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, 29 December 2026: day of Mars
- Sunrise
- 08:15
- Sunset
- 17:02
- Next sunrise
- 08:15
A day hour lasts 44 min; a night hour, 1h 16m. Local time (Europe/Paris).
Day
- 1♂︎ Mars08:15 – 08:59
- 2☉︎ Sun08:59 – 09:43
- 3♀︎ Venus09:43 – 10:27
- 4☿︎ Mercury10:27 – 11:11
- 5☽︎ Moon11:11 – 11:55
- 6♄︎ Saturn11:55 – 12:39
- 7♃︎ Jupiter12:39 – 13:23
- 8♂︎ Mars13:23 – 14:07
- 9☉︎ Sun14:07 – 14:50
- 10♀︎ Venus14:50 – 15:34
- 11☿︎ Mercury15:34 – 16:18
- 12☽︎ Moon16:18 – 17:02
Night
- 1♄︎ Saturn17:02 – 18:18
- 2♃︎ Jupiter18:18 – 19:34
- 3♂︎ Mars19:34 – 20:51
- 4☉︎ Sun20:51 – 22:07
- 5♀︎ Venus22:07 – 23:23
- 6☿︎ Mercury23:23 – 00:39
- 7☽︎ Moon00:39 – 01:55
- 8♄︎ Saturn01:55 – 03:11
- 9♃︎ Jupiter03:11 – 04:27
- 10♂︎ Mars04:27 – 05:43
- 11☉︎ Sun05:43 – 06:59
- 12♀︎ Venus06:59 – 08:15
Other cities · France
Questions
How are the planetary hours calculated in Grenoble?
On Tuesday, 29 December 2026, the Sun rises at 08:15 and sets at 17:02: the day lasts 8h 47m, that is twelve day hours of 44 min. The night, until the next sunrise at 08:15, lasts 15h 13m: twelve night hours of 1h 16m.
Which planet rules the first hour that day?
Mars, from 08:15 to 08:59: 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.