Punarvasu is nakshatra number 7 of the 27 lunar mansions in Vedic astrology, spanning 80.00° of the zodiac in 13°20' steps. Its planetary lord is Jupiter and its presiding deity is Aditi.
The Moon's position in Punarvasu at birth shapes the Vimshottari Mahadasha sequence — a Punarvasu birth begins life in the Jupiter mahadasha, with the balance of that period decided by how far the Moon had travelled through the nakshatra.
Use the free Kundli generator to find whether Punarvasu is your janma nakshatra, and the Panchang to see exactly when the Moon transits Punarvasu on any date.