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Mass Effect 2 Planetary Database: Entry Details
Partholon
System: Caleston Rift
Cluster: Balor
Anomaly/Landable: No
Installation: Base Installation
Orbital Distance: 11.2 AU
Orbital Period: 68.6 Earth Years
Radius: 11,921 km
Day Length: 28.2 Earth Hours
Atmospheric Pressure: Trace
Surface Temperature: -236 Celsius
Surface Gravity: 6.6 G
A large planet composed of ice surrounding a rocky core, Partholon retains trace gases of nitrogen and carbon monoxide. Its crushing gravity makes for an inhospitable stay and makes most mining infeasible. However, its orbit's proximity to the mass relay in the system means space travelers will, for the next few years, use it for a gravitational slingshot to add speed on their way to and from Caleston.