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 Sunday, 18 October 2026: day of the Sun
- Sunrise
- 05:15
- Sunset
- 17:31
- Next sunrise
- 05:15
A day hour lasts 1h 01m; a night hour, 59 min. Local time (Asia/Jakarta).
Day
- 1☉︎ Sun05:15 – 06:16
- 2♀︎ Venus06:16 – 07:18
- 3☿︎ Mercury07:18 – 08:19
- 4☽︎ Moon08:19 – 09:20
- 5♄︎ Saturn09:20 – 10:22
- 6♃︎ Jupiter10:22 – 11:23
- 7♂︎ Mars11:23 – 12:24
- 8☉︎ Sun12:24 – 13:26
- 9♀︎ Venus13:26 – 14:27
- 10☿︎ Mercury14:27 – 15:28
- 11☽︎ Moon15:28 – 16:30
- 12♄︎ Saturn16:30 – 17:31
Night
- 1♃︎ Jupiter17:31 – 18:30
- 2♂︎ Mars18:30 – 19:28
- 3☉︎ Sun19:28 – 20:27
- 4♀︎ Venus20:27 – 21:26
- 5☿︎ Mercury21:26 – 22:24
- 6☽︎ Moon22:24 – 23:23
- 7♄︎ Saturn23:23 – 00:21
- 8♃︎ Jupiter00:21 – 01:20
- 9♂︎ Mars01:20 – 02:19
- 10☉︎ Sun02:19 – 03:17
- 11♀︎ Venus03:17 – 04:16
- 12☿︎ Mercury04:16 – 05:15
Other cities · Indonesia
Questions
How are the planetary hours calculated in Semarang?
On Sunday, 18 October 2026, the Sun rises at 05:15 and sets at 17:31: the day lasts 12h 16m, that is twelve day hours of 1h 01m. The night, until the next sunrise at 05:15, lasts 11h 43m: twelve night hours of 59 min.
Which planet rules the first hour that day?
The Sun, from 05:15 to 06:16: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Venus, Mercury, the Moon, Saturn, Jupiter, Mars, then the Sun 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.