In Vedic astrology, Ketu is regarded as a malefic planet that brings about challenges and obstacles in life. When it is placed in the 12th house for Sagittarius ascendant or lagna, this can result in certain predictions in terms of one's professional and personal life.
The placement of Ketu in the 12th house signifies a strong spiritual inclination, which means that individuals with this placement may be inclined towards seeking spiritual pursuits throughout their lives. However, this may also lead to detachment from worldly affairs and relationships. Such people may find themselves more successful in fields that involve serving humanity or helping others through charity or social work.
Moreover, Ketu's aspect on the second house points towards an increased probability of financial instability during one's lifetime. Individuals with this placement might have to struggle financially throughout their life span due to unexpected expenses or sudden loss of income. In addition to financial instability, Ketu’s influence on financial matters can also result in a lack of wealth accumulation despite working hard.
Ketu’s aspect on the sixth house indicates health-related challenges such as chronic illnesses, particularly related to nerves or feet-related diseases. This can cause disruption in one’s daily routine and lead to more significant challenges with regards to overall physical well-being. The beneficial impact of exercise should not be ignored due to health risks associated with this position.
Furthermore, Ketu's aspect on the ninth house relates more towards higher education, overseas travel, and spirituality. It may cause some hindrances while going abroad for studies purposes; however, it generally does not affect your international journey significantly unless jointly afflicted by other planets. One may face difficulties while pursuing higher education; It could create a lack of interest or uncertainty–which often makes you challenged when making decisions.
Overall these placements would make it easier for individuals with Sagittarius ascendants to overcome challenges if they develop a sense of optimism and determination within themselves. Although financial struggles appear likely, one’s spiritual inclination and determination to support humanity can generate financial opportunities somehow.
In conclusion, Ketu’s placement in the 12th House with aspect on the 2nd, 6th and 9th houses can bring about both advantages and obstacles concerning several factors of an individual's life. It may lead to mental stress, financial instability, and health problems; nonetheless it can also create spiritual involvement making you prone to pursue social work. Thus, one should remain optimistic and determined regardless of any adverse circumstances. By developing a proactive approach towards the challenging times imposed by Ketu's placement in the 12th house would make individuals stronger mentally emotionally or physically despite difficulties brought upon by such celestial bodies in astrology.