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 Tuesday, 16 December 2025: day of Mars
- Sunrise
- 07:39
- Sunset
- 16:21
- Next sunrise
- 07:40
A day hour lasts 44 min; a night hour, 1h 17m. Local time (Europe/Rome).
Day
- 1♂︎ Mars07:39 – 08:22
- 2☉︎ Sun08:22 – 09:06
- 3♀︎ Venus09:06 – 09:49
- 4☿︎ Mercury09:49 – 10:33
- 5☽︎ Moon10:33 – 11:17
- 6♄︎ Saturn11:17 – 12:00
- 7♃︎ Jupiter12:00 – 12:44
- 8♂︎ Mars12:44 – 13:27
- 9☉︎ Sun13:27 – 14:11
- 10♀︎ Venus14:11 – 14:54
- 11☿︎ Mercury14:54 – 15:38
- 12☽︎ Moon15:38 – 16:21
Night
- 1♄︎ Saturn16:21 – 17:38
- 2♃︎ Jupiter17:38 – 18:54
- 3♂︎ Mars18:54 – 20:11
- 4☉︎ Sun20:11 – 21:27
- 5♀︎ Venus21:27 – 22:44
- 6☿︎ Mercury22:44 – 00:00
- 7☽︎ Moon00:00 – 01:17
- 8♄︎ Saturn01:17 – 02:33
- 9♃︎ Jupiter02:33 – 03:50
- 10♂︎ Mars03:50 – 05:07
- 11☉︎ Sun05:07 – 06:23
- 12♀︎ Venus06:23 – 07:40
Questions
How are the planetary hours calculated in Trieste?
On Tuesday, 16 December 2025, the Sun rises at 07:39 and sets at 16:21: the day lasts 8h 42m, that is twelve day hours of 44 min. The night, until the next sunrise at 07:40, lasts 15h 18m: twelve night hours of 1h 17m.
Which planet rules the first hour that day?
Mars, from 07:39 to 08:22: 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.