Planetary hours
in San Miguel de Tucumán.
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, 18 August 2026: day of Mars
- Sunrise
- 07:47
- Sunset
- 19:01
- Next sunrise
- 07:46
A day hour lasts 56 min; a night hour, 1h 04m. Local time (America/Argentina/Tucuman).
Day
- 1♂︎ Mars07:47 – 08:43
- 2☉︎ Sun08:43 – 09:40
- 3♀︎ Venus09:40 – 10:36
- 4☿︎ Mercury10:36 – 11:32
- 5☽︎ Moon11:32 – 12:28
- 6♄︎ Saturn12:28 – 13:24
- 7♃︎ Jupiter13:24 – 14:21
- 8♂︎ Mars14:21 – 15:17
- 9☉︎ Sun15:17 – 16:13
- 10♀︎ Venus16:13 – 17:09
- 11☿︎ Mercury17:09 – 18:05
- 12☽︎ Moon18:05 – 19:01
Night
- 1♄︎ Saturn19:01 – 20:05
- 2♃︎ Jupiter20:05 – 21:09
- 3♂︎ Mars21:09 – 22:13
- 4☉︎ Sun22:13 – 23:16
- 5♀︎ Venus23:16 – 00:20
- 6☿︎ Mercury00:20 – 01:24
- 7☽︎ Moon01:24 – 02:28
- 8♄︎ Saturn02:28 – 03:31
- 9♃︎ Jupiter03:31 – 04:35
- 10♂︎ Mars04:35 – 05:39
- 11☉︎ Sun05:39 – 06:43
- 12♀︎ Venus06:43 – 07:46
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Questions
How are the planetary hours calculated in San Miguel de Tucumán?
On Tuesday, 18 August 2026, the Sun rises at 07:47 and sets at 19:01: the day lasts 11h 14m, that is twelve day hours of 56 min. The night, until the next sunrise at 07:46, lasts 12h 45m: twelve night hours of 1h 04m.
Which planet rules the first hour that day?
Mars, from 07:47 to 08:43: 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.