Ketu is considered a chaya grah(shadowy planet) but still considered as one of nine major planets in vedic astrology. Ketu is considered a foot soldier in planetary cabinet. Ketu rules the north-east(Ishaan) direction and has excess of fire element. Ketu's color is black according to Bhrigu Samhita. Ketu governs the mixed caste. Ketu's vimshottari dasha runs for seven years.

Ketu somewhat resembles Mars in demeanor as it is always angry and frustrated. Ketu is anti-social and rejects societal norms. Ketu seeks materialistic detachment and solitude. It is the only other planet apart from Jupiter which can grant moksha to an individual.

According to BPHS Chapter 47 exaltion sign of Ketu is Scorpio. Bhrigu Samhita claims Sagittarius to be exaltion sign of Ketu.

Debilitation sign of Ketu must be Taurus although there is no mention in BPHS. Bhrigu Samhita claims Ketu is debilitated in Gemini.

Ketu owns Scorpio while its moola-trikona sign is Sagittarius according to BPHS. Some astrologers claim Ketu owns Pisces.

Ketu owns Ashwini, Magha and Moola nakshatras.

To strengthen Ketu one must wear cat's eye(lehsuniya).

Ketu is said to mature at 48 years of age.

Ketu considers Venus and Saturn as his friends.

Ketu considers Sun, Moon, Mars and Jupiter as his enemies.

Ketu remains neutral towards Mercury.

Ketu represents moksha, solitude, spirituality, frustration, disillusionment, rags(torn clothes) and resentment.

Ketu is associated with black urad(vigna mungo), black sesame seeds and black fruits.

Ketu is associated with hair and can cause spinal problems.

Ketu provides spirituality, solitude, good medicinal knowledge and occults knowledge. Perhaps the biggest positive is Ketu's ability to remove Rahu's illusion spell and give clarity of thought to a person.

Ketu is anti-social, rejects societal rules and regulations, hates friendsip and bonding, is frustrated and angered easily.

Ketu causes early greying of hair or baldness. Ketu influencing ascendant or moon or placed in trines is known to increase anger and frustration in an individual. Ketu can also cause problems in spine and lower back.

Ketu has excess of fire element and causes Pitta Dosha to increase in body. This in turn leads to acid reflux, GERD, pimples, piles and other heat related disorders. Ketu is known to cause anger related mental ailments like borderline personality disorder, intermittent explosive disorder and other anger related disorders. Ketu also causes problems in digestion, intestine as well as womb of pregnant females. Ketu can also causes UTI, swelling and burning sensation in urinary tract.

Ketu has good psychic abilities and ability to see through illusion. Ketu can provide an excellent career in occults especially astrology, tarots, palm reading etc. Ketu has qualities associated with Mars and can grant roles similar to Mars like surgery and medicine. Although scope maybe limited to minor surgeries and lesser medical careers like veterinarian or general physician. Ketu can provide career as a mercenary who fights for profits. Ketu can also grant roles in software and hardware. Ketu is into spirituality and can provide wonderful career as a priest and spiritual guru. Any job that requires killing, cutting and stitching like tree cutting, cutting and stitching clothes, knitting and animal slaughter houses are possible due to Ketu.

Ketu is all about detachment. Ketu can provide an excellent career as a divorce lawyer who helps couples separate. Ketu can also provide a good career for surgeons involved in gender change surgeries. Ketu can help start a private military company which provides mercenaries. Ketu can also help start a spiritual or occults center which provides spiritual and astrological guidance.