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 Saturday, 18 July 2026: day of Saturn
- Sunrise
- 07:58
- Sunset
- 18:04
- Next sunrise
- 07:57
A day hour lasts 51 min; a night hour, 1h 09m. Local time (America/Argentina/Buenos_Aires).
Day
- 1♄︎ Saturn07:58 – 08:48
- 2♃︎ Jupiter08:48 – 09:39
- 3♂︎ Mars09:39 – 10:29
- 4☉︎ Sun10:29 – 11:20
- 5♀︎ Venus11:20 – 12:10
- 6☿︎ Mercury12:10 – 13:01
- 7☽︎ Moon13:01 – 13:51
- 8♄︎ Saturn13:51 – 14:42
- 9♃︎ Jupiter14:42 – 15:32
- 10♂︎ Mars15:32 – 16:23
- 11☉︎ Sun16:23 – 17:13
- 12♀︎ Venus17:13 – 18:04
Night
- 1☿︎ Mercury18:04 – 19:13
- 2☽︎ Moon19:13 – 20:23
- 3♄︎ Saturn20:23 – 21:32
- 4♃︎ Jupiter21:32 – 22:42
- 5♂︎ Mars22:42 – 23:51
- 6☉︎ Sun23:51 – 01:01
- 7♀︎ Venus01:01 – 02:10
- 8☿︎ Mercury02:10 – 03:19
- 9☽︎ Moon03:19 – 04:29
- 10♄︎ Saturn04:29 – 05:38
- 11♃︎ Jupiter05:38 – 06:48
- 12♂︎ Mars06:48 – 07:57
Other cities · Argentina
Questions
How are the planetary hours calculated in Merlo?
On Saturday, 18 July 2026, the Sun rises at 07:58 and sets at 18:04: the day lasts 10h 06m, that is twelve day hours of 51 min. The night, until the next sunrise at 07:57, lasts 13h 53m: twelve night hours of 1h 09m.
Which planet rules the first hour that day?
Saturn, from 07:58 to 08:48: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn 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.