Planetary hours
in Houston.
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, 18 August 2026: day of Mars
- Sunrise
- 06:50
- Sunset
- 19:59
- Next sunrise
- 06:51
A day hour lasts 1h 06m; a night hour, 54 min. Local time (America/Chicago).
Day
- 1♂︎ Mars06:50 – 07:56
- 2☉︎ Sun07:56 – 09:02
- 3♀︎ Venus09:02 – 10:08
- 4☿︎ Mercury10:08 – 11:13
- 5☽︎ Moon11:13 – 12:19
- 6♄︎ Saturn12:19 – 13:25
- 7♃︎ Jupiter13:25 – 14:30
- 8♂︎ Mars14:30 – 15:36
- 9☉︎ Sun15:36 – 16:42
- 10♀︎ Venus16:42 – 17:47
- 11☿︎ Mercury17:47 – 18:53
- 12☽︎ Moon18:53 – 19:59
Night
- 1♄︎ Saturn19:59 – 20:53
- 2♃︎ Jupiter20:53 – 21:47
- 3♂︎ Mars21:47 – 22:42
- 4☉︎ Sun22:42 – 23:36
- 5♀︎ Venus23:36 – 00:30
- 6☿︎ Mercury00:30 – 01:25
- 7☽︎ Moon01:25 – 02:19
- 8♄︎ Saturn02:19 – 03:14
- 9♃︎ Jupiter03:14 – 04:08
- 10♂︎ Mars04:08 – 05:02
- 11☉︎ Sun05:02 – 05:57
- 12♀︎ Venus05:57 – 06:51
Other cities · United States
Questions
How are the planetary hours calculated in Houston?
On Tuesday, 18 August 2026, the Sun rises at 06:50 and sets at 19:59: the day lasts 13h 08m, that is twelve day hours of 1h 06m. The night, until the next sunrise at 06:51, lasts 10h 52m: twelve night hours of 54 min.
Which planet rules the first hour that day?
Mars, from 06:50 to 07:56: 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.