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, 20 October 2026: day of Mars
- Sunrise
- 05:14
- Sunset
- 17:31
- Next sunrise
- 05:14
A day hour lasts 1h 01m; a night hour, 59 min. Local time (Asia/Jakarta).
Day
- 1♂︎ Mars05:14 – 06:16
- 2☉︎ Sun06:16 – 07:17
- 3♀︎ Venus07:17 – 08:18
- 4☿︎ Mercury08:18 – 09:20
- 5☽︎ Moon09:20 – 10:21
- 6♄︎ Saturn10:21 – 11:23
- 7♃︎ Jupiter11:23 – 12:24
- 8♂︎ Mars12:24 – 13:26
- 9☉︎ Sun13:26 – 14:27
- 10♀︎ Venus14:27 – 15:28
- 11☿︎ Mercury15:28 – 16:30
- 12☽︎ Moon16:30 – 17:31
Night
- 1♄︎ Saturn17:31 – 18:30
- 2♃︎ Jupiter18:30 – 19:28
- 3♂︎ Mars19:28 – 20:27
- 4☉︎ Sun20:27 – 21:25
- 5♀︎ Venus21:25 – 22:24
- 6☿︎ Mercury22:24 – 23:23
- 7☽︎ Moon23:23 – 00:21
- 8♄︎ Saturn00:21 – 01:20
- 9♃︎ Jupiter01:20 – 02:18
- 10♂︎ Mars02:18 – 03:17
- 11☉︎ Sun03:17 – 04:15
- 12♀︎ Venus04:15 – 05:14
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Questions
How are the planetary hours calculated in Semarang?
On Tuesday, 20 October 2026, the Sun rises at 05:14 and sets at 17:31: the day lasts 12h 17m, that is twelve day hours of 1h 01m. The night, until the next sunrise at 05:14, lasts 11h 43m: twelve night hours of 59 min.
Which planet rules the first hour that day?
Mars, from 05:14 to 06:16: 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.