the first hour that day?
Mars, from 04:35 to 05:46: 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.