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, 31 October 2025: day of Venus
- Sunrise
- 05:07
- Sunset
- 18:04
- Next sunrise
- 05:07
A day hour lasts 1h 05m; a night hour, 55 min. Local time (America/Sao_Paulo).
Day
- 1♀︎ Venus05:07 – 06:12
- 2☿︎ Mercury06:12 – 07:17
- 3☽︎ Moon07:17 – 08:22
- 4♄︎ Saturn08:22 – 09:26
- 5♃︎ Jupiter09:26 – 10:31
- 6♂︎ Mars10:31 – 11:36
- 7☉︎ Sun11:36 – 12:41
- 8♀︎ Venus12:41 – 13:45
- 9☿︎ Mercury13:45 – 14:50
- 10☽︎ Moon14:50 – 15:55
- 11♄︎ Saturn15:55 – 17:00
- 12♃︎ Jupiter17:00 – 18:04
Night
- 1♂︎ Mars18:04 – 19:00
- 2☉︎ Sun19:00 – 19:55
- 3♀︎ Venus19:55 – 20:50
- 4☿︎ Mercury20:50 – 21:45
- 5☽︎ Moon21:45 – 22:40
- 6♄︎ Saturn22:40 – 23:36
- 7♃︎ Jupiter23:36 – 00:31
- 8♂︎ Mars00:31 – 01:26
- 9☉︎ Sun01:26 – 02:21
- 10♀︎ Venus02:21 – 03:16
- 11☿︎ Mercury03:16 – 04:12
- 12☽︎ Moon04:12 – 05:07
Other cities · Brazil
Questions
How are the planetary hours calculated in Rio de Janeiro?
On Friday, 31 October 2025, the Sun rises at 05:07 and sets at 18:04: the day lasts 12h 57m, that is twelve day hours of 1h 05m. The night, until the next sunrise at 05:07, lasts 11h 02m: twelve night hours of 55 min.
Which planet rules the first hour that day?
Venus, from 05:07 to 06:12: 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.