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, 13 August 2026: day of Jupiter
- Sunrise
- 05:38
- Sunset
- 17:29
- Next sunrise
- 05:37
A day hour lasts 59 min; a night hour, 1h 01m. Local time (Asia/Jakarta).
Day
- 1♃︎ Jupiter05:38 – 06:37
- 2♂︎ Mars06:37 – 07:36
- 3☉︎ Sun07:36 – 08:36
- 4♀︎ Venus08:36 – 09:35
- 5☿︎ Mercury09:35 – 10:34
- 6☽︎ Moon10:34 – 11:33
- 7♄︎ Saturn11:33 – 12:33
- 8♃︎ Jupiter12:33 – 13:32
- 9♂︎ Mars13:32 – 14:31
- 10☉︎ Sun14:31 – 15:31
- 11♀︎ Venus15:31 – 16:30
- 12☿︎ Mercury16:30 – 17:29
Night
- 1☽︎ Moon17:29 – 18:30
- 2♄︎ Saturn18:30 – 19:31
- 3♃︎ Jupiter19:31 – 20:31
- 4♂︎ Mars20:31 – 21:32
- 5☉︎ Sun21:32 – 22:33
- 6♀︎ Venus22:33 – 23:33
- 7☿︎ Mercury23:33 – 00:34
- 8☽︎ Moon00:34 – 01:35
- 9♄︎ Saturn01:35 – 02:35
- 10♃︎ Jupiter02:35 – 03:36
- 11♂︎ Mars03:36 – 04:37
- 12☉︎ Sun04:37 – 05:37
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Questions
How are the planetary hours calculated in Surabaya?
On Thursday, 13 August 2026, the Sun rises at 05:38 and sets at 17:29: the day lasts 11h 52m, that is twelve day hours of 59 min. The night, until the next sunrise at 05:37, lasts 12h 08m: twelve night hours of 1h 01m.
Which planet rules the first hour that day?
Jupiter, from 05:38 to 06:37: 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.