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, 27 May 2026: day of Mercury
- Sunrise
- 07:48
- Sunset
- 17:52
- Next sunrise
- 07:49
A day hour lasts 50 min; a night hour, 1h 10m. Local time (America/Argentina/Buenos_Aires).
Day
- 1☿︎ Mercury07:48 – 08:39
- 2☽︎ Moon08:39 – 09:29
- 3♄︎ Saturn09:29 – 10:19
- 4♃︎ Jupiter10:19 – 11:09
- 5♂︎ Mars11:09 – 12:00
- 6☉︎ Sun12:00 – 12:50
- 7♀︎ Venus12:50 – 13:40
- 8☿︎ Mercury13:40 – 14:31
- 9☽︎ Moon14:31 – 15:21
- 10♄︎ Saturn15:21 – 16:11
- 11♃︎ Jupiter16:11 – 17:02
- 12♂︎ Mars17:02 – 17:52
Night
- 1☉︎ Sun17:52 – 19:02
- 2♀︎ Venus19:02 – 20:11
- 3☿︎ Mercury20:11 – 21:21
- 4☽︎ Moon21:21 – 22:31
- 5♄︎ Saturn22:31 – 23:41
- 6♃︎ Jupiter23:41 – 00:50
- 7♂︎ Mars00:50 – 02:00
- 8☉︎ Sun02:00 – 03:10
- 9♀︎ Venus03:10 – 04:20
- 10☿︎ Mercury04:20 – 05:29
- 11☽︎ Moon05:29 – 06:39
- 12♄︎ Saturn06:39 – 07:49
Other cities · Argentina
Questions
How are the planetary hours calculated in Buenos Aires?
On Wednesday, 27 May 2026, the Sun rises at 07:48 and sets at 17:52: the day lasts 10h 04m, that is twelve day hours of 50 min. The night, until the next sunrise at 07:49, lasts 13h 57m: twelve night hours of 1h 10m.
Which planet rules the first hour that day?
Mercury, from 07:48 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.