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, 22 September 2025: day of the Moon
- Sunrise
- 05:18
- Sunset
- 17:24
- Next sunrise
- 05:18
A day hour lasts 1h 01m; a night hour, 59 min. Local time (Asia/Jakarta).
Day
- 1☽︎ Moon05:18 – 06:19
- 2♄︎ Saturn06:19 – 07:19
- 3♃︎ Jupiter07:19 – 08:20
- 4♂︎ Mars08:20 – 09:20
- 5☉︎ Sun09:20 – 10:21
- 6♀︎ Venus10:21 – 11:21
- 7☿︎ Mercury11:21 – 12:22
- 8☽︎ Moon12:22 – 13:22
- 9♄︎ Saturn13:22 – 14:23
- 10♃︎ Jupiter14:23 – 15:23
- 11♂︎ Mars15:23 – 16:24
- 12☉︎ Sun16:24 – 17:24
Night
- 1♀︎ Venus17:24 – 18:24
- 2☿︎ Mercury18:24 – 19:23
- 3☽︎ Moon19:23 – 20:23
- 4♄︎ Saturn20:23 – 21:22
- 5♃︎ Jupiter21:22 – 22:22
- 6♂︎ Mars22:22 – 23:21
- 7☉︎ Sun23:21 – 00:20
- 8♀︎ Venus00:20 – 01:20
- 9☿︎ Mercury01:20 – 02:19
- 10☽︎ Moon02:19 – 03:19
- 11♄︎ Saturn03:19 – 04:18
- 12♃︎ Jupiter04:18 – 05:18
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Questions
How are the planetary hours calculated in Surabaya?
On Monday, 22 September 2025, the Sun rises at 05:18 and sets at 17:24: the day lasts 12h 06m, that is twelve day hours of 1h 01m. The night, until the next sunrise at 05:18, lasts 11h 53m: twelve night hours of 59 min.
Which planet rules the first hour that day?
The Moon, from 05:18 to 06:19: 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.