Planetary hours
in Buenos Aires.
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 September 2026: day of Mercury
- Sunrise
- 06:51
- Sunset
- 18:45
- Next sunrise
- 06:49
A day hour lasts 1h 00m; a night hour, 1h 00m. Local time (America/Argentina/Buenos_Aires).
Day
- 1☿︎ Mercury06:51 – 07:50
- 2☽︎ Moon07:50 – 08:50
- 3♄︎ Saturn08:50 – 09:49
- 4♃︎ Jupiter09:49 – 10:49
- 5♂︎ Mars10:49 – 11:49
- 6☉︎ Sun11:49 – 12:48
- 7♀︎ Venus12:48 – 13:48
- 8☿︎ Mercury13:48 – 14:47
- 9☽︎ Moon14:47 – 15:47
- 10♄︎ Saturn15:47 – 16:46
- 11♃︎ Jupiter16:46 – 17:46
- 12♂︎ Mars17:46 – 18:45
Night
- 1☉︎ Sun18:45 – 19:46
- 2♀︎ Venus19:46 – 20:46
- 3☿︎ Mercury20:46 – 21:46
- 4☽︎ Moon21:46 – 22:47
- 5♄︎ Saturn22:47 – 23:47
- 6♃︎ Jupiter23:47 – 00:47
- 7♂︎ Mars00:47 – 01:48
- 8☉︎ Sun01:48 – 02:48
- 9♀︎ Venus02:48 – 03:48
- 10☿︎ Mercury03:48 – 04:49
- 11☽︎ Moon04:49 – 05:49
- 12♄︎ Saturn05:49 – 06:49
Other cities · Argentina
Questions
How are the planetary hours calculated in Buenos Aires?
On Wednesday, 16 September 2026, the Sun rises at 06:51 and sets at 18:45: the day lasts 11h 54m, that is twelve day hours of 1h 00m. The night, until the next sunrise at 06:49, lasts 12h 04m: twelve night hours of 1h 00m.
Which planet rules the first hour that day?
Mercury, from 06:51 to 07:50: 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.