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Lord of the Turn Calculator

Calculate the Lord of the Turn, profection and Lord of the Year based on Abu Ma'shar's technique.

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Lord of the Turn
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Lord of the Turn
Lord of the Year (Profection)
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Profected Sign
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Profection House
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☽ All Years Table
Great Turn
Turning of the Soul
Great Year
Both
Current Age
Age Year Lord of the Turn Profected Sign House Lord of the Year Special
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♃ Planets and Their Rulerships
MarsAries ♈ & Scorpio ♏
VenusTaurus ♉ & Libra ♎
MercuryGemini ♊ & Virgo ♍
MoonCancer ♋
SunLeo ♌
JupiterSagittarius ♐ & Pisces ♓
SaturnCapricorn ♑ & Aquarius ♒

Chaldean Order (7 Planet Cycle)

Saturn ☤ → Jupiter ♃ → Mars ♂ → Sun ☉ → Venus ♀ → Mercury ☿ → Moon ☽ → (Saturn again...)

What is the Lord of the Turn?

The Lord of the Turn (Latin: Dominus Triplicitatis, Arabic: Sahib al-Tahwil) is one of the annual prediction techniques developed by Abu Ma'shar al-Balkhi (787-886). This method assigns a ruling planet for each year based on the planetary hour at the moment of birth.

Calculation Method

In your birth year (age 0), the Lord of the Turn is your birth hour planet. Each subsequent year, the next planet in the Chaldean order becomes the Lord of the Turn. This sequence descends from Saturn to the Moon and then returns to Saturn. Thus, a complete cycle is completed every 7 years.

Profection (Lord of the Year)

In the profection technique, each year advances one sign starting from the rising sign. A cycle is completed every 12 years. The traditional ruler of that year's profected sign is called the Lord of the Year.

Special Years

Chaldean Order

The Chaldean order is a system in which the planets were arranged according to their distance from Earth in antiquity: Saturn (farthest), Jupiter, Mars, Sun, Venus, Mercury, Moon (nearest). This sequence also forms the basis of the planetary hours and planetary days system.

Frequently Asked Questions

About solar and lunar return charts and the Lord of the Year

What is a solar return chart and what does it show?

A solar return is the chart cast for the exact moment in a given year when the transiting Sun returns to the precise zodiacal position it occupied at birth - a few hours before or after the conventional birthday, depending on the year. The classical authors, including Mashallah, Abu Maʿshar and the later European tradition, considered the solar return the most important annual chart, used to time the events forecast by the natal nativity within a particular year. Modern practice often combines the solar return with annual profection, transits and progressions to obtain a layered view of the year ahead.

How is the Lord of the Year determined in a return-chart context?

The Lord of the Year is determined first from the natal chart by annual profection: the Ascendant advances one whole sign per year of life, and the ruler of the profected sign becomes the principal time-lord for the coming twelve months. The same planet is then traced into the solar return chart to see which house and condition it occupies, providing the bridge between the natal indications and the year's specific events. Persian and Arabic sources such as Abu Maʿshar treat the harmonious or stressful placement of the Lord of the Year in the solar return as the single most decisive factor for predicting the year.

What is a lunar return chart and how often does it occur?

A lunar return is the chart cast for the exact moment in a given month when the transiting Moon returns to the position it occupied at birth, which happens approximately every 27.3 days (the sidereal month). It functions as a monthly extension of the solar return, narrowing the year's themes to specific four-week periods and giving fine-grained predictive resolution for emotional, physical and household matters. Persian astrologers used lunar returns as the primary monthly tool, and contemporary traditional astrologers including John Frawley and Lee Lehman have revived their systematic use.

How does a return chart differ from the natal profection in predictive value?

Annual profection works directly from the natal chart and tells us which planet is the principal time-lord and which house is activated this year, providing the thematic framework. The solar return chart, by contrast, is a fresh chart whose own angles, planetary placements and aspects describe how those themes will manifest in the actual year. The two are complementary: profection without the return is too general to time specific events, while the return without profection lacks the natal anchor that tells us which of its many possible meanings will actually unfold.

Should a solar return be cast for the natal location or the current location?

This is one of the most debated points in return-chart astrology. The classical tradition (Mashallah, Abu Maʿshar, Ibn Ezra, Bonatti) generally cast the return for the place where the native is physically located at the moment of the return, on the principle that the chart describes events happening to the native there and then. A more recent tradition, popularized by Alexandre Volguine, casts the return for the natal location to preserve continuity with the nativity. A pragmatic modern approach is to cast both and compare; if the native travels deliberately to a chosen location for the return, that location can also be intentionally elected to optimize the angles of the return chart.