Own-Star and Untenanted-Star Conditions
A planet in its own star
When a planet occupies a nakshatra ruled by itself, the planet and star-lord levels coincide. Its own house occupation and ownership become especially direct parts of that stellar relationship. This is different from saying that the planet has no sub-lord or that other conditions cease to apply.
Untenanted stars
A planet may have no other standard planet occupying any of its three stars in a particular chart. Some approaches give that condition special priority in significator analysis. The condition should be recorded explicitly and not confused with an empty house.
Method-specific priority
Own-star and untenanted-star conditions occur in discussions of primary and secondary significators, including later approaches. Their precise effect depends on the adopted method. They should not be combined into a universal claim that a planet is untethered, exceptionally powerful or independent of all stellar interpretation.
A reference distinction
An empty house refers to house occupation. An untenanted star refers to other planets' nakshatra positions. A planet in its own star refers to that planet's longitude and nakshatra ruler. These are three separate conditions that can overlap without being identical.