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, 17 September 2026: day of Jupiter
- Sunrise
- 07:17
- Sunset
- 19:44
- Next sunrise
- 07:19
A day hour lasts 1h 02m; a night hour, 58 min. Local time (Europe/Paris).
Day
- 1♃︎ Jupiter07:17 – 08:20
- 2♂︎ Mars08:20 – 09:22
- 3☉︎ Sun09:22 – 10:24
- 4♀︎ Venus10:24 – 11:26
- 5☿︎ Mercury11:26 – 12:29
- 6☽︎ Moon12:29 – 13:31
- 7♄︎ Saturn13:31 – 14:33
- 8♃︎ Jupiter14:33 – 15:35
- 9♂︎ Mars15:35 – 16:37
- 10☉︎ Sun16:37 – 17:40
- 11♀︎ Venus17:40 – 18:42
- 12☿︎ Mercury18:42 – 19:44
Night
- 1☽︎ Moon19:44 – 20:42
- 2♄︎ Saturn20:42 – 21:40
- 3♃︎ Jupiter21:40 – 22:38
- 4♂︎ Mars22:38 – 23:36
- 5☉︎ Sun23:36 – 00:33
- 6♀︎ Venus00:33 – 01:31
- 7☿︎ Mercury01:31 – 02:29
- 8☽︎ Moon02:29 – 03:27
- 9♄︎ Saturn03:27 – 04:25
- 10♃︎ Jupiter04:25 – 05:23
- 11♂︎ Mars05:23 – 06:21
- 12☉︎ Sun06:21 – 07:19
Other cities · France
Questions
How are the planetary hours calculated in Grenoble?
On Thursday, 17 September 2026, the Sun rises at 07:17 and sets at 19:44: the day lasts 12h 27m, that is twelve day hours of 1h 02m. The night, until the next sunrise at 07:19, lasts 11h 35m: twelve night hours of 58 min.
Which planet rules the first hour that day?
Jupiter, from 07:17 to 08:20: 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.