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|Orbital Distance||0.8 AU|
|Orbital Period||0.8 Earth Years|
|Day Length||53.8 Earth Hours|
|Atm. Pressure||0.98 atm|
|Surface Temp||36 °C|
|Surface Gravity||1.1 g|
|Mass||0.521 Earth Masses|
Altahe is an exceptional form of planet called a Roche World. Put simply, it is one half of a pair of small and unusually dense terrestrial worlds (Altahe and Ontahe) that orbit each other so closely, they effectively share a single atmosphere. That does not mean one could fly from one to the other, but both have identical atmospheres and dust from one often can be found on the other.
Both worlds share an atmosphere of nitrogen and ethane. The surface is warm, and mainly composed of silica dust and dark basaltic rocks, with extensive deposits of heavy metals and radioactives. Tidal effects from Ontahe create constant heavy wind.
- Assignment: UNC: Listening Post Theta
- Collection: UNC: Asari Writings: Matriarch's Writings ×1
- Survey: UNC: Valuable Minerals: Heavy Metal ×1 / Rare Element ×1
Points of InterestEdit
|1||Initial||Listening Post (UNC: Listening Post Theta)|
|2||Discovery||Anomaly (UNC: Asari Writings). The "song" commonly associated with the rachni can be heard near the wreckage. |
“This downed satellite had one of Matriarch Dilinaga's writings stored in its payload. Whether it was placed before or after it crashed is uncertain.”
|3||Discovery||Crashed Pod (salvage)|
- Main article: UNC: Valuable Minerals
Ontahe is strictly speaking the second partner in a dual system, Charon to Altahe's Pluto. Both likely orbit with synchronous rotation to one another; Ontahe is always in the same place in Altahe's sky and always shows the same face.
At the Mako landing site, Ontahe is visible near the horizon. This hints that the Mako has landed far from the equator (where Ontahe would be directly overhead), around one of the arctic circles.
- The name given for the planet type, a Roche world, is likely referring to the Roche Limit. This limit describes the distance at which a celestial body orbiting another will begin to disintegrate as tidal forces overcome gravitational binding.