A Journal of Inner Work and Therapeutic Arts
Immanence and Identity in Plural Personality

Studies Index...

Radix and Duad:  Liminality and Wayfinding.

13-19 November 2013

Work with the radix (natal chart) yields useful information regarding one's "inner life", but interpreta-
tive syntheses generally focus on patterns and dynamics leading to a manifestation or actualization in the outer world — descriptors, aspect patterns and interactions suggest this condition and circum-
stance, that event or result.

The dwad/duad chart represents a complementary approach that can be applied to gain insight on factors which underlie and inwardly bear upon all of that — factors which help us understand the "why", the essence and constellations, motivations, drives and cathexes at root and core of what is manifesting or being actualized.

In the illustration at right, radix positions including selected asteroids, Arabic Parts, fixed stars and axes are shown in the outer circle; the duad chart and aspects are shown in the inner circle.

Use of terms

The terms "dwad" (Skt. dwadasamsa, dwadachamsha 1/12th division of a sign; amsha "portion") and "duad" (Gk. dodecatemorion, 1/12th part, dodeka "twelve", from duo "two", + deka "ten"; duas, duad-; duo L.) both deal with smaller division of sign real estate in an effort to place in context and thus better define the implications of a planet in the horoscope.  Hindu astrologers developed this approach. Influenced by the Egyptians to some extent, Greek astrologers worked with it too, though they assigned each part to a planet on the basis of different rules, by degrees or even half-degrees, applied them to cardinal points and more, with variable interpretations of meaning in the horoscope.1

Though the terms are sometimes used interchangeably, or one to the exclusion of the other,
it's convenient to use both as follows:

In the dwad system, each 30°-sign of the zodiac has an inner cycle of 12 dwads, 2°30' each; in any given sign's sequence, the name of the first dwad is the name of the sign itself, so, e.g., the first dwad in Cancer is Cancer, the second is Leo, etc.

The dwad system reveals subtypes of zodiacal signs and allows sharper delineation of characteristics, of what is being worked on; it is additionally useful in chart rectification using the dwad of the ascendant, studies of relationship, compatibility and unconscious influences, attractions, and so on.2a

Dwad-charts are thought to become stronger with age, as inner processes are clarified and less constrained, as we open to new perspectives and creative capacities, particularly as we become more inwardly oriented.2b

The duad system described by Alice Portman converts the locus of a chart factor within a dwad to its corresponding locus in the full zodiac. A dwad table is helpful for this, and the calculation is fairly simple.3,4, 5 This approach seems to me far more rewarding than the simple dwad, which, though equipt with more options than the system of decans, for example, is equally lacking in depth and complexity.


The patterns revealed in the combination chart above present many layers of activity.
Five selected dynamics include a

  1. foundational kite with apex at ⚵ and Anti-Galactic Center, ⚸ ⚶ GC at base;
  2. T-square and two grand squares, engaging ♇ ♄ ☿, ☉, ♃, and all axes but the GC;
  3. mystic rectangle including ♇ and the Part of Identity;
  4. YOD and YOD kite focused on ♃ and Hephaestus, respectively; and
  5. Star of David, with core trines focused on
    Persephone - (IC ☋ AMUN) - (♆ ⊕), and (MC ☊) - OSIRIS - (☿ ♄).

Let's begin with ♃, which we find atop the YOD formed with OSIRIS (resurrected, dismembered-remembered, multiplicity-singularity, individuality, judgment; Ruler of the Underworld) and AMUN (immanent in the neteru, universal, origin, source).

At the 12th-house crux of a T-square affecting the 3rd and 9th, ♃ experiences a complex ideational conflict aligning identity with the personal versus transpersonal, and this is purposive, given its position at midpoint between 1st-house ☊ and 11th-house ♆ in Pisces. The challenge is to develop an enlightened understanding and capacity to evolve in response to the conflict.

The creative thrust goes to 5th-house OSIRIS, from the ♆ ⊕ kite apex; partnership focus and what there is to do, from a personal point of view (MC ☊ in the 1st), goes to AMUN (IC ☋), the place of greatest intimacy and vulnerability, the roots of personality and archetypal reality.

The mystic rectangle engages the 1st, 3rd, 7th and 9th houses. It involves the Part of Identity, ⚷ ♅ Poseidon, Sirius, and ♇, going to identity and expression, partnership, and psychophilosophic understanding.

In the same sense the ♃ YOD has been described as purposive, the YOD kite might be described as directive → with ☽ at apex in the 6th, flanked by AMUN and ♇, the Hephaestus focus takes on special significance as the work-through point in the 2nd, dealing with personal values and resources. Dis Pater... god of riches, fertile agricultural land, and underground mineral wealth.7

Next we come to the Star of David, with its two core trines and six rectangles — the six junctions including
(MC ☊) - (♆ ⊕) - (♄ ☿) - (IC ☋ AMUN) - OSIRIS - Persephone.  That effectively encompasses and integrates the program.


Of interest at this point are the connections between the duadic and radical. Note, for example, that the duadic Vx, AC, MC and ☊ all fall within Taurus, and correlate respectively with PTAH Hephaestus, Lilith, and the ☉ ☿ ☽ stellium in the 10th house — 1st- and 12th-house duadic go to 10th-house radical.

The MC tops a kite formation here, dealing with calling, focused on (IC ☋) AMUN, engaged in the duadic grand square involving the nodes, and AMUN shifts the flow through the Star of David, engaging the radix at all of the other five angles. AMUN is conjunct Kornephoros, which holds position in both duadic and radical, in the first degree of Sagittarius, heralding beginnings subject to change.

A 2.8 Magnitude pale yellow star in the right shoulder of the Kneeling Man, β Hercules, Kornephoros (from the Greek Korunephoros, often applied to the entire figure) is likened to Mercury by Ptolemy, and thought to represent tenacity and fixity of purpose, strength of character, an ardent nature and dangerous passions; associated with the Emperor (IV) in Tarot, and by Kabalists with the Hebrew letter ℸ8daleth ("door", based on a hieroglyph depicting a door) is the fourth letter in many Semitic alphabets (e.g., Phoenician, Aramaic, Hebrew, Syriac, Arabic)9 → the Phoenician dāleth gives rise to the Greek delta Δ,10 associated with change or uncertainty, heat, the defendant, delta particles, the Greek inventor and architect Daedalus, and more.11

Along the same lines, the Emperor represents the discovery of principles, the defining of laws, the mapping of domains, understanding forms and structure — all going to inventing, building, establishing, and fostering.12

Sun is the Atmakaraka (atma- "soul" + karaka- "significator") in Jaimini sidereal astrology, but the personal significator, the Chara Atmakaraka (chara- "moveable") is the planet of highest longitude in any sign.

  • In my case, in sayana, that's also ☉ : 25ºTaurus10'22".
    [Sidereal: ♂ = 29°Leo51'14.51"]
    Sun is in the Pisces dwad of Pisces, conjunct radical ♃ + Deneb Adige in the Aries dwad of Pisces → ♃ YOD in Aries.

Amatyakaraka (career) is the planet of second highest longitude.

  • In sayana, that's ♂ = 23ºVirgo0'10".
    [Sidereal: ☿ = 29°Aries06'05.44"]
    Duadic ♂ is conjunct the duadic Part of Identity and engaged in the mystic rectangle, whilst duadic OSIRIS (5th) is conjunct radical ♂ (2nd) and ☋ (3rd).
    The creative drive is informed by the Osiris theme.

Neptune is apex of the core kite formation in the radix, opposite ♀ in Aries, flanked by ♇ in Leo and the ⚷ Sagittarius complement.
The duadic chart provides new perspective on the importance of ♆, closely tied to the Pisces ⊕, pointing to 5thH OSIRIS.
But there's much more; e.g., the vertical axis of the functional kite has apical Galactic Anti-Center (GAC) ⚵ opposing focal GC ⚸ ⚶, which conjuncts radical ♆ in the 3rd.
Artists, poets, film makers, mystics...


  1. Ancient Astrology. Tamsyn Barton. Routledge (1994:96ff;passim)
  2. A. Horoscope signs within signs ― DWADS. Preserved by the Internet Archive, WayBackMachine (2 April 2003).
    B. The Dwad-Chart. Neptunia 2003, Anyara-Astrology 2003.
  3. Calculating Duad and Dwad charts. Alice Portman. Includes a free but imperfect duads program. More articles/studies: The Duad System.
  4. Calculating Dwad Charts ― The Basics. EH Cazimi.
  5. Allen Edwall's free AstroWin erects a Duad chart with aspects, also useful (though my calculations were in some cases at slight variance).
  6. Dwad-Amsha = 144 Portions. Barbara Pijan Lama Jyotisha
  7. Dis. NovaRoma.
  8. Kornephoros. Constellations of Words.
  9. Semitic Languages. Phoenician International Research Center.
  10. Daedelus.
  11. Delta.
  12. Emperor. Mary K. Greer. Tarot Constellations. 1987:78. PDF of 1987 book, now OOP.