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, 25 December 2026: day of Venus
- Sunrise
- 05:40
- Sunset
- 20:09
- Next sunrise
- 05:41
A day hour lasts 1h 12m; a night hour, 48 min. Local time (America/Argentina/Buenos_Aires).
Day
- 1♀︎ Venus05:40 – 06:53
- 2☿︎ Mercury06:53 – 08:05
- 3☽︎ Moon08:05 – 09:17
- 4♄︎ Saturn09:17 – 10:30
- 5♃︎ Jupiter10:30 – 11:42
- 6♂︎ Mars11:42 – 12:55
- 7☉︎ Sun12:55 – 14:07
- 8♀︎ Venus14:07 – 15:19
- 9☿︎ Mercury15:19 – 16:32
- 10☽︎ Moon16:32 – 17:44
- 11♄︎ Saturn17:44 – 18:57
- 12♃︎ Jupiter18:57 – 20:09
Night
- 1♂︎ Mars20:09 – 20:57
- 2☉︎ Sun20:57 – 21:44
- 3♀︎ Venus21:44 – 22:32
- 4☿︎ Mercury22:32 – 23:20
- 5☽︎ Moon23:20 – 00:07
- 6♄︎ Saturn00:07 – 00:55
- 7♃︎ Jupiter00:55 – 01:42
- 8♂︎ Mars01:42 – 02:30
- 9☉︎ Sun02:30 – 03:18
- 10♀︎ Venus03:18 – 04:05
- 11☿︎ Mercury04:05 – 04:53
- 12☽︎ Moon04:53 – 05:41
Other cities · Argentina
Questions
How are the planetary hours calculated in Merlo?
On Friday, 25 December 2026, the Sun rises at 05:40 and sets at 20:09: the day lasts 14h 29m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 05:41, lasts 9h 32m: twelve night hours of 48 min.
Which planet rules the first hour that day?
Venus, from 05:40 to 06:53: 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.