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, 12 May 2026: day of Mars
- Sunrise
- 07:39
- Sunset
- 18:02
- Next sunrise
- 07:40
A day hour lasts 52 min; a night hour, 1h 08m. Local time (America/Argentina/Buenos_Aires).
Day
- 1♂︎ Mars07:39 – 08:31
- 2☉︎ Sun08:31 – 09:23
- 3♀︎ Venus09:23 – 10:15
- 4☿︎ Mercury10:15 – 11:07
- 5☽︎ Moon11:07 – 11:59
- 6♄︎ Saturn11:59 – 12:51
- 7♃︎ Jupiter12:51 – 13:43
- 8♂︎ Mars13:43 – 14:35
- 9☉︎ Sun14:35 – 15:26
- 10♀︎ Venus15:26 – 16:18
- 11☿︎ Mercury16:18 – 17:10
- 12☽︎ Moon17:10 – 18:02
Night
- 1♄︎ Saturn18:02 – 19:10
- 2♃︎ Jupiter19:10 – 20:19
- 3♂︎ Mars20:19 – 21:27
- 4☉︎ Sun21:27 – 22:35
- 5♀︎ Venus22:35 – 23:43
- 6☿︎ Mercury23:43 – 00:51
- 7☽︎ Moon00:51 – 01:59
- 8♄︎ Saturn01:59 – 03:07
- 9♃︎ Jupiter03:07 – 04:15
- 10♂︎ Mars04:15 – 05:23
- 11☉︎ Sun05:23 – 06:32
- 12♀︎ Venus06:32 – 07:40
Other cities · Argentina
Questions
How are the planetary hours calculated in Merlo?
On Tuesday, 12 May 2026, the Sun rises at 07:39 and sets at 18:02: the day lasts 10h 23m, that is twelve day hours of 52 min. The night, until the next sunrise at 07:40, lasts 13h 37m: twelve night hours of 1h 08m.
Which planet rules the first hour that day?
Mars, from 07:39 to 08:31: 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.