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 Tuesday, 4 August 2026: day of Mars
- Sunrise
- 06:25
- Sunset
- 21:00
- Next sunrise
- 06:26
A day hour lasts 1h 13m; a night hour, 47 min. Local time (Europe/Paris).
Day
- 1♂︎ Mars06:25 – 07:38
- 2☉︎ Sun07:38 – 08:51
- 3♀︎ Venus08:51 – 10:04
- 4☿︎ Mercury10:04 – 11:17
- 5☽︎ Moon11:17 – 12:29
- 6♄︎ Saturn12:29 – 13:42
- 7♃︎ Jupiter13:42 – 14:55
- 8♂︎ Mars14:55 – 16:08
- 9☉︎ Sun16:08 – 17:21
- 10♀︎ Venus17:21 – 18:34
- 11☿︎ Mercury18:34 – 19:47
- 12☽︎ Moon19:47 – 21:00
Night
- 1♄︎ Saturn21:00 – 21:47
- 2♃︎ Jupiter21:47 – 22:34
- 3♂︎ Mars22:34 – 23:21
- 4☉︎ Sun23:21 – 00:09
- 5♀︎ Venus00:09 – 00:56
- 6☿︎ Mercury00:56 – 01:43
- 7☽︎ Moon01:43 – 02:30
- 8♄︎ Saturn02:30 – 03:17
- 9♃︎ Jupiter03:17 – 04:04
- 10♂︎ Mars04:04 – 04:52
- 11☉︎ Sun04:52 – 05:39
- 12♀︎ Venus05:39 – 06:26
Other cities · France
Questions
How are the planetary hours calculated in Grenoble?
On Tuesday, 4 August 2026, the Sun rises at 06:25 and sets at 21:00: the day lasts 14h 35m, that is twelve day hours of 1h 13m. The night, until the next sunrise at 06:26, lasts 9h 26m: twelve night hours of 47 min.
Which planet rules the first hour that day?
Mars, from 06:25 to 07:38: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars 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.