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, 20 October 2026: day of Mars
- Sunrise
- 07:59
- Sunset
- 18:43
- Next sunrise
- 08:00
A day hour lasts 54 min; a night hour, 1h 06m. Local time (Europe/Paris).
Day
- 1♂︎ Mars07:59 – 08:53
- 2☉︎ Sun08:53 – 09:46
- 3♀︎ Venus09:46 – 10:40
- 4☿︎ Mercury10:40 – 11:34
- 5☽︎ Moon11:34 – 12:27
- 6♄︎ Saturn12:27 – 13:21
- 7♃︎ Jupiter13:21 – 14:15
- 8♂︎ Mars14:15 – 15:08
- 9☉︎ Sun15:08 – 16:02
- 10♀︎ Venus16:02 – 16:56
- 11☿︎ Mercury16:56 – 17:50
- 12☽︎ Moon17:50 – 18:43
Night
- 1♄︎ Saturn18:43 – 19:50
- 2♃︎ Jupiter19:50 – 20:56
- 3♂︎ Mars20:56 – 22:03
- 4☉︎ Sun22:03 – 23:09
- 5♀︎ Venus23:09 – 00:15
- 6☿︎ Mercury00:15 – 01:22
- 7☽︎ Moon01:22 – 02:28
- 8♄︎ Saturn02:28 – 03:35
- 9♃︎ Jupiter03:35 – 04:41
- 10♂︎ Mars04:41 – 05:47
- 11☉︎ Sun05:47 – 06:54
- 12♀︎ Venus06:54 – 08:00
Other cities · France
Questions
How are the planetary hours calculated in Grenoble?
On Tuesday, 20 October 2026, the Sun rises at 07:59 and sets at 18:43: the day lasts 10h 44m, that is twelve day hours of 54 min. The night, until the next sunrise at 08:00, lasts 13h 17m: twelve night hours of 1h 06m.
Which planet rules the first hour that day?
Mars, from 07:59 to 08:53: 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.