It has been noted (by Shoemaker and others) that the satellite crater Buch B is unusual in that it possesses both a dark halo of material around the rim and appears to have formed some dark rays.
Det er bemærket (af Shoemaker og andre), at satellitkrateret "Buch B" er usædvanligt ved både at have en mørk skygge af materiale liggende rundt om randen og samtidig synes at have dannet nogle mørke stråler.