Nakshatra lord (star ruler)
The nakshatra lord is the planet that rules a nakshatra in the Vimshottari dasha system. Nine planets rule the 27 stars in a repeating cycle from Ketu to Mercury, and your birth star’s lord runs your first dasha.
Also known as: Nakshatra swami, Nakshatra adhipati, Star lord, Nakshatra ruling planet
Each nakshatra has a planetary ruler. The order is Ketu, Venus, Sun, Moon, Mars, Rahu, Jupiter, Saturn and Mercury, repeated three times around the zodiac. So Ashwini, Magha and Mula are ruled by Ketu; Bharani, Purva Phalguni and Purva Ashadha by Venus; and so on, until Ashlesha, Jyeshtha and Revati, which are ruled by Mercury.
The lord matters most for timing. In Vimshottari dasha, life begins in the dasha of the birth star’s lord, and the part of that nakshatra the Moon still had to cross sets how much of that first dasha remains: the dasha balance. The lord of the nakshatra a planet occupies also colours how that planet behaves in a chart.
Don’t confuse the nakshatra lord with the nakshatra’s deity, or with the lord of the sign it falls in. Rohini, for example, is ruled by the Moon, presided over by Brahma and lies in Taurus, a sign ruled by Venus. Each layer describes something different.