The Gayatri mantra for Ketu is a powerful invocation found in the tradition of Navagraha worship, as detailed in texts such as the *Mantra Mahodadhi* and the *Jyotisha* treatises. Ketu, the descending lunar node, is considered a shadow planet (chhaya graha) and is often associated with spiritual liberation, detachment, and karmic patterns. The mantra—'Om Ketave Vidmahe Dhvajaya Dhimahi Tanno Ketu Prachodayat'—follows the classic Gayatri meter of 24 syllables. The beej-akshara 'Ke' in 'Ketave' is said to resonate with the element of ether and the crown chakra, facilitating transcendence. The term 'Dhvajaya' (meaning 'flag' or 'banner') refers to Ketu's iconographic symbol, representing victory over material illusions. According to the *Mantra-Yoga-Samhita*, chanting this mantra with proper pronunciation purifies the subconscious mind and awakens latent spiritual insights. Traditional purposes include removal of obstacles caused by past-life karmas, protection from hidden enemies (such as deceit or slander), and relief from mysterious health issues that defy diagnosis. It is also chanted for spiritual awakening, as Ketu is the karaka (significator) of moksha. The recommended chanting count is 108 times daily, preferably during the early morning (Brahma muhurta) or on Saturdays, which are associated with Ketu. Ritual setting includes facing north or east, sitting on a brown or black cloth, and offering a brown lotus or sesame seeds. Cautions: Ketu's energy can be intense; beginners should start with a smaller count (e.g., 27 repetitions) and gradually increase. The *Devi Mahatmya* indirectly references Ketu's role in the cosmic play, while the *Lalita Sahasranama* includes names that invoke Ketu's protective aspect. This mantra should not be chanted without proper guidance if one is prone to anxiety or instability, as Ketu can amplify detachment. Overall, the Ketu Gayatri is a potent tool for those seeking spiritual growth and resolution of karmic debts.
Snake-bodied form or seated on vulture with flag.