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, 30 December 2026: day of Mercury
- Sunrise
- 05:42
- Sunset
- 20:09
- Next sunrise
- 05:43
A day hour lasts 1h 12m; a night hour, 48 min. Local time (America/Argentina/Buenos_Aires).
Day
- 1☿︎ Mercury05:42 – 06:54
- 2☽︎ Moon06:54 – 08:07
- 3♄︎ Saturn08:07 – 09:19
- 4♃︎ Jupiter09:19 – 10:31
- 5♂︎ Mars10:31 – 11:43
- 6☉︎ Sun11:43 – 12:56
- 7♀︎ Venus12:56 – 14:08
- 8☿︎ Mercury14:08 – 15:20
- 9☽︎ Moon15:20 – 16:32
- 10♄︎ Saturn16:32 – 17:44
- 11♃︎ Jupiter17:44 – 18:57
- 12♂︎ Mars18:57 – 20:09
Night
- 1☉︎ Sun20:09 – 20:57
- 2♀︎ Venus20:57 – 21:45
- 3☿︎ Mercury21:45 – 22:32
- 4☽︎ Moon22:32 – 23:20
- 5♄︎ Saturn23:20 – 00:08
- 6♃︎ Jupiter00:08 – 00:56
- 7♂︎ Mars00:56 – 01:44
- 8☉︎ Sun01:44 – 02:32
- 9♀︎ Venus02:32 – 03:19
- 10☿︎ Mercury03:19 – 04:07
- 11☽︎ Moon04:07 – 04:55
- 12♄︎ Saturn04:55 – 05:43
Other cities · Argentina
Questions
How are the planetary hours calculated in Buenos Aires?
On Wednesday, 30 December 2026, the Sun rises at 05:42 and sets at 20:09: the day lasts 14h 27m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 05:43, lasts 9h 34m: twelve night hours of 48 min.
Which planet rules the first hour that day?
Mercury, from 05:42 to 06:54: 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.