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 Friday, 11 December 2026: day of Venus
- Sunrise
- 05:33
- Sunset
- 19:59
- Next sunrise
- 05:34
A day hour lasts 1h 12m; a night hour, 48 min. Local time (America/Argentina/Buenos_Aires).
Day
- 1♀︎ Venus05:33 – 06:46
- 2☿︎ Mercury06:46 – 07:58
- 3☽︎ Moon07:58 – 09:10
- 4♄︎ Saturn09:10 – 10:22
- 5♃︎ Jupiter10:22 – 11:34
- 6♂︎ Mars11:34 – 12:46
- 7☉︎ Sun12:46 – 13:59
- 8♀︎ Venus13:59 – 15:11
- 9☿︎ Mercury15:11 – 16:23
- 10☽︎ Moon16:23 – 17:35
- 11♄︎ Saturn17:35 – 18:47
- 12♃︎ Jupiter18:47 – 19:59
Night
- 1♂︎ Mars19:59 – 20:47
- 2☉︎ Sun20:47 – 21:35
- 3♀︎ Venus21:35 – 22:23
- 4☿︎ Mercury22:23 – 23:11
- 5☽︎ Moon23:11 – 23:59
- 6♄︎ Saturn23:59 – 00:47
- 7♃︎ Jupiter00:47 – 01:34
- 8♂︎ Mars01:34 – 02:22
- 9☉︎ Sun02:22 – 03:10
- 10♀︎ Venus03:10 – 03:58
- 11☿︎ Mercury03:58 – 04:46
- 12☽︎ Moon04:46 – 05:34
Other cities · Argentina
Questions
How are the planetary hours calculated in Buenos Aires?
On Friday, 11 December 2026, the Sun rises at 05:33 and sets at 19:59: the day lasts 14h 26m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 05:34, lasts 9h 34m: twelve night hours of 48 min.
Which planet rules the first hour that day?
Venus, from 05:33 to 06:46: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mercury, the Moon, Saturn, Jupiter, Mars, the Sun, then Venus 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.