Planets in houses · Dusthana
Ketu in the 12th house
South node · Vyaya Bhava
Ketu is the karaka (significator) of detachment, intuition, spirituality and past karma. The 12th house, called Vyaya Bhava, shows expenses, foreign lands and moksha. When Ketu sits here, these matters take on its colour.
In the 12th house a malefic can raise expenses, losses or sleep trouble, but also helps detachment and work abroad.
The 12th house is a dusthana (house of difficulty), so results here come through challenges and need conscious handling.
Ketu is a shadow graha and gives the results of the sign lord and conjunct grahas; it is considered strong in Vrishchika.
Results are weaker if Ketu is debilitated in Vrishabha, combust, or afflicted by malefics.
In transit (gochar)
When Ketu transits the 12th house counted from your Moon sign, the period traditionally needs more care.
A single placement is never read alone: sign, aspects, conjunctions, dasha and the whole chart change the outcome.