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 Friday, 18 December 2026: day of Venus
- Sunrise
- 05:37
- Sunset
- 20:06
- Next sunrise
- 05:37
A day hour lasts 1h 12m; a night hour, 48 min. Local time (America/Argentina/Buenos_Aires).
Day
- 1♀︎ Venus05:37 – 06:49
- 2☿︎ Mercury06:49 – 08:01
- 3☽︎ Moon08:01 – 09:14
- 4♄︎ Saturn09:14 – 10:26
- 5♃︎ Jupiter10:26 – 11:39
- 6♂︎ Mars11:39 – 12:51
- 7☉︎ Sun12:51 – 14:04
- 8♀︎ Venus14:04 – 15:16
- 9☿︎ Mercury15:16 – 16:28
- 10☽︎ Moon16:28 – 17:41
- 11♄︎ Saturn17:41 – 18:53
- 12♃︎ Jupiter18:53 – 20:06
Night
- 1♂︎ Mars20:06 – 20:53
- 2☉︎ Sun20:53 – 21:41
- 3♀︎ Venus21:41 – 22:28
- 4☿︎ Mercury22:28 – 23:16
- 5☽︎ Moon23:16 – 00:04
- 6♄︎ Saturn00:04 – 00:51
- 7♃︎ Jupiter00:51 – 01:39
- 8♂︎ Mars01:39 – 02:27
- 9☉︎ Sun02:27 – 03:14
- 10♀︎ Venus03:14 – 04:02
- 11☿︎ Mercury04:02 – 04:49
- 12☽︎ Moon04:49 – 05:37
Other cities · Argentina
Questions
How are the planetary hours calculated in Merlo?
On Friday, 18 December 2026, the Sun rises at 05:37 and sets at 20:06: the day lasts 14h 29m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 05:37, lasts 9h 32m: twelve night hours of 48 min.
Which planet rules the first hour that day?
Venus, from 05:37 to 06:49: 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.