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 Sunday, 27 December 2026: day of the Sun
- Sunrise
- 05:40
- Sunset
- 20:08
- Next sunrise
- 05:41
A day hour lasts 1h 12m; a night hour, 48 min. Local time (America/Argentina/Buenos_Aires).
Day
- 1☉︎ Sun05:40 – 06:52
- 2♀︎ Venus06:52 – 08:05
- 3☿︎ Mercury08:05 – 09:17
- 4☽︎ Moon09:17 – 10:29
- 5♄︎ Saturn10:29 – 11:42
- 6♃︎ Jupiter11:42 – 12:54
- 7♂︎ Mars12:54 – 14:06
- 8☉︎ Sun14:06 – 15:19
- 9♀︎ Venus15:19 – 16:31
- 10☿︎ Mercury16:31 – 17:43
- 11☽︎ Moon17:43 – 18:56
- 12♄︎ Saturn18:56 – 20:08
Night
- 1♃︎ Jupiter20:08 – 20:56
- 2♂︎ Mars20:56 – 21:43
- 3☉︎ Sun21:43 – 22:31
- 4♀︎ Venus22:31 – 23:19
- 5☿︎ Mercury23:19 – 00:07
- 6☽︎ Moon00:07 – 00:54
- 7♄︎ Saturn00:54 – 01:42
- 8♃︎ Jupiter01:42 – 02:30
- 9♂︎ Mars02:30 – 03:18
- 10☉︎ Sun03:18 – 04:05
- 11♀︎ Venus04:05 – 04:53
- 12☿︎ Mercury04:53 – 05:41
Other cities · Argentina
Questions
How are the planetary hours calculated in Buenos Aires?
On Sunday, 27 December 2026, the Sun rises at 05:40 and sets at 20:08: the day lasts 14h 28m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 05:41, lasts 9h 33m: twelve night hours of 48 min.
Which planet rules the first hour that day?
The Sun, from 05:40 to 06:52: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Venus, Mercury, the Moon, Saturn, Jupiter, Mars, then the Sun 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.