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, 23 January 2026: day of Venus
- Sunrise
- 05:53
- Sunset
- 20:10
- Next sunrise
- 05:54
A day hour lasts 1h 11m; a night hour, 49 min. Local time (America/Argentina/Buenos_Aires).
Day
- 1♀︎ Venus05:53 – 07:04
- 2☿︎ Mercury07:04 – 08:16
- 3☽︎ Moon08:16 – 09:27
- 4♄︎ Saturn09:27 – 10:39
- 5♃︎ Jupiter10:39 – 11:50
- 6♂︎ Mars11:50 – 13:01
- 7☉︎ Sun13:01 – 14:13
- 8♀︎ Venus14:13 – 15:24
- 9☿︎ Mercury15:24 – 16:36
- 10☽︎ Moon16:36 – 17:47
- 11♄︎ Saturn17:47 – 18:58
- 12♃︎ Jupiter18:58 – 20:10
Night
- 1♂︎ Mars20:10 – 20:58
- 2☉︎ Sun20:58 – 21:47
- 3♀︎ Venus21:47 – 22:36
- 4☿︎ Mercury22:36 – 23:25
- 5☽︎ Moon23:25 – 00:13
- 6♄︎ Saturn00:13 – 01:02
- 7♃︎ Jupiter01:02 – 01:51
- 8♂︎ Mars01:51 – 02:39
- 9☉︎ Sun02:39 – 03:28
- 10♀︎ Venus03:28 – 04:17
- 11☿︎ Mercury04:17 – 05:05
- 12☽︎ Moon05:05 – 05:54
Other cities · Argentina
Questions
How are the planetary hours calculated in Mar del Plata?
On Friday, 23 January 2026, the Sun rises at 05:53 and sets at 20:10: the day lasts 14h 17m, that is twelve day hours of 1h 11m. The night, until the next sunrise at 05:54, lasts 9h 44m: twelve night hours of 49 min.
Which planet rules the first hour that day?
Venus, from 05:53 to 07:04: 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.