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 Wednesday, 7 October 2026: day of Mercury
- Sunrise
- 07:42
- Sunset
- 19:06
- Next sunrise
- 07:43
A day hour lasts 57 min; a night hour, 1h 03m. Local time (Europe/Paris).
Day
- 1☿︎ Mercury07:42 – 08:39
- 2☽︎ Moon08:39 – 09:36
- 3♄︎ Saturn09:36 – 10:33
- 4♃︎ Jupiter10:33 – 11:30
- 5♂︎ Mars11:30 – 12:27
- 6☉︎ Sun12:27 – 13:24
- 7♀︎ Venus13:24 – 14:21
- 8☿︎ Mercury14:21 – 15:18
- 9☽︎ Moon15:18 – 16:15
- 10♄︎ Saturn16:15 – 17:12
- 11♃︎ Jupiter17:12 – 18:09
- 12♂︎ Mars18:09 – 19:06
Night
- 1☉︎ Sun19:06 – 20:09
- 2♀︎ Venus20:09 – 21:12
- 3☿︎ Mercury21:12 – 22:15
- 4☽︎ Moon22:15 – 23:19
- 5♄︎ Saturn23:19 – 00:22
- 6♃︎ Jupiter00:22 – 01:25
- 7♂︎ Mars01:25 – 02:28
- 8☉︎ Sun02:28 – 03:31
- 9♀︎ Venus03:31 – 04:34
- 10☿︎ Mercury04:34 – 05:37
- 11☽︎ Moon05:37 – 06:40
- 12♄︎ Saturn06:40 – 07:43
Other cities · France
Questions
How are the planetary hours calculated in Grenoble?
On Wednesday, 7 October 2026, the Sun rises at 07:42 and sets at 19:06: the day lasts 11h 24m, that is twelve day hours of 57 min. The night, until the next sunrise at 07:43, lasts 12h 37m: twelve night hours of 1h 03m.
Which planet rules the first hour that day?
Mercury, from 07:42 to 08:39: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Moon, Saturn, Jupiter, Mars, the Sun, Venus, then Mercury 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.