John Herschel discovered NGC 3582 = h3327 on 14 Mar 1834 in a complex of emission nebulae. He noted "R; has a * in middle. Place by collation of diagrams." Joseph Turner sketched the complex of nebulae in 1876 with the 48" Great Melbourne Telescope (plate IV.35 at www.docdb.net/history/texts/1885osngmt________e/lithograph_m_4_35.php).

400/500mm - 18" (7/7/02 - Magellan Observatory, Australia): NGC 3582 is another fan-shaped section which wraps around a mag 10.6 star. It has a well-defined edge running SW to NE with the northern border running E-W. The brighter star is embedded roughly in the center and several mag 13 stars are near the border. The diameter is ~2' (similar in size to NGC 3581 just SW).

Notes by Steve Gottlieb