Planetary hours
in Grenoble.
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 Thursday, 31 December 2026: day of Jupiter
- Sunrise
- 08:15
- Sunset
- 17:04
- Next sunrise
- 08:16
A day hour lasts 44 min; a night hour, 1h 16m. Local time (Europe/Paris).
Day
- 1♃︎ Jupiter08:15 – 09:00
- 2♂︎ Mars09:00 – 09:44
- 3☉︎ Sun09:44 – 10:28
- 4♀︎ Venus10:28 – 11:12
- 5☿︎ Mercury11:12 – 11:56
- 6☽︎ Moon11:56 – 12:40
- 7♄︎ Saturn12:40 – 13:24
- 8♃︎ Jupiter13:24 – 14:08
- 9♂︎ Mars14:08 – 14:52
- 10☉︎ Sun14:52 – 15:36
- 11♀︎ Venus15:36 – 16:20
- 12☿︎ Mercury16:20 – 17:04
Night
- 1☽︎ Moon17:04 – 18:20
- 2♄︎ Saturn18:20 – 19:36
- 3♃︎ Jupiter19:36 – 20:52
- 4♂︎ Mars20:52 – 22:08
- 5☉︎ Sun22:08 – 23:24
- 6♀︎ Venus23:24 – 00:40
- 7☿︎ Mercury00:40 – 01:56
- 8☽︎ Moon01:56 – 03:12
- 9♄︎ Saturn03:12 – 04:28
- 10♃︎ Jupiter04:28 – 05:44
- 11♂︎ Mars05:44 – 07:00
- 12☉︎ Sun07:00 – 08:16
Other cities · France
Questions
How are the planetary hours calculated in Grenoble?
On Thursday, 31 December 2026, the Sun rises at 08:15 and sets at 17:04: the day lasts 8h 48m, that is twelve day hours of 44 min. The night, until the next sunrise at 08:16, lasts 15h 12m: twelve night hours of 1h 16m.
Which planet rules the first hour that day?
Jupiter, from 08:15 to 09:00: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mars, the Sun, Venus, Mercury, the Moon, Saturn, then Jupiter 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.