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 Saturday, 17 January 2026: day of Saturn
- Sunrise
- 05:46
- Sunset
- 20:13
- Next sunrise
- 05:47
A day hour lasts 1h 12m; a night hour, 48 min. Local time (America/Argentina/Buenos_Aires).
Day
- 1♄︎ Saturn05:46 – 06:59
- 2♃︎ Jupiter06:59 – 08:11
- 3♂︎ Mars08:11 – 09:23
- 4☉︎ Sun09:23 – 10:35
- 5♀︎ Venus10:35 – 11:47
- 6☿︎ Mercury11:47 – 13:00
- 7☽︎ Moon13:00 – 14:12
- 8♄︎ Saturn14:12 – 15:24
- 9♃︎ Jupiter15:24 – 16:36
- 10♂︎ Mars16:36 – 17:49
- 11☉︎ Sun17:49 – 19:01
- 12♀︎ Venus19:01 – 20:13
Night
- 1☿︎ Mercury20:13 – 21:01
- 2☽︎ Moon21:01 – 21:49
- 3♄︎ Saturn21:49 – 22:37
- 4♃︎ Jupiter22:37 – 23:24
- 5♂︎ Mars23:24 – 00:12
- 6☉︎ Sun00:12 – 01:00
- 7♀︎ Venus01:00 – 01:48
- 8☿︎ Mercury01:48 – 02:36
- 9☽︎ Moon02:36 – 03:24
- 10♄︎ Saturn03:24 – 04:12
- 11♃︎ Jupiter04:12 – 05:00
- 12♂︎ Mars05:00 – 05:47
Other cities · Argentina
Questions
How are the planetary hours calculated in Mar del Plata?
On Saturday, 17 January 2026, the Sun rises at 05:46 and sets at 20:13: the day lasts 14h 27m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 05:47, lasts 9h 34m: twelve night hours of 48 min.
Which planet rules the first hour that day?
Saturn, from 05:46 to 06:59: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn 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.