Planets in houses · Kendra
Ketu in the 1st house
South node · Tanu Bhava
Ketu is the karaka (significator) of detachment, intuition, spirituality and past karma. The 1st house, called Tanu Bhava, shows self, body and personality. When Ketu sits here, these matters take on its colour.
A malefic in the Lagna gives strength of will and drive, but can make one impatient or harsh and needs care for health.
The 1st house is a kendra (angular house), a pillar of the chart, so a graha here shows its results openly and strongly.
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 1st 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.