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Planet View
Type Desert
Orbital Distance 4.1 AU
Orbital Period 8.3 Earth Years
Keplerian Ratio 1
Radius 3,581 km
Day Length 28.5 Earth Hours
Atm. Pressure 0.05 atm
Surface Temp −116 °C
Surface Gravity 0.56 g
Mass 0.175 Earth Masses
Satellites N/A

Location: Milky WayHourglass NebulaPloitari System Fourth planet

Prerequisite: Priority: Thessia (Mass Effect 3)


Thegan rounds out the trio of planets scouted only by space probe in this backwater solar system. A frozen ball with significant amounts of tin in its crust, Thegan has a fractional atmosphere with trace amounts of carbon dioxide and carbon monoxide. Strange radiation emissions have been charted coming off of Thegan, but it is unknown if these are from radioactive elements or merely a star's radiation reflected by a high-albedo surface.

Mineral DepositsEdit

Initial Scanner Result: Rich

Mineral Amount Approximate Value
Palladium High 12,800
Platinum Medium 6,700
Iridium Medium 8,300
Element Zero Low 4,500

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