The Drekkana (D3) Chart: Reading Siblings, Courage and Initiative

Most people who come across the drekkana have already heard that Vedic astrology divides the birth chart into smaller charts for particular topics, and that one of these, the D3, is "for siblings." That much is true, but it undersells what the chart does and skips a real complication: the word drekkana covers two distinct classical uses that popular writing usually folds into one explanation. One is a varga, built the same way the navamsha or dashamsha are built, used to refine what the 3rd house of the birth chart already says about siblings, courage and self-effort. The other is a set of thirty-six pictorial figures assigned to each ten-degree slice of the zodiac, an older layer of the tradition used historically for physical description and horary judgment. Most casual writing on the drekkana blends the two without saying so.

This piece treats the D3 mainly as a varga, the way a practitioner actually uses it in a modern reading, and treats the iconographic tradition as what it is, a related but separate stream, so the two stop getting confused. If you have not read our piece on the dashamsha (D10), it covers the same construction logic applied to career, and is worth reading alongside this one since the two vargas share a family resemblance in how they are read and where they fail.

How the Drekkana is built

Every sign spans 30 degrees, and the drekkana divides that span into three equal parts of 10 degrees each: 0 to 10, 10 to 20, and 20 to 30. Each part, called a decanate, maps onto one of the twelve signs. In the counting method most widely used, the first decanate maps to the sign itself, the second decanate maps to the 5th sign counted from it, and the third decanate maps to the 9th sign counted from it.

Because the 1st, 5th and 9th signs from any starting point always belong to the same element, fire, earth, air or water, this counting rule has a clean consequence: all three decanates of a sign stay within that sign's own element. Take a planet at 24 degrees Scorpio, a water sign. That falls in the third decanate, 20 to 30 degrees, so the D3 sign is the 9th sign from Scorpio, which is Cancer, itself a water sign. A planet in the second decanate of Scorpio, 10 to 20 degrees, maps to the 5th sign from Scorpio, Pisces, also water. Scorpio's three decanates cycle through Scorpio, Pisces and Cancer, never leaving the element. The same holds for every sign: the drekkana never sends a division outside its own elemental family.

The D3 lagna is built from the ascendant's own degree using this same rule, not from a planet's degree, the way the dashamsha lagna is built from the ascendant rather than from any single graha.

What the D3 legitimately shows

The drekkana is the varga assigned to the 3rd house, so its subject matter follows the 3rd house's own significations: siblings, particularly the drive and the relationship dynamics around them, courage and valor, self-initiated effort as distinct from effort that arrives through others, short journeys, and the hands and shoulders as the parts of the body ruled by that house. Classical usage treats these as one connected theme rather than a list of unrelated topics: courage and self-effort are what a person brings to bear when there is no external support to lean on, and siblings, in the traditional reading of the 3rd house, are the people who share that terrain of effort rather than the people who protect or provide the way the 4th or 9th houses describe.

Read narrowly, the D3 sharpens what the birth chart already indicates about the 3rd house. It can distinguish a courage that shows up as a burst of initiative from one that is closer to persistence under strain. Where the D1 already shows a real sibling relationship to describe, it can say something about whether that relationship tends toward closeness or friction. What it does not do is manufacture a sibling relationship, or a store of courage, where the birth chart's 3rd house shows nothing to begin with. If the D1's 3rd house is unremarkable, an active-looking D3 is refining very little.

The karaka for siblings, and where Jaimini differs

In the Parashari system, Mars is the naisargika karaka, the natural and fixed significator, for siblings, courage and the 3rd house generally, in the same way the Sun stands for the father and Jupiter for children. Mars's own condition in the birth chart, and its placement in the D3, is checked alongside the 3rd house itself rather than treated as a stand-in for it.

Jaimini's system does not assign fixed natural karakas to each relationship the way Parashari does. It instead ranks the seven classical grahas by degree within their signs and assigns roles based on that ranking, chara karakas that shift from chart to chart. The Bhratri Karaka, the planet holding the fourth-highest degree among the seven, is Jaimini's rotating significator for siblings and for courage more broadly. Because the Bhratri Karaka differs from chart to chart, a Jaimini-trained reader is not necessarily looking at the same planet Mars represents in the Parashari approach, and the two frameworks can point to different planets as the one to watch for sibling matters in the same chart. A careful reading holds both: Mars as the constant natural significator, and the Bhratri Karaka as the chart-specific one, neither dropped in favor of the other.

How to read a D3 chart, in order

A working reading of the drekkana moves through a fixed sequence rather than scanning for whatever stands out.

Start with the D3 lagna and its lord, which sets the general tone for how initiative and effort express themselves before anything else is layered in.

Move to the 3rd house of the D3 itself, its sign, its lord, and any planets occupying it directly, the single most concentrated piece of information the chart offers on the sibling and courage themes.

Check Mars, wherever it sits in the D3, since it carries the natural signification of the house regardless of which house it occupies in the birth chart.

Locate the Bhratri Karaka and note its D3 placement as a chart-specific reading layered on top of Mars's constant one, not a replacement for it.

Finally, trace the D1's own 3rd lord into the D3 and see where it lands, which shows how the birth chart's 3rd house promise plays out once magnified.

As with any varga, no single one of these checks is a verdict on its own. A D3 lagna that looks strong, next to a 3rd house that is empty or afflicted in the birth chart, describes a courage that has not been given much to test itself against yet, not a guaranteed store of bravery.

Where Parashari and Jaimini methods diverge on construction

The trine-based counting rule above, first decanate to the sign itself, second to the 5th, third to the 9th, applied the same way regardless of whether the sign is odd or even, is the version most widely taught and most widely implemented in chart software. It is usually the default a practitioner meets first.

Some Jaimini-lineage texts and some software options offer an alternate construction that brings in the odd or even parity of the sign, the same kind of split that governs several of the other shodasavarga, the dashamsha among them. Where the two methods diverge, they can place the same planet in a different D3 sign entirely, which is worth knowing rather than discovering by accident when two tools disagree on the same chart. If you are comparing a D3 reading against someone else's, or against a second piece of software, check which construction is in use before assuming one of you made an error.

The 36 drekkana images: a separate, older tradition

Classical texts also describe a set of thirty-six figures, one for each ten-degree decanate across the zodiac, each carrying its own description: a posture, an implement carried, sometimes a stated temperament. This is a genuinely older layer of the tradition than the D3-as-varga use, and its purpose was different. It described a native's physical bearing and character in a way closer to physiognomy than to house analysis, and it was used in horary work, judging a question by the decanate rising at the moment it was asked, rather than in the birth-chart varga sense at all.

This iconographic decanate tradition bears a real resemblance to the decan images used in Hellenistic astrology of roughly the same era, a resemblance historians of the field have written about, and it almost certainly reflects contact between the two traditions rather than coincidence. What matters for a practitioner today is narrower: reading a decanate's classical image to describe temperament, and reading a D3 chart's 3rd house to judge a sibling relationship, are two different exercises that happen to share a name. Treating a D3 chart's finding as though it carries the authority of the old iconographic description, or the reverse, is a conflation worth catching rather than repeating.

The mistake most readers make with this chart

The recurring error is the same one that shows up with every varga: reading the D3 as though it stands alone. A strong D3 lagna sitting on top of a birth chart 3rd house with no planets, no aspects and a weak lord does not describe a courageous, sibling-rich life. It describes an orderly expression of a theme the birth chart never really raised.

The varga refines a promise the D1 already makes. It does not create one that is not there. The working order is birth chart first, to see whether the 3rd house has anything substantial to say about siblings and self-effort, and D3 second, to see how that, if present, is likely to express itself. Reversing that order, starting from an appealing D3 and working backward to justify it against a thin D1, produces readings that feel precise and are not grounded in anything the chart actually supports.

How reliable is the D3, honestly

Each drekkana division spans 10 degrees, three times the width of a dashamsha division, so the D3 is less exposed to small birth-time errors than the D10 is. A time that is off by a few minutes will rarely be enough to move a planet across a 10-degree boundary. That gives the D3 more practical stability than some of the finer vargas, and it is one reason it holds up reasonably well even against birth times that are approximate rather than exact.

That stability has a limit. A planet or lagna sitting close to a 10-degree boundary is still vulnerable to the same problem in smaller form, and a birth time recorded to the nearest half hour, which is common enough on older birth records, can still land a boundary case on the wrong side. Where the D3 gives a clean read, well inside a division, it can be trusted with reasonable confidence. Where it sits near an edge, the same caution that applies to any varga chart applies here too.

If a specific chart raises a question here, birth time included, Ask Acharya is free to use and answers in your own language, and it is a better way to check a particular placement than trying to extend a general rule to a chart it has not seen. You can generate the full chart, drekkana included, through our free kundali tool, and if the question is about timing rather than shape, when a sibling-related period is likely to be active, our dasha calculator works out the sequence running for a given chart.