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How Many Retrograde Planets Are in a Birth Chart? The Full Distribution for Everyone Born 1980–2009

· KLifeMap.AI

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Open a birth chart and you may see a small R next to several planets. How many is usual? We counted Mercury, Venus, Mars, Jupiter, Saturn, Uranus and Neptune on every day from 1980 to 2009, 10,958 days, at noon UTC.

The distribution

Retrograde planetsShare of days, 1980–2009
018.1%
124.7%
223.0%
321.8%
49.3%
52.9%
60.2% (27 days)
7never

There is no single "normal" number. Zero, one, two and three retrograde planets are all common: each covers roughly a fifth to a quarter of birthdays. Four is less common (about one in eleven), and five or more is about one in thirty.

Which planets do it most

PlanetShare of days retrograde, 1980–2009
Neptune43.9%
Uranus42.1%
Saturn36.4%
Jupiter30.9%
Mercury19.1%
Mars9.5%
Venus7.3%

The farther a planet is from the Sun, the more of the year it spends retrograde. So most of the R's in a chart are Jupiter, Saturn, Uranus and Neptune. They change slowly and are shared by everyone born within weeks of each other.

The six-planet days

Only two stretches in 30 years had six planets retrograde at once, with Mercury, Mars, Jupiter, Saturn, Uranus and Neptune all moving backward:

Dates (UTC)Days
April 30 – May 5, 19846
July 13 – August 2, 198621

Venus was moving forward both times, which is why no day reached seven.

And today?

On October 26, 2026, five planets are retrograde: Mercury, Venus, Saturn, Uranus and Neptune (the November count, day by day). Five or more happened on only about 3% of days between 1980 and 2009.

What the numbers do and don't tell you

Astrology reads natal retrograde planets as qualities turned inward. That is an interpretation, and this count cannot prove or disprove it. The table tells you how common each count is. It is a statistic about a population, not a reading of you: a chart with four R's is not "more" of anything than one with none. Pluto is left out because our engine's Pluto is a smooth approximation that does not reproduce its stations.

How we calculated: planetary positions from the public-domain formulas in our chart engine (Meeus, Astronomical Algorithms, and NASA/JPL low-precision orbital elements). A planet is counted as retrograde when its apparent longitude, seen from Earth, decreases over a day; stations were searched hour by hour. One sample per day at 12:00 UTC; a birth on a station day can differ.

KLifeMap.AI is a self-understanding platform: a rule-based judgment engine grounded in classical Korean BaZi decides first, and AI only explains the result afterward.

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