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 Friday, 28 August 2026: day of Venus
- Sunrise
- 05:02
- Sunset
- 18:12
- Next sunrise
- 05:03
A day hour lasts 1h 06m; a night hour, 54 min. Local time (Asia/Tokyo).
Day
- 1♀︎ Venus05:02 – 06:08
- 2☿︎ Mercury06:08 – 07:13
- 3☽︎ Moon07:13 – 08:19
- 4♄︎ Saturn08:19 – 09:25
- 5♃︎ Jupiter09:25 – 10:31
- 6♂︎ Mars10:31 – 11:37
- 7☉︎ Sun11:37 – 12:43
- 8♀︎ Venus12:43 – 13:49
- 9☿︎ Mercury13:49 – 14:55
- 10☽︎ Moon14:55 – 16:01
- 11♄︎ Saturn16:01 – 17:07
- 12♃︎ Jupiter17:07 – 18:12
Night
- 1♂︎ Mars18:12 – 19:07
- 2☉︎ Sun19:07 – 20:01
- 3♀︎ Venus20:01 – 20:55
- 4☿︎ Mercury20:55 – 21:49
- 5☽︎ Moon21:49 – 22:43
- 6♄︎ Saturn22:43 – 23:37
- 7♃︎ Jupiter23:37 – 00:32
- 8♂︎ Mars00:32 – 01:26
- 9☉︎ Sun01:26 – 02:20
- 10♀︎ Venus02:20 – 03:14
- 11☿︎ Mercury03:14 – 04:08
- 12☽︎ Moon04:08 – 05:03
Questions
How are the planetary hours calculated in Sendai?
On Friday, 28 August 2026, the Sun rises at 05:02 and sets at 18:12: the day lasts 13h 11m, that is twelve day hours of 1h 06m. The night, until the next sunrise at 05:03, lasts 10h 50m: twelve night hours of 54 min.
Which planet rules the first hour that day?
Venus, from 05:02 to 06:08: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mercury, the Moon, Saturn, Jupiter, Mars, the Sun, then Venus 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.