|Universe||Mass Effect Universe|
|Radius||21,481 km (13,347.64897 mi)|
|Atmosphere||Hydrogen and helium with traces of sulphur and hydrocarbons|
|Notable Species||Possible hydrocarbon life (unverified)|
|Rotation period||13.7 Earth Hours|
|Orbital Period||56.9 Earth Years|
Chofen is an unusually small hydrogen-helium gas giant, with traces of sulphur and hydrocarbons in the atmosphere. The Alliance surveyor ship Ibn Battuta provided inconclusive evidence of hydrocarbon life in the atmosphere (over 1000 meters below the cloud tops), where pressure compresses Chofen's hydrogen into a liquid state.
Proof of life in the atmosphere would prove many long-standing theories. Unfortunately, only a probe with extremely expensive mass effect generators could survive the crushing pressure long enough to send back useful data—and the probe would be lost in the attempt. Simple expense makes investigation doubtful.