|Universe||Mass Effect Universe|
|Atmosphere||Unbreathable (Methane & Ethane)|
|Primary Terrain||Rock & Ice Fields|
|Orbital Period||4.0 Earth Years|
|Day Length||32.1 Earth Hours|
|Atmospheric Pressure||0.00 Earth Atmospheres|
|Surface Temperature||-178° Celsius|
|Surface Gravity||0.90 g|
|Notable Species||Various species of Terminus pirates (temporary)|
Antirumgon is a small rock and ice planet, with a trace atmosphere of methane and ethane. The frozen surface is mainly composed of carbon with deposits of calcium. Deposits of cobalt may also be found on its surface.
Antirumgon has been used as a crude anchorage for Terminus pirates for many years. The shells of temporary dwellings blasted by Alliance frigate patrols dot the surface. But always, the pirates return to ground their ships' drive charges, chip out some water ice, and trade slaves and stories.
The deeper layers of Antirumgon's interior are semi-liquid slush, due to the presence of methanol. It is thought that bacterium in the deep core create this natural anti-freeze. Some species of Terminus pirate drill through ice crust to recover this natural alcohol.