Purva Bhadrapada is nakshatra number 25 of the 27 lunar mansions in Vedic astrology, spanning 320.00° of the zodiac in 13°20' steps. Its planetary lord is Jupiter and its presiding deity is Aja Ekapada.
The Moon's position in Purva Bhadrapada at birth shapes the Vimshottari Mahadasha sequence — a Purva Bhadrapada 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 Purva Bhadrapada is your janma nakshatra, and the Panchang to see exactly when the Moon transits Purva Bhadrapada on any date.