We actually don't know really anything about this planet, but one possibility is that it's a water world, like a scaled-up version of one of Jupiter's icy moons that might be 50 percent water by mass.
但我们对它的了解也仅限于此， 不过它上面可能有水存在， 有点像木星的一颗放大版的 遍布冰雪的卫星， 其水含量可能占据了质量的50%。