Complex sentence: It was discovered on 30 September 1861 by Heinrich d'Arrest, who described it as "faint, small, round, between 11th and 14th magnitude stars" (to the north and south).
Split into simpler sentences: It was discovered on 30 September 1861 by Heinrich d'Arrest. He described his discovery as "faint, small, round, between 11th and 14th magnitude stars" (to the north and south).