Planetary hours
in Semarang.
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, 15 December 2026: day of Mars
- Sunrise
- 05:17
- Sunset
- 17:49
- Next sunrise
- 05:17
A day hour lasts 1h 03m; a night hour, 57 min. Local time (Asia/Jakarta).
Day
- 1♂︎ Mars05:17 – 06:20
- 2☉︎ Sun06:20 – 07:22
- 3♀︎ Venus07:22 – 08:25
- 4☿︎ Mercury08:25 – 09:28
- 5☽︎ Moon09:28 – 10:30
- 6♄︎ Saturn10:30 – 11:33
- 7♃︎ Jupiter11:33 – 12:35
- 8♂︎ Mars12:35 – 13:38
- 9☉︎ Sun13:38 – 14:41
- 10♀︎ Venus14:41 – 15:43
- 11☿︎ Mercury15:43 – 16:46
- 12☽︎ Moon16:46 – 17:49
Night
- 1♄︎ Saturn17:49 – 18:46
- 2♃︎ Jupiter18:46 – 19:43
- 3♂︎ Mars19:43 – 20:41
- 4☉︎ Sun20:41 – 21:38
- 5♀︎ Venus21:38 – 22:36
- 6☿︎ Mercury22:36 – 23:33
- 7☽︎ Moon23:33 – 00:30
- 8♄︎ Saturn00:30 – 01:28
- 9♃︎ Jupiter01:28 – 02:25
- 10♂︎ Mars02:25 – 03:23
- 11☉︎ Sun03:23 – 04:20
- 12♀︎ Venus04:20 – 05:17
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Questions
How are the planetary hours calculated in Semarang?
On Tuesday, 15 December 2026, the Sun rises at 05:17 and sets at 17:49: the day lasts 12h 32m, that is twelve day hours of 1h 03m. The night, until the next sunrise at 05:17, lasts 11h 29m: twelve night hours of 57 min.
Which planet rules the first hour that day?
Mars, from 05:17 to 06:20: 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.