Planetary hours
in Rio de Janeiro.
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 Sunday, 13 December 2026: day of the Sun
- Sunrise
- 05:01
- Sunset
- 18:32
- Next sunrise
- 05:01
A day hour lasts 1h 08m; a night hour, 52 min. Local time (America/Sao_Paulo).
Day
- 1☉︎ Sun05:01 – 06:08
- 2♀︎ Venus06:08 – 07:16
- 3☿︎ Mercury07:16 – 08:24
- 4☽︎ Moon08:24 – 09:31
- 5♄︎ Saturn09:31 – 10:39
- 6♃︎ Jupiter10:39 – 11:46
- 7♂︎ Mars11:46 – 12:54
- 8☉︎ Sun12:54 – 14:02
- 9♀︎ Venus14:02 – 15:09
- 10☿︎ Mercury15:09 – 16:17
- 11☽︎ Moon16:17 – 17:25
- 12♄︎ Saturn17:25 – 18:32
Night
- 1♃︎ Jupiter18:32 – 19:25
- 2♂︎ Mars19:25 – 20:17
- 3☉︎ Sun20:17 – 21:09
- 4♀︎ Venus21:09 – 22:02
- 5☿︎ Mercury22:02 – 22:54
- 6☽︎ Moon22:54 – 23:47
- 7♄︎ Saturn23:47 – 00:39
- 8♃︎ Jupiter00:39 – 01:31
- 9♂︎ Mars01:31 – 02:24
- 10☉︎ Sun02:24 – 03:16
- 11♀︎ Venus03:16 – 04:09
- 12☿︎ Mercury04:09 – 05:01
Other cities · Brazil
Questions
How are the planetary hours calculated in Rio de Janeiro?
On Sunday, 13 December 2026, the Sun rises at 05:01 and sets at 18:32: the day lasts 13h 32m, that is twelve day hours of 1h 08m. The night, until the next sunrise at 05:01, lasts 10h 29m: twelve night hours of 52 min.
Which planet rules the first hour that day?
The Sun, from 05:01 to 06:08: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Venus, Mercury, the Moon, Saturn, Jupiter, Mars, then the Sun 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.