Let me start by checking if there's a known white dwarf named or numbered as "458". Sometimes astronomical objects are listed in catalogs like NGC, Messier, or others, but 458 isn't a standard catalog ID. Alternatively, it might be part of a different naming convention, like G-type white dwarfs. For example, some white dwarfs are named G458 or similar. Wait, I recall the white dwarf WD 458, which might be a real object.