Planetary hours
in Merlo.
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 Tuesday, 18 August 2026: day of Mars
- Sunrise
- 07:31
- Sunset
- 18:26
- Next sunrise
- 07:30
A day hour lasts 55 min; a night hour, 1h 05m. Local time (America/Argentina/Buenos_Aires).
Day
- 1♂︎ Mars07:31 – 08:25
- 2☉︎ Sun08:25 – 09:20
- 3♀︎ Venus09:20 – 10:15
- 4☿︎ Mercury10:15 – 11:09
- 5☽︎ Moon11:09 – 12:04
- 6♄︎ Saturn12:04 – 12:58
- 7♃︎ Jupiter12:58 – 13:53
- 8♂︎ Mars13:53 – 14:48
- 9☉︎ Sun14:48 – 15:42
- 10♀︎ Venus15:42 – 16:37
- 11☿︎ Mercury16:37 – 17:31
- 12☽︎ Moon17:31 – 18:26
Night
- 1♄︎ Saturn18:26 – 19:31
- 2♃︎ Jupiter19:31 – 20:37
- 3♂︎ Mars20:37 – 21:42
- 4☉︎ Sun21:42 – 22:47
- 5♀︎ Venus22:47 – 23:53
- 6☿︎ Mercury23:53 – 00:58
- 7☽︎ Moon00:58 – 02:03
- 8♄︎ Saturn02:03 – 03:08
- 9♃︎ Jupiter03:08 – 04:14
- 10♂︎ Mars04:14 – 05:19
- 11☉︎ Sun05:19 – 06:24
- 12♀︎ Venus06:24 – 07:30
Other cities · Argentina
Questions
How are the planetary hours calculated in Merlo?
On Tuesday, 18 August 2026, the Sun rises at 07:31 and sets at 18:26: the day lasts 10h 55m, that is twelve day hours of 55 min. The night, until the next sunrise at 07:30, lasts 13h 04m: twelve night hours of 1h 05m.
Which planet rules the first hour that day?
Mars, from 07:31 to 08:25: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars 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.