Ketu (South Node) in Vedic Astrology

The body without the head

When Vishnu's discus severed the asura who had stolen a sip of amrita, the head went one way and the body the other. Ketu is the body: it can act but cannot see, taste or speak, so tradition reads it as instinct and perception that bypass the thinking mind. Where Rahu hungers for more, Ketu has already lost what it held and has learned not to grasp. That is why the same tradition that fears Ketu's sudden cuts also honours it as the graha that frees.

Popular worship links Ketu with Ganesha, the god whose own head was replaced, and with the flag atop a temple, the dhvaja.

Ketu's significations

BPHS counts Ketu a natural malefic and places it, with Rahu, as the army of the planetary cabinet, describing it as similar to Rahu in form. Its karaka roles are liberation (moksha), detachment, spiritual insight, past karma and sudden separations. BPHS gives it rags for clothing and links it with mixed communities, images of a life outside ordinary comfort. In Jaimini's system Ketu is read for moksha and for the inner turn of a chart, especially through the 12th house.

Dignity of the south node

In the passage of BPHS that sets out the nodes' dignities, Ketu is exalted in Scorpio, debilitated in Taurus, has its mooltrikona in Sagittarius and owns Scorpio, so its own sign and exaltation fall together. The same passage notes that some sages make Pisces its own sign, and many practitioners use Sagittarius as its exaltation. No degrees are given, and BPHS assigns Ketu no gender, element, guna or directional strength; Brihat Jataka gives it no direction either.

Kujavat Ketu: reading the node through Mars

BPHS gives Ketu no line in its friendship table, so tradition applies the maxim Shanivat Rahu, Kujavat Ketu: Rahu behaves like Saturn and Ketu like Mars. Read through Mars, Ketu counts the Sun, Moon and Jupiter as friends, treats Venus and Saturn as neutral and Mercury as an enemy, and the table on this page follows that convention, though others exist. The Mars likeness also fits Ketu's style: sharp, sudden and cutting, more scalpel than hammer.

Aspect, nakshatras and the seven-year period

Ketu always casts the 7th-house aspect, and many practitioners also give it full 5th and 9th aspects; views differ. Its nakshatras are Ashwini, star of the twin healers the Ashvins, Magha, the throne of the ancestors (pitris), and Mula, the root, given to Nirriti, goddess of dissolution: healing, lineage and uprooting. Its Vimshottari mahadasha is seven years, and a separate Ketu mahadasha guide on the site covers it.

Transit: always opposite Rahu

Ketu moves backwards through the zodiac with Rahu, spending about eighteen months in each sign and always occupying the sign opposite it. Eclipses happen at Ketu's end of the axis as well as Rahu's. Counted from the natal Moon, Phaladeepika makes its transit favourable in the 3rd, 6th and 11th houses. Ketu crossing a natal planet is usually read as a loosening, interest withdrawn from that planet's affairs, not as loss.

Upaya: practices associated with Ketu

Ketu owns no weekday. Because it is read like Mars, Tuesday is commonly used, and some families keep Saturday instead. Ganesha worship is the usual devotional route, with the mantra Om Sraam Sreem Sraum Sah Ketave Namah, gifts of multicoloured blankets or sesame, and feeding stray dogs, a widely kept custom. Meditation, simplicity and willingness to let go are counted the real practice. Cat's eye (vaidurya or lahsuniya) is the traditional gem association; wearing it is a personal choice that this page does not recommend, and no gem stands in for medical, financial or legal advice.

Ketu, research and the inner life

Tradition connects Ketu with research, mathematics, coding, languages, alternative healing, astrology and spiritual teaching, work done in depth and often out of sight. A strong Ketu is read as the specialist who knows one thing completely and cares little who notices.

What does Ketu mean in Vedic astrology?

Ketu is the south node of the Moon, the point opposite Rahu where the Moon's path crosses the ecliptic heading south. The word means banner or comet, and the graha is linked with detachment, past karma and moksha.

Which day is associated with Ketu?

Ketu owns no weekday. Because it is read like Mars, Tuesday is most commonly used for Ketu practices, along with Ganesha worship and a Ketu mantra.

What is Ketu's gemstone?

Cat's eye, lahsuniya, is the traditional gem association. Wearing it is a personal and traditional choice this page does not recommend, and it does not replace medical, financial or legal advice.

Is Ketu always malefic?

Ketu is a natural malefic, yet tradition reads it well in the 3rd, 6th and 11th houses and honours it as the significator of moksha. Its sign lord and companions shape its results.

How long does Ketu stay in one sign?

About eighteen months, moving backwards. It always sits exactly opposite Rahu, so the two nodes change sign together.

What is the difference between Rahu and Ketu?

They are the two ends of one axis and the head and body of one myth. Rahu is read as appetite and reaching outward, Ketu as detachment and turning inward, and they always occupy opposite signs.