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, 2 September 2026: day of Mercury
- Sunrise
- 07:10
- Sunset
- 18:35
- Next sunrise
- 07:09
A day hour lasts 57 min; a night hour, 1h 03m. Local time (America/Argentina/Buenos_Aires).
Day
- 1☿︎ Mercury07:10 – 08:07
- 2☽︎ Moon08:07 – 09:05
- 3♄︎ Saturn09:05 – 10:02
- 4♃︎ Jupiter10:02 – 10:59
- 5♂︎ Mars10:59 – 11:56
- 6☉︎ Sun11:56 – 12:53
- 7♀︎ Venus12:53 – 13:50
- 8☿︎ Mercury13:50 – 14:47
- 9☽︎ Moon14:47 – 15:44
- 10♄︎ Saturn15:44 – 16:41
- 11♃︎ Jupiter16:41 – 17:38
- 12♂︎ Mars17:38 – 18:35
Night
- 1☉︎ Sun18:35 – 19:38
- 2♀︎ Venus19:38 – 20:41
- 3☿︎ Mercury20:41 – 21:44
- 4☽︎ Moon21:44 – 22:47
- 5♄︎ Saturn22:47 – 23:49
- 6♃︎ Jupiter23:49 – 00:52
- 7♂︎ Mars00:52 – 01:55
- 8☉︎ Sun01:55 – 02:58
- 9♀︎ Venus02:58 – 04:01
- 10☿︎ Mercury04:01 – 05:03
- 11☽︎ Moon05:03 – 06:06
- 12♄︎ Saturn06:06 – 07:09
Other cities · Argentina
Questions
How are the planetary hours calculated in Buenos Aires?
On Wednesday, 2 September 2026, the Sun rises at 07:10 and sets at 18:35: the day lasts 11h 25m, that is twelve day hours of 57 min. The night, until the next sunrise at 07:09, lasts 12h 34m: twelve night hours of 1h 03m.
Which planet rules the first hour that day?
Mercury, from 07:10 to 08:07: 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.