Adeptus Astartes Homeworld

A Space Marine homeworld is the base for a Space Marine fortress-monastery. For some Chapters the world also serves as their sole recruiting world; other chapters draw their recruits from several planets.

A "Chapter planet" is an Astartes world which is both governed by the chapter and which serves as the base for their fortress-monastery³.

Astartes homeworlds may be Imperial planets, while some are not planets at all, but take the form of orbiting spacecraft, deserted moons and asteroids. The commander of the chapter is often also the traditional ruler of the chapter planet, in which case the Chapter Master also holds the rank of Planetary Governor.¹

Many Astartes homeworlds are Feral Worlds, which provide the best warriors. Not all Space Marine Chapters have a single homeworld; some chapters such as the Imperial Fists, Black Templars and Blood Ravens take their aspirants from several different worlds. Entirely fleet-based chapters do not possess worlds, and instead recruit from any convenient and promising worlds.

Several Space Marine Chapters guilty of treason (but those still deemed redeemable), such as the Mantis Warriors and Executioners, have been forced to forfeit their homeworlds - which forces them to become totally fleet-based chapters².

List of Adeptus Astartes Homeworlds

Planet name	Segmentum	Sector	Subsector	System	Population	Space Marine Legion or Chapter
Baal	Ultima Segmentum	Unknown	Unknown	Unknown	122,000	Blood Angels
Badab	Ultima Segmentum	Unknown	Unknown	Sfantu system	Unknown	Astral Claws
Barbarus	Unknown	Unknown	Unknown	Unknown	Unknown	Death Guard
The Black Planet	Unknown	Unknown	Unknown	Unknown	Unknown	Harbingers
Caliban Destroyed	Segmentum Obscurus	Unknown	Unknown	Caliban System	N/A	Dark Angels
Chemos Destroyed	Unknown	Unknown	Unknown	Chemos System	N/A	Emperor's Children
Colchis	Unknown	Unknown	Unknown	Unknown	Unknown	Word Bearers
Cretacia	Unknown	Unknown	Unknown	Unknown	Unknown	Flesh Tearers
Cthonia	Segmentum Solar	Unknown	Unknown	Cthonia System	Unknown	Black Legion (Sons of Horus)
Deliverance	Segmentum Tempestus	Unknown	Unknown	Unknown	Unknown	Raven Guard
Fenris	Segmentum Obscurus/ Segmentum Solar	Unknown	Unknown	Fenris System	Unknown	Space Wolves
Macragge	Ultima Segmentum	Unknown	Ultramar	Macragge System	400,000,000	Ultramarines
Medusa	Segmentum Obscurus	Unknown	Unknown	Unknown	Unknown	Iron Hands
Mundus Planus	Ultima Segmentum	Unknown	Unknown	Unknown	10,000,000	White Scars
Nocturne	Ultima Segmentum	Unknown	Unknown	Unknown	15,000,000	Salamanders
Nostramo Destroyed	Unknown	Unknown	Unknown	Unknown	N/A	Night Lords
Olympia	Unknown	Unknown	Unknown	Unknown	Unknown	Iron Warriors
Pervigilium	Unknown	Unknown	Unknown	Unknown	Unknown	Angels of Vigilance
Posul Destroyed	Segmentum Tempestus	Unknown	Unknown	Unknown	N/A	Mortifactors
Prospero Destroyed	Ultima Segmentum	Prospero	Prospero	Prospero System	N/A	Thousand Sons
Rynn's World	Ultima Segmentum	Loki Sector	Unknown	Rynnstar System	Unknown	Crimson Fists
Terra	Segmentum Solar	Sector Solar	Subsector Sol	Sol System	Unknown	Imperial Fists
Titan	Segmentum Solar	Sector Solar	Subsector Sol	Sol System	Unknown	Grey Knights
Torva Minoris	Segmentum Obscurus	Unknown	Unknown	Torva	Unknown	Relictors
Sacris	Segmentum Obscurus	Calixis Sector	Drusus Marches	Unknown	Unknown	Storm Wardens
Scelus	Segmentum Obscurus	Cadian Sector	Unknown	Unknown	Unknown	Sons of Malice (excommunicated)

Sources

• ¹:Warhammer 40,000: Rogue Trader
• ²:White Dwarf 101(uk), "Index Astartes: The Badab Uprising", Rick Priestley
• ³:Codex Imperialis