What are planetary years?

Planetary years are the symbolic lifespan values that traditional astrology assigns to each planet, used to measure how long a ruling lord governs and how many years the alcocoden grants a native. They anchor the oldest arithmetic of timing in the classical art.

How are the granted years calculated?

The method finds the hyleg, then takes the ruler of that planet's sign as the alcocoden, the giver of years. The alcocoden's table value becomes the base, and its condition decides the rest: an angular, dignified lord keeps its full span, while a retrograde or fallen one has its years cut, classically halved.

Do planetary years predict how long someone lives?

Historically the reckoning was used for length of life, but this is treated as the most delicate and unreliable use of the technique, and most modern practitioners avoid literal lifespan claims. The year values serve far better as a clock that paces the time-lord seasons than as a fixed expiry date.

Why do the year numbers differ between books?

Because different classical authorities assigned each planet somewhat different spans, the surviving tables are not uniform, so Ptolemy and Dorotheus and the later Persian-Arab writers do not fully agree. A practitioner must state which table they use before the numbers carry meaning.

How do I find my planetary years?

Locate the hyleg and its sign's lord, then read that lord's traditional year value and adjust it by its strength. The alcocoden-calculator draws your giver of years and the classical span it grants, applying the angularity and halving rules for you.

Planetary Years: The Classical Years a Lord Grants

Key takeaways

Each classical planet carries a symbolic span of years.
The alcocoden, lord of the hyleg's sign, grants those years.
A strong, angular lord keeps its full span.
A weak, retrograde, or fall lord has its years halved.
The same values time the great period-lord seasons.

Definition

In traditional astrology each planet carries a symbolic number of years, a lifespan value drawn from ancient sources. The Moon and Mercury and the rest each have a set of spans, and the sum or choice among them feeds the classical reckoning of a life's length and of a lord's active season.

The most famous use runs through the alcocoden, the 'giver of years', which is the lord of the sign holding the hyleg. That lord's planetary years become the raw number of years the tradition says the native may live, adjusted up or down by the lord's strength. A strong, angular lord keeps its full span, while a weak one is halved.

The same year values also time the great period-lords, so a Firdaria or profection season is measured against these spans. On our canonical reference chart the exact years granted follow the hyleg and alcocoden that the alcocoden tool computes. The alcocoden and hyleg entries explain the givers these years are credited to.

How it works

The engine first locates the hyleg, the most dignified planet among the five givers of life, then finds the alcocoden, the ruler of the sign that hyleg occupies. That ruler's traditional year value becomes the base lifespan for the nativity.

The tool then weighs the alcocoden's condition to set the final count. An angular, well-dignified lord keeps its full span, while a lord that is retrograde, in fall, or otherwise weakened has its years reduced, classically halved. This arithmetic is where the length-of-life judgment lands.

Beyond the single lifespan, the same planetary years seed the period systems, so each lord's rule is measured in these spans. The alcocoden tool returns your granted years, and the hyleg entry describes the giver whose sign supplies them.

Why it matters

Planetary years matter because they built the oldest quantitative claim in astrology, that a chart could name a length of life. Even readers who set aside literal lifespan still see why the classical art prized this arithmetic above most else.

Its lasting value is as a clock for the time-lords, since the same year values measure how long each Firdaria or profection season runs, giving the predictive period systems their rhythm. Strip out the spans and the great lord-cycles lose their calendar.

It also sits at the heart of the dignity system, because a lord's strength directly changes the years it grants. The alcocoden tool computes your span, and the sect and domicile entries show what makes a lord strong enough to keep it whole.

Common misconceptions

Planetary years predict an exact death date.

The classical year spans give a symbolic range, not a fixed expiry, and even the medieval masters treated a hard length-of-life judgment as the most delicate and fallible use of the art. The numbers describe a season of vitality, and the same values serve timing far more often than any literal end.

Every source agrees on the same year values.

Different authorities, from Ptolemy to Dorotheus to the Persian and Arabic writers, hand each planet somewhat different spans, so the tables vary across the tradition. A practitioner must name which set of years they use, because two schools can credit the same lord with different totals.

The years come only from the planet itself.

The granted count depends on the lord's condition, since an angular, dignified planet keeps its full span while a retrograde or fallen one is cut, classically halved. So the raw table value is only a starting point that the chart's dignity system then edits.

Planetary years belong only to lifespan.

The same spans also measure the rule of the period-lords in systems like Firdaria and the great directions, so they act as a general clock rather than a single morbid tally. Their everyday predictive use is timing seasons, not just counting to an end.

A note from the practitioner

I treat planetary years as the classical clock behind the time-lords far more often than as a lifespan claim, since the same spans set the length of each Firdaria season and give the period systems their measured feel. When I do read the alcocoden's grant, I weigh the lord's angularity and dignity first, because a weakened ruler simply cannot carry its full number.

What I keep honest is that a literal length-of-life prediction is the least defensible use I know, and I never frame these years as a death date. I let the alcocoden tool establish the base value and its halving rather than hand-counting from a table, since the lord's condition decides the final figure.

The bottom line

There is something austere and beautiful about planetary years, the ancient conviction that time itself could be metered out in dignified spans owed to a ruling star. It is astrology as arithmetic of a life. I would honor the idea mainly as the clock that paces the great lord-seasons, while letting its grimmer literal promise rest, since the timing is where its real craft lives.
— Elena Marchetti, Founder & Staff Astrologer

Limitations & honesty

Deriving planetary years is exact within the method, since the engine locates the hyleg and alcocoden from real ephemeris positions and essential-dignity tables and applies the traditional halving rules to a named table of year values (astronomy-engine), so a reported span follows set arithmetic. But crediting those years to a planet as a life's length is ancient symbolism rather than an empirically validated claim. Treat planetary-years readings as reflective framing for entertainment.

Terms defined

Alcocoden: The lord that grants the years.
Hyleg: The giver of life whose sign sets the lord.
Year value: A planet's traditional span.
Halving: Cutting a weak lord's years.

Questions people ask

What are planetary years?: Planetary years are the symbolic lifespan values that traditional astrology assigns to each planet, used to measure how long a ruling lord governs and how many years the alcocoden grants a native. They anchor the oldest arithmetic of timing in the classical art.
How are the granted years calculated?: The method finds the hyleg, then takes the ruler of that planet's sign as the alcocoden, the giver of years. The alcocoden's table value becomes the base, and its condition decides the rest: an angular, dignified lord keeps its full span, while a retrograde or fallen one has its years cut, classically halved.
Do planetary years predict how long someone lives?: Historically the reckoning was used for length of life, but this is treated as the most delicate and unreliable use of the technique, and most modern practitioners avoid literal lifespan claims. The year values serve far better as a clock that paces the time-lord seasons than as a fixed expiry date.
Why do the year numbers differ between books?: Because different classical authorities assigned each planet somewhat different spans, the surviving tables are not uniform, so Ptolemy and Dorotheus and the later Persian-Arab writers do not fully agree. A practitioner must state which table they use before the numbers carry meaning.
How do I find my planetary years?: Locate the hyleg and its sign's lord, then read that lord's traditional year value and adjust it by its strength. The alcocoden-calculator draws your giver of years and the classical span it grants, applying the angularity and halving rules for you.

Related terms

Alcocoden Hyleg Firdaria

Try it on your own chart

Alcocoden Calculator Hyleg Calculator Primary Directions Calculator

Written by

Elena Marchetti

Founder & Staff Astrologer

Methodology reviewed by

Dr. Amara Osei

Astronomy Reviewer

Method: The engine locates the hyleg and the alcocoden from real ephemeris positions and the essential-dignity tables, then applies the traditional angularity and halving rules to a named classical table of planetary year values (astronomy-engine), so a reported span is exact arithmetic within the method even though crediting those years to a planet as a life's measure is ancient, contested symbolism. · Published 2026-10-04 · Updated 2026-10-04 · Calculated with sub-arcsecond astronomy (VSOP87/ELP via astronomy-engine)