Planets in houses · Trikona
Ketu in the 9th house
South node · Dharma Bhava
Ketu is the karaka (significator) of detachment, intuition, spirituality and past karma. The 9th house, called Dharma Bhava, shows luck, dharma, father and higher learning. When Ketu sits here, these matters take on its colour.
In the 9th house a malefic can test faith or relations with father and teachers, and makes one follow one's own path.
The 9th house is a trikona (trine), one of the houses of fortune, which improves whatever graha sits here.
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 9th 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.