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 Saturday, 25 October 2025: day of Saturn
- Sunrise
- 05:12
- Sunset
- 18:01
- Next sunrise
- 05:11
A day hour lasts 1h 04m; a night hour, 56 min. Local time (America/Sao_Paulo).
Day
- 1♄︎ Saturn05:12 – 06:16
- 2♃︎ Jupiter06:16 – 07:20
- 3♂︎ Mars07:20 – 08:24
- 4☉︎ Sun08:24 – 09:28
- 5♀︎ Venus09:28 – 10:32
- 6☿︎ Mercury10:32 – 11:36
- 7☽︎ Moon11:36 – 12:41
- 8♄︎ Saturn12:41 – 13:45
- 9♃︎ Jupiter13:45 – 14:49
- 10♂︎ Mars14:49 – 15:53
- 11☉︎ Sun15:53 – 16:57
- 12♀︎ Venus16:57 – 18:01
Night
- 1☿︎ Mercury18:01 – 18:57
- 2☽︎ Moon18:57 – 19:53
- 3♄︎ Saturn19:53 – 20:49
- 4♃︎ Jupiter20:49 – 21:44
- 5♂︎ Mars21:44 – 22:40
- 6☉︎ Sun22:40 – 23:36
- 7♀︎ Venus23:36 – 00:32
- 8☿︎ Mercury00:32 – 01:28
- 9☽︎ Moon01:28 – 02:23
- 10♄︎ Saturn02:23 – 03:19
- 11♃︎ Jupiter03:19 – 04:15
- 12♂︎ Mars04:15 – 05:11
Other cities · Brazil
Questions
How are the planetary hours calculated in Rio de Janeiro?
On Saturday, 25 October 2025, the Sun rises at 05:12 and sets at 18:01: the day lasts 12h 50m, that is twelve day hours of 1h 04m. The night, until the next sunrise at 05:11, lasts 11h 10m: twelve night hours of 56 min.
Which planet rules the first hour that day?
Saturn, from 05:12 to 06:16: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn 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.