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, 13 January 2026: day of Mars
- Sunrise
- 08:13
- Sunset
- 17:18
- Next sunrise
- 08:12
A day hour lasts 45 min; a night hour, 1h 15m. Local time (Europe/Paris).
Day
- 1♂︎ Mars08:13 – 08:58
- 2☉︎ Sun08:58 – 09:44
- 3♀︎ Venus09:44 – 10:29
- 4☿︎ Mercury10:29 – 11:15
- 5☽︎ Moon11:15 – 12:00
- 6♄︎ Saturn12:00 – 12:46
- 7♃︎ Jupiter12:46 – 13:31
- 8♂︎ Mars13:31 – 14:16
- 9☉︎ Sun14:16 – 15:02
- 10♀︎ Venus15:02 – 15:47
- 11☿︎ Mercury15:47 – 16:33
- 12☽︎ Moon16:33 – 17:18
Night
- 1♄︎ Saturn17:18 – 18:33
- 2♃︎ Jupiter18:33 – 19:47
- 3♂︎ Mars19:47 – 21:02
- 4☉︎ Sun21:02 – 22:16
- 5♀︎ Venus22:16 – 23:31
- 6☿︎ Mercury23:31 – 00:45
- 7☽︎ Moon00:45 – 02:00
- 8♄︎ Saturn02:00 – 03:14
- 9♃︎ Jupiter03:14 – 04:29
- 10♂︎ Mars04:29 – 05:43
- 11☉︎ Sun05:43 – 06:58
- 12♀︎ Venus06:58 – 08:12
Other cities · France
Questions
How are the planetary hours calculated in Grenoble?
On Tuesday, 13 January 2026, the Sun rises at 08:13 and sets at 17:18: the day lasts 9h 05m, that is twelve day hours of 45 min. The night, until the next sunrise at 08:12, lasts 14h 54m: twelve night hours of 1h 15m.
Which planet rules the first hour that day?
Mars, from 08:13 to 08:58: 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.