Characteristics NGC 3506 is classified as a spiral galaxy, though its precise subtype (e.g., Sa, Sb, Sc) can vary slightly between classifications. It exhibits the characteristic spiral arms extending from a central bulge. Observations indicate it is an unbarred spiral galaxy. The galaxy is relatively distant, and its apparent magnitude makes it a faint object requiring telescopic observation.
Discovery The galaxy NGC 3506 was discovered by the astronomer William Herschel on December 30, 1783. His systematic observations and cataloging efforts led to the inclusion of numerous such celestial objects in what would later become the NGC.