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 Sunday, 20 December 2026: day of the Sun
- Sunrise
- 05:23
- Sunset
- 20:12
- Next sunrise
- 05:24
A day hour lasts 1h 14m; a night hour, 46 min. Local time (America/Argentina/Buenos_Aires).
Day
- 1☉︎ Sun05:23 – 06:37
- 2♀︎ Venus06:37 – 07:51
- 3☿︎ Mercury07:51 – 09:05
- 4☽︎ Moon09:05 – 10:19
- 5♄︎ Saturn10:19 – 11:33
- 6♃︎ Jupiter11:33 – 12:47
- 7♂︎ Mars12:47 – 14:01
- 8☉︎ Sun14:01 – 15:15
- 9♀︎ Venus15:15 – 16:30
- 10☿︎ Mercury16:30 – 17:44
- 11☽︎ Moon17:44 – 18:58
- 12♄︎ Saturn18:58 – 20:12
Night
- 1♃︎ Jupiter20:12 – 20:58
- 2♂︎ Mars20:58 – 21:44
- 3☉︎ Sun21:44 – 22:30
- 4♀︎ Venus22:30 – 23:16
- 5☿︎ Mercury23:16 – 00:02
- 6☽︎ Moon00:02 – 00:48
- 7♄︎ Saturn00:48 – 01:34
- 8♃︎ Jupiter01:34 – 02:20
- 9♂︎ Mars02:20 – 03:06
- 10☉︎ Sun03:06 – 03:52
- 11♀︎ Venus03:52 – 04:38
- 12☿︎ Mercury04:38 – 05:24
Other cities · Argentina
Questions
How are the planetary hours calculated in Mar del Plata?
On Sunday, 20 December 2026, the Sun rises at 05:23 and sets at 20:12: the day lasts 14h 48m, that is twelve day hours of 1h 14m. The night, until the next sunrise at 05:24, lasts 9h 12m: twelve night hours of 46 min.
Which planet rules the first hour that day?
The Sun, from 05:23 to 06:37: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Venus, Mercury, the Moon, Saturn, Jupiter, Mars, then the Sun 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.