Given the very similar color of the moon to that of Nereid together with a high probability ( 41 % ) of their collision in the lifespan of the Solar system , it has been suggested that the moon could be a piece of Nereid . Given the very similar color of the satellite to that of Nereid together with the high probability ( 41 % ) of collision in the past lifespan of the Solar System , it has been suggested that the satellite could be a fragment of Nereid .