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, 11 December 2026: day of Venus
- Sunrise
- 05:21
- Sunset
- 20:06
- Next sunrise
- 05:21
A day hour lasts 1h 14m; a night hour, 46 min. Local time (America/Argentina/Buenos_Aires).
Day
- 1♀︎ Venus05:21 – 06:34
- 2☿︎ Mercury06:34 – 07:48
- 3☽︎ Moon07:48 – 09:02
- 4♄︎ Saturn09:02 – 10:16
- 5♃︎ Jupiter10:16 – 11:29
- 6♂︎ Mars11:29 – 12:43
- 7☉︎ Sun12:43 – 13:57
- 8♀︎ Venus13:57 – 15:11
- 9☿︎ Mercury15:11 – 16:24
- 10☽︎ Moon16:24 – 17:38
- 11♄︎ Saturn17:38 – 18:52
- 12♃︎ Jupiter18:52 – 20:06
Night
- 1♂︎ Mars20:06 – 20:52
- 2☉︎ Sun20:52 – 21:38
- 3♀︎ Venus21:38 – 22:24
- 4☿︎ Mercury22:24 – 23:11
- 5☽︎ Moon23:11 – 23:57
- 6♄︎ Saturn23:57 – 00:43
- 7♃︎ Jupiter00:43 – 01:29
- 8♂︎ Mars01:29 – 02:16
- 9☉︎ Sun02:16 – 03:02
- 10♀︎ Venus03:02 – 03:48
- 11☿︎ Mercury03:48 – 04:34
- 12☽︎ Moon04:34 – 05:21
Other cities · Argentina
Questions
How are the planetary hours calculated in Mar del Plata?
On Friday, 11 December 2026, the Sun rises at 05:21 and sets at 20:06: the day lasts 14h 45m, that is twelve day hours of 1h 14m. The night, until the next sunrise at 05:21, lasts 9h 15m: twelve night hours of 46 min.
Which planet rules the first hour that day?
Venus, from 05:21 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.