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 Wednesday, 12 August 2026: day of Mercury
- Sunrise
- 07:38
- Sunset
- 18:12
- Next sunrise
- 07:37
A day hour lasts 53 min; a night hour, 1h 07m. Local time (America/Argentina/Buenos_Aires).
Day
- 1☿︎ Mercury07:38 – 08:31
- 2☽︎ Moon08:31 – 09:24
- 3♄︎ Saturn09:24 – 10:17
- 4♃︎ Jupiter10:17 – 11:09
- 5♂︎ Mars11:09 – 12:02
- 6☉︎ Sun12:02 – 12:55
- 7♀︎ Venus12:55 – 13:48
- 8☿︎ Mercury13:48 – 14:41
- 9☽︎ Moon14:41 – 15:33
- 10♄︎ Saturn15:33 – 16:26
- 11♃︎ Jupiter16:26 – 17:19
- 12♂︎ Mars17:19 – 18:12
Night
- 1☉︎ Sun18:12 – 19:19
- 2♀︎ Venus19:19 – 20:26
- 3☿︎ Mercury20:26 – 21:33
- 4☽︎ Moon21:33 – 22:40
- 5♄︎ Saturn22:40 – 23:47
- 6♃︎ Jupiter23:47 – 00:54
- 7♂︎ Mars00:54 – 02:02
- 8☉︎ Sun02:02 – 03:09
- 9♀︎ Venus03:09 – 04:16
- 10☿︎ Mercury04:16 – 05:23
- 11☽︎ Moon05:23 – 06:30
- 12♄︎ Saturn06:30 – 07:37
Other cities · Argentina
Questions
How are the planetary hours calculated in Mar del Plata?
On Wednesday, 12 August 2026, the Sun rises at 07:38 and sets at 18:12: the day lasts 10h 33m, that is twelve day hours of 53 min. The night, until the next sunrise at 07:37, lasts 13h 25m: twelve night hours of 1h 07m.
Which planet rules the first hour that day?
Mercury, from 07:38 to 08:31: 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.