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 Sunday, 28 December 2025: day of the Sun
- Sunrise
- 05:14
- Sunset
- 17:46
- Next sunrise
- 05:14
A day hour lasts 1h 03m; a night hour, 57 min. Local time (Asia/Jakarta).
Day
- 1☉︎ Sun05:14 – 06:16
- 2♀︎ Venus06:16 – 07:19
- 3☿︎ Mercury07:19 – 08:22
- 4☽︎ Moon08:22 – 09:25
- 5♄︎ Saturn09:25 – 10:27
- 6♃︎ Jupiter10:27 – 11:30
- 7♂︎ Mars11:30 – 12:33
- 8☉︎ Sun12:33 – 13:35
- 9♀︎ Venus13:35 – 14:38
- 10☿︎ Mercury14:38 – 15:41
- 11☽︎ Moon15:41 – 16:44
- 12♄︎ Saturn16:44 – 17:46
Night
- 1♃︎ Jupiter17:46 – 18:44
- 2♂︎ Mars18:44 – 19:41
- 3☉︎ Sun19:41 – 20:38
- 4♀︎ Venus20:38 – 21:36
- 5☿︎ Mercury21:36 – 22:33
- 6☽︎ Moon22:33 – 23:30
- 7♄︎ Saturn23:30 – 00:28
- 8♃︎ Jupiter00:28 – 01:25
- 9♂︎ Mars01:25 – 02:22
- 10☉︎ Sun02:22 – 03:20
- 11♀︎ Venus03:20 – 04:17
- 12☿︎ Mercury04:17 – 05:14
Other cities · Indonesia
Questions
How are the planetary hours calculated in Surabaya?
On Sunday, 28 December 2025, the Sun rises at 05:14 and sets at 17:46: the day lasts 12h 33m, that is twelve day hours of 1h 03m. The night, until the next sunrise at 05:14, lasts 11h 28m: twelve night hours of 57 min.
Which planet rules the first hour that day?
The Sun, from 05:14 to 06:16: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Venus, Mercury, the Moon, Saturn, Jupiter, Mars, then the Sun 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.