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 Thursday, 11 December 2025: day of Jupiter
- Sunrise
- 05:06
- Sunset
- 17:38
- Next sunrise
- 05:06
A day hour lasts 1h 03m; a night hour, 57 min. Local time (Asia/Jakarta).
Day
- 1♃︎ Jupiter05:06 – 06:08
- 2♂︎ Mars06:08 – 07:11
- 3☉︎ Sun07:11 – 08:14
- 4♀︎ Venus08:14 – 09:16
- 5☿︎ Mercury09:16 – 10:19
- 6☽︎ Moon10:19 – 11:22
- 7♄︎ Saturn11:22 – 12:24
- 8♃︎ Jupiter12:24 – 13:27
- 9♂︎ Mars13:27 – 14:30
- 10☉︎ Sun14:30 – 15:32
- 11♀︎ Venus15:32 – 16:35
- 12☿︎ Mercury16:35 – 17:38
Night
- 1☽︎ Moon17:38 – 18:35
- 2♄︎ Saturn18:35 – 19:33
- 3♃︎ Jupiter19:33 – 20:30
- 4♂︎ Mars20:30 – 21:27
- 5☉︎ Sun21:27 – 22:25
- 6♀︎ Venus22:25 – 23:22
- 7☿︎ Mercury23:22 – 00:19
- 8☽︎ Moon00:19 – 01:17
- 9♄︎ Saturn01:17 – 02:14
- 10♃︎ Jupiter02:14 – 03:11
- 11♂︎ Mars03:11 – 04:09
- 12☉︎ Sun04:09 – 05:06
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Questions
How are the planetary hours calculated in Surabaya?
On Thursday, 11 December 2025, the Sun rises at 05:06 and sets at 17:38: the day lasts 12h 32m, that is twelve day hours of 1h 03m. The night, until the next sunrise at 05:06, lasts 11h 28m: twelve night hours of 57 min.
Which planet rules the first hour that day?
Jupiter, from 05:06 to 06:08: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mars, the Sun, Venus, Mercury, the Moon, Saturn, then Jupiter 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.