Yilit is a Mega-Earth in the Defan system it is responsible for the highly elliptical orbit of Defan. It along with Teug (the red dwarf) are responsible for the massive tidal forces that are trying to rip Defan apart its tidal forces keep defan from being tidaly locked to Teug. Yilit also has a massive atmosphere with pressures over 3 times that of Venus and a incredibly hot water sea encompassing the planet underneath. It is suspected to be a former ice giant that's outer layers got blown off over billions of years by Teug.

Radius: 2 earth radii (2.6 including atmosphere and ocean)

Mass 12.4 earth masses

Moons: 6 the largest being the size of mars less massive than defan

Mean Temperature: 354K (moon: 230 K)

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