Drekkana (D3): the 3-fold siblings and courage chart explained, computed and read with classical citation
The Drekkana, written as D3 in modern notation, is the siblings chart in Parashari Vedic astrology. It is also read for courage, short-term events and the texture of the chart's 3rd house themes. This piece walks through what the Drekkana is, how to compute it, what classical sources from Brihat Parashara Hora Shastra Chapter 6 actually say about it, and where its predictive register stops.
The Drekkana or D3 is the 3-fold harmonic division of the Vedic birth chart, used as the dedicated siblings and courage chart in Parashari astrology. The three arcs of any sign always fall within the same elemental trine.
- Each 30-degree natal sign is divided into three arcs of 10 degrees.
- 1st arc of any sign is the sign itself; 2nd is the 5th from itself; 3rd is the 9th from itself.
- All three Drekkanas of any sign fall in the same elemental trine (fire, earth, air, water).
- Read for siblings, courage, short-term initiative and 3rd house themes.
- Mars is the primary karaka for siblings in the Drekkana reading.
What the Drekkana actually is
The Drekkana, from the Sanskrit dri (three) related to the Greek dekanos (decan), is the chart produced by dividing each sign of the natal Vedic chart into three equal arcs. The chart is dedicated to the siblings, courage and short-term events axis of the natal reading. Where the natal D1 3rd house indicates the surface texture of these themes, the D3 indicates the deeper structural texture.
The Drekkana is one of sixteen standard divisional charts in Parashari astrology. Each varga has a topical focus: the D9 Navamsa for marriage, the D10 Dasamsa for career, the D7 Saptamsa for children, the D12 Dwadasamsa for parents. The D3 is the dedicated siblings chart. The D3 also shares lineage with the Western decan system (which divides each sign into three parts of 10 degrees each), although the destination-sign assignment differs between the two traditions.
The 3-fold division
A sign in the Vedic zodiac is 30 degrees wide. The 3-fold division produces three equal arcs of 10 degrees each. Arc 1 spans 0 to 10 degrees within the sign; arc 2 spans 10 to 20 degrees; arc 3 spans 20 to 30 degrees. A planet's natal degree determines which arc it occupies.
The destination sign rule: elemental trine
The Parashari rule for the Drekkana destination signs produces the elemental-trine property:
- The 1st Drekkana of any sign is the sign itself.
- The 2nd Drekkana is the 5th sign counted from the natal sign.
- The 3rd Drekkana is the 9th sign counted from the natal sign.
Because the 5th and 9th signs from any sign are in the same elemental trine, all three Drekkanas of any natal sign share the same element. The pattern for all twelve signs:
| Natal sign | Element | 1st Drekkana | 2nd Drekkana (5th) | 3rd Drekkana (9th) |
|---|---|---|---|---|
| Aries | Fire | Aries | Leo | Sagittarius |
| Taurus | Earth | Taurus | Virgo | Capricorn |
| Gemini | Air | Gemini | Libra | Aquarius |
| Cancer | Water | Cancer | Scorpio | Pisces |
| Leo | Fire | Leo | Sagittarius | Aries |
| Virgo | Earth | Virgo | Capricorn | Taurus |
| Libra | Air | Libra | Aquarius | Gemini |
| Scorpio | Water | Scorpio | Pisces | Cancer |
| Sagittarius | Fire | Sagittarius | Aries | Leo |
| Capricorn | Earth | Capricorn | Taurus | Virgo |
| Aquarius | Air | Aquarius | Gemini | Libra |
| Pisces | Water | Pisces | Cancer | Scorpio |
Classical citations
Worked example
Take Mars at Cancer 16 degrees 20 minutes. 16 degrees 20 minutes falls in arc 2 (between 10 and 20). The 2nd Drekkana of Cancer is the 5th sign from Cancer, which is Scorpio. Mars is therefore in Scorpio Drekkana. Scorpio is Mars's own sign, so this Mars is in own sign in the D3 (Scorpio), even though it is in Cancer (its sign of debilitation) in the D1. The D3 placement provides significant neechabhanga (cancellation of debilitation) for sibling-related themes; the surface Mars looks debilitated, but the deeper sibling-axis reading is structurally favourable.
What the Drekkana predicts
Siblings
The Drekkana 3rd house (counted from the Drekkana lagna), the 3rd lord placement in the Drekkana, the planets aspecting the Drekkana 3rd, and Mars's position in the Drekkana together describe the texture of the sibling-relationship. The classical reading uses these to assess the number of siblings, their character, the dharmic alignment of sibling-relationships, and the supportive-or-conflicted register of the sibling axis.
Courage and initiative
The same configuration that describes siblings also describes the native's own courage and hands-on initiative. The 3rd house axis covers self-driven action, willingness to start things, and the texture of short-term decisive engagement. The Drekkana provides deeper-resolution reading for the courage register.
Short-term events
The 3rd house themes also extend to short journeys, day-to-day decisive action, and short-cycle events. The Drekkana is read alongside the D1 3rd house and the active Vimshottari period for short-term life events that involve initiative, hands-on engagement, or short-distance travel.
What the Drekkana does NOT predict
Three boundary conditions. First, the chart does not predict timing of sibling-related events; timing comes from the Vimshottari dasha and transits. Second, it is birth-time sensitive: each 10-degree arc corresponds to roughly 40 minutes of clock time at the ascendant, so birth-time errors above 40 minutes can change the Drekkana lagna. Third, the chart is structural rather than deterministic; specific sibling outcomes depend on the siblings' own charts and the broader life context.
References
- Brihat Parashara Hora Shastra, Chapter 6 (Drekkano sahaja-vichara). Sage Parashara.
- Phaladeepika, Chapter 8 (Drekkane balavan Mangalah). Mantreshwar, 13th century.
- Saravali (Drekkana-bala paurusha-vichara). Kalyana Varma, circa 8th century.
- Internal: Rashi (D1): the Vedic natal chart
- Internal: Dasamsa (D10): the career chart
- Internal: Navamsa (D9)
Frequently asked questions
What is the Drekkana or D3 chart in Vedic astrology?
The Drekkana, written as D3 in modern notation, is the 3-fold harmonic division of the Vedic birth chart used in Parashari Vedic astrology for the reading of siblings, courage and short-term events. Each of the twelve 30-degree signs in the natal chart is divided into three equal arcs of 10 degrees each, and each arc is assigned to a sign of the zodiac following the classical rule that the first arc maps to the sign itself, the second arc maps to the 5th sign from itself, and the third arc maps to the 9th sign from itself. The three destinations always fall within the same elemental trine (fire signs trine to fire, earth to earth, and so on). The Drekkana is read primarily for the 3rd house themes of the natal chart: siblings, courage, hands-on skill, short journeys, communication and initiative.
How is the Drekkana computed?
Each 30-degree sign is divided into three equal arcs of 10 degrees each. The first arc (0 to 10 degrees) maps to the same sign as the natal sign. The second arc (10 to 20 degrees) maps to the 5th sign counted from the natal sign. The third arc (20 to 30 degrees) maps to the 9th sign counted from the natal sign. So for Aries the three Drekkanas are Aries, Leo and Sagittarius (all fire signs); for Taurus they are Taurus, Virgo and Capricorn (all earth signs); for Gemini they are Gemini, Libra and Aquarius (all air signs); for Cancer they are Cancer, Scorpio and Pisces (all water signs). The pattern repeats: the three destinations for any sign form the elemental trine of that sign. A planet at Aries 14 degrees occupies the 2nd Drekkana of Aries (between 10 and 20 degrees), which is Leo.
What does the Drekkana chart actually predict?
The Drekkana is read for three things. First, siblings: the 3rd house of the Drekkana counted from the Drekkana lagna, the 3rd lord placement, and Mars's position in the Drekkana describe the sibling-relationship texture, the number and character of siblings, and the dharmic alignment of sibling-relationships. Second, courage and initiative: the 3rd house in general Vedic reading covers courage, hands-on skill, and short-term decisive action; the Drekkana adds deeper texture to these significations. Third, short-term events and travel: 3rd house themes include short journeys, day-to-day initiative, and short-cycle events; the Drekkana provides the deeper-resolution reading for these. The Drekkana does not predict timing; timing comes from the Vimshottari dasha system combined with transit triggers.
Why do the three Drekkanas always fall within the same elemental trine?
Because the rule (1st arc same sign, 2nd arc 5th from itself, 3rd arc 9th from itself) produces the trinal cycle by construction. The 5th sign from any sign and the 9th sign from any sign are both in the same elemental trine as the original sign. Aries to Leo to Sagittarius is a fire trine. Taurus to Virgo to Capricorn is an earth trine. Gemini to Libra to Aquarius is an air trine. Cancer to Scorpio to Pisces is a water trine. The three Drekkanas therefore always preserve the natal sign's elemental quality, which is one of the structurally elegant properties of the D3 system. A planet in any natal sign retains its elemental tone across the Drekkana, with the three sub-arcs distinguishing within the same element.
How is the Drekkana different from the natal 3rd house for siblings reading?
The natal D1 3rd house is the primary indicator of siblings, courage and short-term events. The Drekkana adds deeper-resolution texture to the same significations. The D1 tells you the surface texture of the 3rd house themes; the D3 tells you the deeper-resolution structure. A complete siblings reading uses both. The classical sequence is to check the D1 3rd house, 3rd lord and Mars (karaka for siblings) for the surface picture, then check the corresponding Drekkana 3rd house and Mars's Drekkana placement for the deeper-resolution texture, then cross-validate with the active Vimshottari period for any sibling-event timing.
What are the limits of the Drekkana chart?
The Drekkana has four explicit limits. First, it does not predict timing on its own; sibling-event timing comes from the Vimshottari dasha system combined with transit triggers to the natal 3rd house and Mars. Second, it is birth-time sensitive because each 10-degree arc corresponds to approximately 40 minutes of clock time at the ascendant in temperate latitudes; a birth-time error of 40 minutes can shift the Drekkana lagna by one arc and change the reading. Third, the chart describes the structural texture of 3rd house themes (siblings, courage, short-term events), not specific sibling-related events; particular outcomes depend on the siblings' own charts, the native's circumstances, and the dasha-transit timing. Fourth, the Drekkana is one of sixteen divisional charts; a complete siblings reading also checks the natal D1 3rd house, the D9 Navamsa for the 3rd lord's general strength, and the active Vimshottari period.
Read next
This article is a source-grade reference on the Drekkana (D3) divisional chart used in Parashari Vedic astrology for siblings, courage and short-term events. Classical citations are drawn from Brihat Parashara Hora Shastra (Chapter 6), Phaladeepika (Mantreshwar, 13th century), and Saravali (Kalyana Varma, circa 8th century). Computation rules and reading methodology are documented in the cited classical sources. This research is published for informational and educational purposes only. No commercial, financial, medical, legal or professional decisions should be taken solely on the contents of this article. Internal audit log maintained.