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, 4 September 2026: day of Venus
- Sunrise
- 07:07
- Sunset
- 18:31
- Next sunrise
- 07:05
A day hour lasts 57 min; a night hour, 1h 03m. Local time (America/Argentina/Buenos_Aires).
Day
- 1♀︎ Venus07:07 – 08:04
- 2☿︎ Mercury08:04 – 09:01
- 3☽︎ Moon09:01 – 09:58
- 4♄︎ Saturn09:58 – 10:55
- 5♃︎ Jupiter10:55 – 11:52
- 6♂︎ Mars11:52 – 12:49
- 7☉︎ Sun12:49 – 13:46
- 8♀︎ Venus13:46 – 14:43
- 9☿︎ Mercury14:43 – 15:40
- 10☽︎ Moon15:40 – 16:37
- 11♄︎ Saturn16:37 – 17:34
- 12♃︎ Jupiter17:34 – 18:31
Night
- 1♂︎ Mars18:31 – 19:34
- 2☉︎ Sun19:34 – 20:37
- 3♀︎ Venus20:37 – 21:40
- 4☿︎ Mercury21:40 – 22:43
- 5☽︎ Moon22:43 – 23:45
- 6♄︎ Saturn23:45 – 00:48
- 7♃︎ Jupiter00:48 – 01:51
- 8♂︎ Mars01:51 – 02:54
- 9☉︎ Sun02:54 – 03:57
- 10♀︎ Venus03:57 – 05:00
- 11☿︎ Mercury05:00 – 06:02
- 12☽︎ Moon06:02 – 07:05
Other cities · Argentina
Questions
How are the planetary hours calculated in Mar del Plata?
On Friday, 4 September 2026, the Sun rises at 07:07 and sets at 18:31: the day lasts 11h 24m, that is twelve day hours of 57 min. The night, until the next sunrise at 07:05, lasts 12h 34m: twelve night hours of 1h 03m.
Which planet rules the first hour that day?
Venus, from 07:07 to 08:04: 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.