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, 4 December 2026: day of Venus
- Sunrise
- 05:33
- Sunset
- 19:54
- Next sunrise
- 05:33
A day hour lasts 1h 12m; a night hour, 48 min. Local time (America/Argentina/Buenos_Aires).
Day
- 1♀︎ Venus05:33 – 06:45
- 2☿︎ Mercury06:45 – 07:56
- 3☽︎ Moon07:56 – 09:08
- 4♄︎ Saturn09:08 – 10:20
- 5♃︎ Jupiter10:20 – 11:32
- 6♂︎ Mars11:32 – 12:43
- 7☉︎ Sun12:43 – 13:55
- 8♀︎ Venus13:55 – 15:07
- 9☿︎ Mercury15:07 – 16:19
- 10☽︎ Moon16:19 – 17:30
- 11♄︎ Saturn17:30 – 18:42
- 12♃︎ Jupiter18:42 – 19:54
Night
- 1♂︎ Mars19:54 – 20:42
- 2☉︎ Sun20:42 – 21:30
- 3♀︎ Venus21:30 – 22:19
- 4☿︎ Mercury22:19 – 23:07
- 5☽︎ Moon23:07 – 23:55
- 6♄︎ Saturn23:55 – 00:43
- 7♃︎ Jupiter00:43 – 01:32
- 8♂︎ Mars01:32 – 02:20
- 9☉︎ Sun02:20 – 03:08
- 10♀︎ Venus03:08 – 03:56
- 11☿︎ Mercury03:56 – 04:45
- 12☽︎ Moon04:45 – 05:33
Other cities · Argentina
Questions
How are the planetary hours calculated in Buenos Aires?
On Friday, 4 December 2026, the Sun rises at 05:33 and sets at 19:54: the day lasts 14h 21m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 05:33, lasts 9h 39m: twelve night hours of 48 min.
Which planet rules the first hour that day?
Venus, from 05:33 to 06:45: 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.