Ketu — essence and what was added to it
Ketu has no root essence in the classical verse.
No root essence is given for Ketu in the classical essence verse. NO root essence in ANY essence verse in the corpus - the only graha of which this is true
Later attribution: moksha-karaka. Attested, but a full tier weaker than the seven and than Rahu, and the difference is kept visible on purpose. Uttara Kalamrita carries it in the COMMENTATOR’s voice - “Jaimini takes Ketu to be a benefic in certain contexts. This seems to be valid because Ketu is a Moksha Karaka” - and the same page ends “The readers are requested to investigate further”. Hora Ratnam reports it at second hand and hedges the source: “We usefully find in certain Tamil works that Rahu is Gnana Karaka (sighificator of wisdom) while Ketu is Moksha Karaka”. Note that this witness assigns RAHU to wisdom, which contradicts Saravali’s Rahu-as-ego - so the two sources that supply nodal essences disagree about the node they both cover. BPHS has only a PLACEMENT rule (“One will attain final emancipation if Ketu is in the 12th”), which is a result, not an essence. Carried as the best available reading, flagged as commentary.
The three registers
One root, read at three levels. These are our derivations, not printed anywhere: each one has to follow from the root word above, and a reading that cannot be traced back to it is the fluff this method exists to remove.
Material. Loss, release, and what remains after subtraction. Materially Ketu is the graha of things ending without a transaction: nothing is exchanged, something simply stops.
Mental. Detachment and narrow, absorbed specialisation. The mind that goes deep at the cost of breadth. Also dissatisfaction that has no object - the feeling that this is not it, without a candidate for what would be.
Spiritual. Moksha-karaka in the later literature: liberation, renunciation, and the residue of past practice. This is the ONLY register in the whole table resting on commentary rather than a root verse, and it is carried on that footing.
What genuinely derives from it
dissolution, detachment, specialisation, residue
What was appended — and is not carried here
These do not follow from the essence. Where they encode a social rank or a rule about who a person may be, we do not use them.
- ‘Ketu governs mixed caste’ / intercaste-born gloss
How to use this
A claim that follows from the essence is carried. A claim that does not was appended, whenever it was written — and almost all of it turns out to concern caste, gender role or marriage eligibility.