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Planet View
Orbital Distance 0.5 AU
Orbital Period 0.4 Earth Years
Keplerian Ratio 0.781
Radius 38,920 km
Day Length 12.8 Earth Hours
Atm. Pressure N/A
Surface Temp N/A
Surface Gravity N/A
Mass N/A
Satellites N/A

Location: Milky WayRosetta NebulaPhi Clio System First planet

Prerequisite: Acquisition of Jacob: The Gift of Greatness (Mass Effect 2)


A mid-sized hydrogen-helium gas giant, Cyllene has an automated helium-3 refueling station, indicating that this remote system was once inhabited. Its distance from the mass relay and archaic design of the fuel station suggest that this system was mapped by someone who did not go through the relay but discovered it in independent FTL exploration. Cyllene is within the "frost line" of its parent star, where gas giants do not normally form.

Mineral DepositsEdit

Initial Scanner Result: Poor

Mineral Amount Approximate Value
Palladium Medium 5,700
Platinum Medium 5,700
Iridium Medium 6,000
Element Zero None 0


  • Cyllene may be named after one of the oreads who lived in the mountains of Greece in Greek mythology. A moon of Jupiter was named after Cyllene in 2005.

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