Planetary hours
in Mar del Plata.
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, 4 December 2026: day of Venus
- Sunrise
- 05:20
- Sunset
- 20:00
- Next sunrise
- 05:20
A day hour lasts 1h 13m; a night hour, 47 min. Local time (America/Argentina/Buenos_Aires).
Day
- 1♀︎ Venus05:20 – 06:34
- 2☿︎ Mercury06:34 – 07:47
- 3☽︎ Moon07:47 – 09:00
- 4♄︎ Saturn09:00 – 10:14
- 5♃︎ Jupiter10:14 – 11:27
- 6♂︎ Mars11:27 – 12:40
- 7☉︎ Sun12:40 – 13:53
- 8♀︎ Venus13:53 – 15:07
- 9☿︎ Mercury15:07 – 16:20
- 10☽︎ Moon16:20 – 17:33
- 11♄︎ Saturn17:33 – 18:47
- 12♃︎ Jupiter18:47 – 20:00
Night
- 1♂︎ Mars20:00 – 20:47
- 2☉︎ Sun20:47 – 21:33
- 3♀︎ Venus21:33 – 22:20
- 4☿︎ Mercury22:20 – 23:07
- 5☽︎ Moon23:07 – 23:53
- 6♄︎ Saturn23:53 – 00:40
- 7♃︎ Jupiter00:40 – 01:27
- 8♂︎ Mars01:27 – 02:14
- 9☉︎ Sun02:14 – 03:00
- 10♀︎ Venus03:00 – 03:47
- 11☿︎ Mercury03:47 – 04:34
- 12☽︎ Moon04:34 – 05:20
Other cities · Argentina
Questions
How are the planetary hours calculated in Mar del Plata?
On Friday, 4 December 2026, the Sun rises at 05:20 and sets at 20:00: the day lasts 14h 39m, that is twelve day hours of 1h 13m. The night, until the next sunrise at 05:20, lasts 9h 21m: twelve night hours of 47 min.
Which planet rules the first hour that day?
Venus, from 05:20 to 06:34: 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.