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, 5 October 2025: day of the Sun
- Sunrise
- 07:40
- Sunset
- 19:09
- Next sunrise
- 07:41
A day hour lasts 57 min; a night hour, 1h 03m. Local time (Europe/Paris).
Day
- 1☉︎ Sun07:40 – 08:37
- 2♀︎ Venus08:37 – 09:35
- 3☿︎ Mercury09:35 – 10:32
- 4☽︎ Moon10:32 – 11:30
- 5♄︎ Saturn11:30 – 12:27
- 6♃︎ Jupiter12:27 – 13:25
- 7♂︎ Mars13:25 – 14:22
- 8☉︎ Sun14:22 – 15:20
- 9♀︎ Venus15:20 – 16:17
- 10☿︎ Mercury16:17 – 17:14
- 11☽︎ Moon17:14 – 18:12
- 12♄︎ Saturn18:12 – 19:09
Night
- 1♃︎ Jupiter19:09 – 20:12
- 2♂︎ Mars20:12 – 21:15
- 3☉︎ Sun21:15 – 22:17
- 4♀︎ Venus22:17 – 23:20
- 5☿︎ Mercury23:20 – 00:23
- 6☽︎ Moon00:23 – 01:25
- 7♄︎ Saturn01:25 – 02:28
- 8♃︎ Jupiter02:28 – 03:31
- 9♂︎ Mars03:31 – 04:33
- 10☉︎ Sun04:33 – 05:36
- 11♀︎ Venus05:36 – 06:38
- 12☿︎ Mercury06:38 – 07:41
Other cities · France
Questions
How are the planetary hours calculated in Grenoble?
On Sunday, 5 October 2025, the Sun rises at 07:40 and sets at 19:09: the day lasts 11h 30m, that is twelve day hours of 57 min. The night, until the next sunrise at 07:41, lasts 12h 32m: twelve night hours of 1h 03m.
Which planet rules the first hour that day?
The Sun, from 07:40 to 08:37: 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.