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 Tuesday, 15 December 2026: day of Mars
- Sunrise
- 05:07
- Sunset
- 17:40
- Next sunrise
- 05:08
A day hour lasts 1h 03m; a night hour, 57 min. Local time (Asia/Jakarta).
Day
- 1♂︎ Mars05:07 – 06:10
- 2☉︎ Sun06:10 – 07:13
- 3♀︎ Venus07:13 – 08:15
- 4☿︎ Mercury08:15 – 09:18
- 5☽︎ Moon09:18 – 10:21
- 6♄︎ Saturn10:21 – 11:23
- 7♃︎ Jupiter11:23 – 12:26
- 8♂︎ Mars12:26 – 13:29
- 9☉︎ Sun13:29 – 14:32
- 10♀︎ Venus14:32 – 15:34
- 11☿︎ Mercury15:34 – 16:37
- 12☽︎ Moon16:37 – 17:40
Night
- 1♄︎ Saturn17:40 – 18:37
- 2♃︎ Jupiter18:37 – 19:34
- 3♂︎ Mars19:34 – 20:32
- 4☉︎ Sun20:32 – 21:29
- 5♀︎ Venus21:29 – 22:26
- 6☿︎ Mercury22:26 – 23:24
- 7☽︎ Moon23:24 – 00:21
- 8♄︎ Saturn00:21 – 01:18
- 9♃︎ Jupiter01:18 – 02:16
- 10♂︎ Mars02:16 – 03:13
- 11☉︎ Sun03:13 – 04:10
- 12♀︎ Venus04:10 – 05:08
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Questions
How are the planetary hours calculated in Surabaya?
On Tuesday, 15 December 2026, the Sun rises at 05:07 and sets at 17:40: the day lasts 12h 33m, that is twelve day hours of 1h 03m. The night, until the next sunrise at 05:08, lasts 11h 28m: twelve night hours of 57 min.
Which planet rules the first hour that day?
Mars, from 05:07 to 06:10: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars 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.