Planetary hours
in Surabaya.
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 Monday, 29 December 2025: day of the Moon
- Sunrise
- 05:14
- Sunset
- 17:47
- Next sunrise
- 05:15
A day hour lasts 1h 03m; a night hour, 57 min. Local time (Asia/Jakarta).
Day
- 1☽︎ Moon05:14 – 06:17
- 2♄︎ Saturn06:17 – 07:20
- 3♃︎ Jupiter07:20 – 08:22
- 4♂︎ Mars08:22 – 09:25
- 5☉︎ Sun09:25 – 10:28
- 6♀︎ Venus10:28 – 11:30
- 7☿︎ Mercury11:30 – 12:33
- 8☽︎ Moon12:33 – 13:36
- 9♄︎ Saturn13:36 – 14:39
- 10♃︎ Jupiter14:39 – 15:41
- 11♂︎ Mars15:41 – 16:44
- 12☉︎ Sun16:44 – 17:47
Night
- 1♀︎ Venus17:47 – 18:44
- 2☿︎ Mercury18:44 – 19:41
- 3☽︎ Moon19:41 – 20:39
- 4♄︎ Saturn20:39 – 21:36
- 5♃︎ Jupiter21:36 – 22:33
- 6♂︎ Mars22:33 – 23:31
- 7☉︎ Sun23:31 – 00:28
- 8♀︎ Venus00:28 – 01:25
- 9☿︎ Mercury01:25 – 02:23
- 10☽︎ Moon02:23 – 03:20
- 11♄︎ Saturn03:20 – 04:17
- 12♃︎ Jupiter04:17 – 05:15
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Questions
How are the planetary hours calculated in Surabaya?
On Monday, 29 December 2025, the Sun rises at 05:14 and sets at 17:47: the day lasts 12h 33m, that is twelve day hours of 1h 03m. The night, until the next sunrise at 05:15, lasts 11h 28m: twelve night hours of 57 min.
Which planet rules the first hour that day?
The Moon, from 05:14 to 06:17: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Saturn, Jupiter, Mars, the Sun, Venus, Mercury, then the Moon 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.