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 Tuesday, 2 December 2025: day of Mars
- Sunrise
- 04:58
- Sunset
- 18:25
- Next sunrise
- 04:58
A day hour lasts 1h 07m; a night hour, 53 min. Local time (America/Sao_Paulo).
Day
- 1♂︎ Mars04:58 – 06:06
- 2☉︎ Sun06:06 – 07:13
- 3♀︎ Venus07:13 – 08:20
- 4☿︎ Mercury08:20 – 09:27
- 5☽︎ Moon09:27 – 10:35
- 6♄︎ Saturn10:35 – 11:42
- 7♃︎ Jupiter11:42 – 12:49
- 8♂︎ Mars12:49 – 13:56
- 9☉︎ Sun13:56 – 15:04
- 10♀︎ Venus15:04 – 16:11
- 11☿︎ Mercury16:11 – 17:18
- 12☽︎ Moon17:18 – 18:25
Night
- 1♄︎ Saturn18:25 – 19:18
- 2♃︎ Jupiter19:18 – 20:11
- 3♂︎ Mars20:11 – 21:04
- 4☉︎ Sun21:04 – 21:56
- 5♀︎ Venus21:56 – 22:49
- 6☿︎ Mercury22:49 – 23:42
- 7☽︎ Moon23:42 – 00:35
- 8♄︎ Saturn00:35 – 01:27
- 9♃︎ Jupiter01:27 – 02:20
- 10♂︎ Mars02:20 – 03:13
- 11☉︎ Sun03:13 – 04:06
- 12♀︎ Venus04:06 – 04:58
Other cities · Brazil
Questions
How are the planetary hours calculated in Rio de Janeiro?
On Tuesday, 2 December 2025, the Sun rises at 04:58 and sets at 18:25: the day lasts 13h 27m, that is twelve day hours of 1h 07m. The night, until the next sunrise at 04:58, lasts 10h 33m: twelve night hours of 53 min.
Which planet rules the first hour that day?
Mars, from 04:58 to 06:06: 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.