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 Friday, 4 December 2026: day of Venus
- Sunrise
- 04:59
- Sunset
- 18:27
- Next sunrise
- 04:59
A day hour lasts 1h 07m; a night hour, 53 min. Local time (America/Sao_Paulo).
Day
- 1♀︎ Venus04:59 – 06:06
- 2☿︎ Mercury06:06 – 07:13
- 3☽︎ Moon07:13 – 08:21
- 4♄︎ Saturn08:21 – 09:28
- 5♃︎ Jupiter09:28 – 10:35
- 6♂︎ Mars10:35 – 11:43
- 7☉︎ Sun11:43 – 12:50
- 8♀︎ Venus12:50 – 13:57
- 9☿︎ Mercury13:57 – 15:05
- 10☽︎ Moon15:05 – 16:12
- 11♄︎ Saturn16:12 – 17:19
- 12♃︎ Jupiter17:19 – 18:27
Night
- 1♂︎ Mars18:27 – 19:19
- 2☉︎ Sun19:19 – 20:12
- 3♀︎ Venus20:12 – 21:05
- 4☿︎ Mercury21:05 – 21:57
- 5☽︎ Moon21:57 – 22:50
- 6♄︎ Saturn22:50 – 23:43
- 7♃︎ Jupiter23:43 – 00:35
- 8♂︎ Mars00:35 – 01:28
- 9☉︎ Sun01:28 – 02:21
- 10♀︎ Venus02:21 – 03:13
- 11☿︎ Mercury03:13 – 04:06
- 12☽︎ Moon04:06 – 04:59
Other cities · Brazil
Questions
How are the planetary hours calculated in Rio de Janeiro?
On Friday, 4 December 2026, the Sun rises at 04:59 and sets at 18:27: the day lasts 13h 28m, that is twelve day hours of 1h 07m. The night, until the next sunrise at 04:59, lasts 10h 32m: twelve night hours of 53 min.
Which planet rules the first hour that day?
Venus, from 04:59 to 06:06: 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.