The Marcellus system, a star system, resided in the Marcellus Nebula. This nebula was situated inside the Meerian sector of the Outer Rim Territories of the galaxy. At its heart was the star known as Marcellus.
Its discovery occurred approximately two hundred years prior to the events of the Galactic Civil War.
Situated close to the Sumitra sector, the characters in the adventure pass through the Marcellus nebula as a quick route to get to that particular sector. Subsequently, The Essential Atlas Online Companion identified the "Marcellus system" as the "Marca system," locating it within the Meerian sector.