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 Friday, 21 August 2026: day of Venus
- Sunrise
- 05:35
- Sunset
- 17:29
- Next sunrise
- 05:34
A day hour lasts 1h 00m; a night hour, 1h 00m. Local time (Asia/Jakarta).
Day
- 1♀︎ Venus05:35 – 06:34
- 2☿︎ Mercury06:34 – 07:34
- 3☽︎ Moon07:34 – 08:33
- 4♄︎ Saturn08:33 – 09:33
- 5♃︎ Jupiter09:33 – 10:32
- 6♂︎ Mars10:32 – 11:32
- 7☉︎ Sun11:32 – 12:31
- 8♀︎ Venus12:31 – 13:31
- 9☿︎ Mercury13:31 – 14:30
- 10☽︎ Moon14:30 – 15:30
- 11♄︎ Saturn15:30 – 16:29
- 12♃︎ Jupiter16:29 – 17:29
Night
- 1♂︎ Mars17:29 – 18:29
- 2☉︎ Sun18:29 – 19:30
- 3♀︎ Venus19:30 – 20:30
- 4☿︎ Mercury20:30 – 21:31
- 5☽︎ Moon21:31 – 22:31
- 6♄︎ Saturn22:31 – 23:32
- 7♃︎ Jupiter23:32 – 00:32
- 8♂︎ Mars00:32 – 01:32
- 9☉︎ Sun01:32 – 02:33
- 10♀︎ Venus02:33 – 03:33
- 11☿︎ Mercury03:33 – 04:34
- 12☽︎ Moon04:34 – 05:34
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Questions
How are the planetary hours calculated in Surabaya?
On Friday, 21 August 2026, the Sun rises at 05:35 and sets at 17:29: the day lasts 11h 54m, that is twelve day hours of 1h 00m. The night, until the next sunrise at 05:34, lasts 12h 05m: twelve night hours of 1h 00m.
Which planet rules the first hour that day?
Venus, from 05:35 to 06:34: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mercury, the Moon, Saturn, Jupiter, Mars, the Sun, then Venus 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.