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 Sunday, 19 October 2025: day of the Sun
- Sunrise
- 07:58
- Sunset
- 18:45
- Next sunrise
- 07:59
A day hour lasts 54 min; a night hour, 1h 06m. Local time (Europe/Paris).
Day
- 1☉︎ Sun07:58 – 08:52
- 2♀︎ Venus08:52 – 09:46
- 3☿︎ Mercury09:46 – 10:40
- 4☽︎ Moon10:40 – 11:33
- 5♄︎ Saturn11:33 – 12:27
- 6♃︎ Jupiter12:27 – 13:21
- 7♂︎ Mars13:21 – 14:15
- 8☉︎ Sun14:15 – 15:09
- 9♀︎ Venus15:09 – 16:03
- 10☿︎ Mercury16:03 – 16:57
- 11☽︎ Moon16:57 – 17:51
- 12♄︎ Saturn17:51 – 18:45
Night
- 1♃︎ Jupiter18:45 – 19:51
- 2♂︎ Mars19:51 – 20:57
- 3☉︎ Sun20:57 – 22:03
- 4♀︎ Venus22:03 – 23:09
- 5☿︎ Mercury23:09 – 00:16
- 6☽︎ Moon00:16 – 01:22
- 7♄︎ Saturn01:22 – 02:28
- 8♃︎ Jupiter02:28 – 03:34
- 9♂︎ Mars03:34 – 04:41
- 10☉︎ Sun04:41 – 05:47
- 11♀︎ Venus05:47 – 06:53
- 12☿︎ Mercury06:53 – 07:59
Other cities · France
Questions
How are the planetary hours calculated in Grenoble?
On Sunday, 19 October 2025, the Sun rises at 07:58 and sets at 18:45: the day lasts 10h 47m, that is twelve day hours of 54 min. The night, until the next sunrise at 07:59, lasts 13h 15m: twelve night hours of 1h 06m.
Which planet rules the first hour that day?
The Sun, from 07:58 to 08:52: 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.