Let's say there's a solid ball the size of Ceres orbiting the Sun at a very close distance inside the orbit of Mercury. Not Parker Solar probe close but close enough to get "sandblasted" by the star over the eons. It is tidally locked to the Sun. It's so close there is considerable spallation of the surface looking into the star. Other side is forever in darkness. Composition is almost all iron and nickel with some silicates near the surface and on it. No surface melting. There is zero