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, 21 August 2026: day of Venus
- Sunrise
- 07:26
- Sunset
- 18:27
- Next sunrise
- 07:25
A day hour lasts 55 min; a night hour, 1h 05m. Local time (America/Argentina/Buenos_Aires).
Day
- 1♀︎ Venus07:26 – 08:21
- 2☿︎ Mercury08:21 – 09:16
- 3☽︎ Moon09:16 – 10:11
- 4♄︎ Saturn10:11 – 11:06
- 5♃︎ Jupiter11:06 – 12:01
- 6♂︎ Mars12:01 – 12:56
- 7☉︎ Sun12:56 – 13:51
- 8♀︎ Venus13:51 – 14:47
- 9☿︎ Mercury14:47 – 15:42
- 10☽︎ Moon15:42 – 16:37
- 11♄︎ Saturn16:37 – 17:32
- 12♃︎ Jupiter17:32 – 18:27
Night
- 1♂︎ Mars18:27 – 19:32
- 2☉︎ Sun19:32 – 20:36
- 3♀︎ Venus20:36 – 21:41
- 4☿︎ Mercury21:41 – 22:46
- 5☽︎ Moon22:46 – 23:51
- 6♄︎ Saturn23:51 – 00:56
- 7♃︎ Jupiter00:56 – 02:01
- 8♂︎ Mars02:01 – 03:05
- 9☉︎ Sun03:05 – 04:10
- 10♀︎ Venus04:10 – 05:15
- 11☿︎ Mercury05:15 – 06:20
- 12☽︎ Moon06:20 – 07:25
Other cities · Argentina
Questions
How are the planetary hours calculated in Buenos Aires?
On Friday, 21 August 2026, the Sun rises at 07:26 and sets at 18:27: the day lasts 11h 01m, that is twelve day hours of 55 min. The night, until the next sunrise at 07:25, lasts 12h 58m: twelve night hours of 1h 05m.
Which planet rules the first hour that day?
Venus, from 07:26 to 08:21: 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.