Elduros system

From Halopedia, the Halo wiki

Elduros system
Stellar overview

Orbiting planets:


Societal overview


Unified Earth Government[1]


Elduros is a planetary system located among humanity's Outer Colonies and centered around the unstable star Elduros.[2][3] The system is home to Aleria, a colony world formerly controlled by the Unified Earth Government.[3]


Planetary system[edit]

  • Aleria - Second orbital position, human colony world.[3]

There are two planets in orbit around Elduros.[2] At some point between 2490 and 2453,[4][5] the solar activity of Elduros came to an end after millennia of stability. The star's instability led to a dramatic rise in temperatures on Aleria and presumably the other planet in orbit around Elduros as well.[3] By August 2558, it was predicted that Elduros' unstable phase would last another century, but that its subsequent stable phase would last three times that.[6]


In 2490,[4] humanity colonized the Elduros system, establishing a UEG colony on Aleria. Shortly after Aleria was colonized, Elduros ended a millennia-long period of low solar activity. The star's recommenced instability led to the rise of temperatures on Aleria,[3] eventually leading to a drought that began in 2453 and is still ongoing as of 2556.[5] The UEG has since abandoned the planet due to financial concerns, and Aleria is now under the control of various courier guilds.[3]

By 2557, the Via Casilina Trade Route had arisen from the ashes of the Human-Covenant War between the Qab, Cordoba, Shaps, Elduros, and Sverdlovsk systems.[7]

List of appearances[edit]


  1. ^ Cite error: Invalid <ref> tag; no text was provided for refs named Enc22P49
  2. ^ a b Halo: Nightfall, "ONI: Trade Barriers"
  3. ^ a b c d e f Halo Waypoint: Aleria
  4. ^ a b Halo Encyclopedia (2022 edition), page 50
  5. ^ a b Halo Waypoint: Canon Fodder - Second to None
  6. ^ Halo: Point of Light, page 219
  7. ^ "Into the Fire" — Halo: Fractures, p. 239 (Google Play edition)