Sanyasa yoga in Hindu astrology are the peculiar planetary situations or combinations seen in certain horoscopes that indicate Sanyasa i.e. renunciation of worldly material life by persons born with those yogas. Sanyasa yogas are also known as Pravrajya yogas.
Sanyasa, this word is mentioned for the first time in the Mundaka Upanishad, it is the path of renunciation. A Sanyasi is one who has risen above the mundane ambitions of a householder and also the silence and penance of a recluse. According to the Bhagavad Gita, Sanyasa means relinquishment of actions arising from desires, and Tyaga means relinquishment of fruit of all actions. The sanyasis are eligible to pursue the path of knowledge; they have no need to perform ritual or tend the sacred fire - अतएव चाग्निन्धनाद्यनपेक्षा | (Brahma Sutra III.iv.25).
Sanyasa yogas in Hindu astrology are the planetary situations or combinations in certain nativities (horoscopes) indicating Sanyasa. Sanyasa yogas are also known as Pravrajya yogas. They are auspicious yogas.
True Sanyasa yogas are very rare.
Sanyasa yoga arises when four or more strong planets combine in one house or sign, the nature or kind of Sanyasa adopted depends upon the strongest planet in that particular group of planets. If the Sun be the strongest planet the person of high morals and intallectual prowess will choose severe and difficult practices in remote places; if it be the Moon, then in seclusion more in the study of scriptures; if it be Mercury, one who is easily influenced by philosophy of others; if it be Mars, one who chooses to wear red-coloured clothes and who struggles to control his temper; if it be Jupiter, one who has complete control over his senses and sense - organs; if it be Venus, a wandering mendicant, and if the strongest planet be Saturn it makes one adopt exceedingly severe practices. The involvement of the lord of the 10th house in this conjunction of four or more planets is the stronger indicator of Sanyasa. If those four or more planets happen to conjoin in a kendra or in a trikona, then the person attains Moksha but if they conjoin in the 8th house there will be Yogabhrashta i.e. there will be break in yoga-operation, and fall from the final state of emancipation. If strongest of the conjoining planets is combust then there will be no sanyasa and if it is defeated in planetary warfare one returns to worldly life after taking sanyasa. Sanyasa is also indicated when the Moon in a drekkena of Saturn is aspected by Mars and Saturn or is in a navamsa of Mars aspected by Saturn. A person takes to sanyasa if the dispositor of the Moon is aspected by Saturn and not by any other planet or if aspected by all planets occupying a single house or sign or if Jupiter is in the 9th house and Saturn aspects the lagna (Ascendant), the Moon and Jupiter, such a person will write on Sastras and found a school of philosophy, and in case Saturn not aspected by any planet is in the 9th house then one born a king will take to sanyasa.