Jyeshtha is nakshatra number 18 of the 27 lunar mansions in Vedic astrology, spanning 226.67° of the zodiac in 13°20' steps. Its planetary lord is Mercury and its presiding deity is Indra.
The Moon's position in Jyeshtha at birth shapes the Vimshottari Mahadasha sequence — a Jyeshtha birth begins life in the Mercury 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 Jyeshtha is your janma nakshatra, and the Panchang to see exactly when the Moon transits Jyeshtha on any date.