Planetary hours
in Saint-Louis.
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, 16 December 2026: day of Mercury
- Sunrise
- 07:26
- Sunset
- 18:37
- Next sunrise
- 07:26
A day hour lasts 56 min; a night hour, 1h 04m. Local time (Africa/Dakar).
Day
- 1☿︎ Mercury07:26 – 08:22
- 2☽︎ Moon08:22 – 09:17
- 3♄︎ Saturn09:17 – 10:13
- 4♃︎ Jupiter10:13 – 11:09
- 5♂︎ Mars11:09 – 12:05
- 6☉︎ Sun12:05 – 13:01
- 7♀︎ Venus13:01 – 13:57
- 8☿︎ Mercury13:57 – 14:53
- 9☽︎ Moon14:53 – 15:49
- 10♄︎ Saturn15:49 – 16:45
- 11♃︎ Jupiter16:45 – 17:41
- 12♂︎ Mars17:41 – 18:37
Night
- 1☉︎ Sun18:37 – 19:41
- 2♀︎ Venus19:41 – 20:45
- 3☿︎ Mercury20:45 – 21:49
- 4☽︎ Moon21:49 – 22:53
- 5♄︎ Saturn22:53 – 23:57
- 6♃︎ Jupiter23:57 – 01:01
- 7♂︎ Mars01:01 – 02:05
- 8☉︎ Sun02:05 – 03:10
- 9♀︎ Venus03:10 – 04:14
- 10☿︎ Mercury04:14 – 05:18
- 11☽︎ Moon05:18 – 06:22
- 12♄︎ Saturn06:22 – 07:26
Other cities · Senegal
Questions
How are the planetary hours calculated in Saint-Louis?
On Wednesday, 16 December 2026, the Sun rises at 07:26 and sets at 18:37: the day lasts 11h 11m, that is twelve day hours of 56 min. The night, until the next sunrise at 07:26, lasts 12h 50m: twelve night hours of 1h 04m.
Which planet rules the first hour that day?
Mercury, from 07:26 to 08:22: 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.