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, 28 August 2026: day of Venus
- Sunrise
- 05:32
- Sunset
- 17:28
- Next sunrise
- 05:31
A day hour lasts 1h 00m; a night hour, 1h 00m. Local time (Asia/Jakarta).
Day
- 1♀︎ Venus05:32 – 06:31
- 2☿︎ Mercury06:31 – 07:31
- 3☽︎ Moon07:31 – 08:31
- 4♄︎ Saturn08:31 – 09:30
- 5♃︎ Jupiter09:30 – 10:30
- 6♂︎ Mars10:30 – 11:30
- 7☉︎ Sun11:30 – 12:30
- 8♀︎ Venus12:30 – 13:29
- 9☿︎ Mercury13:29 – 14:29
- 10☽︎ Moon14:29 – 15:29
- 11♄︎ Saturn15:29 – 16:28
- 12♃︎ Jupiter16:28 – 17:28
Night
- 1♂︎ Mars17:28 – 18:28
- 2☉︎ Sun18:28 – 19:29
- 3♀︎ Venus19:29 – 20:29
- 4☿︎ Mercury20:29 – 21:29
- 5☽︎ Moon21:29 – 22:29
- 6♄︎ Saturn22:29 – 23:30
- 7♃︎ Jupiter23:30 – 00:30
- 8♂︎ Mars00:30 – 01:30
- 9☉︎ Sun01:30 – 02:30
- 10♀︎ Venus02:30 – 03:31
- 11☿︎ Mercury03:31 – 04:31
- 12☽︎ Moon04:31 – 05:31
Other cities · Indonesia
Questions
How are the planetary hours calculated in Surabaya?
On Friday, 28 August 2026, the Sun rises at 05:32 and sets at 17:28: the day lasts 11h 57m, that is twelve day hours of 1h 00m. The night, until the next sunrise at 05:31, lasts 12h 03m: twelve night hours of 1h 00m.
Which planet rules the first hour that day?
Venus, from 05:32 to 06:31: 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.