Illium
Star, position:	Tasale, II
Location:	Tasale / Crescent Nebula / Milky Way Galaxy
Gravity:	1.2 G
Diameter:	7,431 km
Day length:	25 Earth hours
Year length:	702 Earth days
Atmosphere:	1.15 atm
Temperature:	63 °C
Adjective:	Illian
Population:	84.9 million
Species:	Inusannon Prothean Asari Salarian Turian Human Hanar Drell Elcor Volus Batarian Quarian Krogan
Societal approximation:	Democratic/corporatocratic
Affiliation:	Bastion Confederate Prothean Empire Asari Republics First Illian Republic Second Illian Republic United Citadel Council of Species New United Galactic Front of Races Titan Covenant Galactic Dominion (briefly) Unified Republics of the Milky Way
Technological tier:	Tier VII
Capital:	Nos Astra

Illium (formerly known as the Xesh Confederate to the Inusannon) is the second planet in the Tasale system of the Crescent Nebula, and the capital of the First Republic of Illium and, later, the Second Republic. Before 2186 CE, Illium was the largest and wealthiest asari colony not in republic space.