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 Monday, 21 December 2026: day of the Moon
- Sunrise
- 05:38
- Sunset
- 20:07
- Next sunrise
- 05:38
A day hour lasts 1h 12m; a night hour, 48 min. Local time (America/Argentina/Buenos_Aires).
Day
- 1☽︎ Moon05:38 – 06:50
- 2♄︎ Saturn06:50 – 08:03
- 3♃︎ Jupiter08:03 – 09:15
- 4♂︎ Mars09:15 – 10:28
- 5☉︎ Sun10:28 – 11:40
- 6♀︎ Venus11:40 – 12:53
- 7☿︎ Mercury12:53 – 14:05
- 8☽︎ Moon14:05 – 15:17
- 9♄︎ Saturn15:17 – 16:30
- 10♃︎ Jupiter16:30 – 17:42
- 11♂︎ Mars17:42 – 18:55
- 12☉︎ Sun18:55 – 20:07
Night
- 1♀︎ Venus20:07 – 20:55
- 2☿︎ Mercury20:55 – 21:42
- 3☽︎ Moon21:42 – 22:30
- 4♄︎ Saturn22:30 – 23:18
- 5♃︎ Jupiter23:18 – 00:05
- 6♂︎ Mars00:05 – 00:53
- 7☉︎ Sun00:53 – 01:40
- 8♀︎ Venus01:40 – 02:28
- 9☿︎ Mercury02:28 – 03:16
- 10☽︎ Moon03:16 – 04:03
- 11♄︎ Saturn04:03 – 04:51
- 12♃︎ Jupiter04:51 – 05:38
Other cities · Argentina
Questions
How are the planetary hours calculated in Merlo?
On Monday, 21 December 2026, the Sun rises at 05:38 and sets at 20:07: the day lasts 14h 29m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 05:38, lasts 9h 31m: twelve night hours of 48 min.
Which planet rules the first hour that day?
The Moon, from 05:38 to 06:50: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Saturn, Jupiter, Mars, the Sun, Venus, Mercury, then the Moon 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.