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 Tuesday, 25 August 2026: day of Mars
- Sunrise
- 07:21
- Sunset
- 18:30
- Next sunrise
- 07:20
A day hour lasts 56 min; a night hour, 1h 04m. Local time (America/Argentina/Buenos_Aires).
Day
- 1♂︎ Mars07:21 – 08:17
- 2☉︎ Sun08:17 – 09:12
- 3♀︎ Venus09:12 – 10:08
- 4☿︎ Mercury10:08 – 11:04
- 5☽︎ Moon11:04 – 12:00
- 6♄︎ Saturn12:00 – 12:55
- 7♃︎ Jupiter12:55 – 13:51
- 8♂︎ Mars13:51 – 14:47
- 9☉︎ Sun14:47 – 15:43
- 10♀︎ Venus15:43 – 16:38
- 11☿︎ Mercury16:38 – 17:34
- 12☽︎ Moon17:34 – 18:30
Night
- 1♄︎ Saturn18:30 – 19:34
- 2♃︎ Jupiter19:34 – 20:38
- 3♂︎ Mars20:38 – 21:42
- 4☉︎ Sun21:42 – 22:46
- 5♀︎ Venus22:46 – 23:51
- 6☿︎ Mercury23:51 – 00:55
- 7☽︎ Moon00:55 – 01:59
- 8♄︎ Saturn01:59 – 03:03
- 9♃︎ Jupiter03:03 – 04:07
- 10♂︎ Mars04:07 – 05:11
- 11☉︎ Sun05:11 – 06:15
- 12♀︎ Venus06:15 – 07:20
Other cities · Argentina
Questions
How are the planetary hours calculated in Buenos Aires?
On Tuesday, 25 August 2026, the Sun rises at 07:21 and sets at 18:30: the day lasts 11h 09m, that is twelve day hours of 56 min. The night, until the next sunrise at 07:20, lasts 12h 50m: twelve night hours of 1h 04m.
Which planet rules the first hour that day?
Mars, from 07:21 to 08:17: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars 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.