Planetary hours
in Trieste.
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, 12 December 2025: day of Venus
- Sunrise
- 07:36
- Sunset
- 16:20
- Next sunrise
- 07:37
A day hour lasts 44 min; a night hour, 1h 16m. Local time (Europe/Rome).
Day
- 1♀︎ Venus07:36 – 08:20
- 2☿︎ Mercury08:20 – 09:03
- 3☽︎ Moon09:03 – 09:47
- 4♄︎ Saturn09:47 – 10:31
- 5♃︎ Jupiter10:31 – 11:14
- 6♂︎ Mars11:14 – 11:58
- 7☉︎ Sun11:58 – 12:42
- 8♀︎ Venus12:42 – 13:26
- 9☿︎ Mercury13:26 – 14:09
- 10☽︎ Moon14:09 – 14:53
- 11♄︎ Saturn14:53 – 15:37
- 12♃︎ Jupiter15:37 – 16:20
Night
- 1♂︎ Mars16:20 – 17:37
- 2☉︎ Sun17:37 – 18:53
- 3♀︎ Venus18:53 – 20:09
- 4☿︎ Mercury20:09 – 21:26
- 5☽︎ Moon21:26 – 22:42
- 6♄︎ Saturn22:42 – 23:59
- 7♃︎ Jupiter23:59 – 01:15
- 8♂︎ Mars01:15 – 02:31
- 9☉︎ Sun02:31 – 03:48
- 10♀︎ Venus03:48 – 05:04
- 11☿︎ Mercury05:04 – 06:20
- 12☽︎ Moon06:20 – 07:37
Questions
How are the planetary hours calculated in Trieste?
On Friday, 12 December 2025, the Sun rises at 07:36 and sets at 16:20: the day lasts 8h 45m, that is twelve day hours of 44 min. The night, until the next sunrise at 07:37, lasts 15h 16m: twelve night hours of 1h 16m.
Which planet rules the first hour that day?
Venus, from 07:36 to 08:20: 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.