Advances were made in understanding sungrazing comets in the 19th century with the Great Comets of 1843, C/1880 C1, and 1882. C/1880 C1 and C/1843 D1 had very similar appearances and also resembled the Great Comet of 1106, therefore Daniel Kirkwood proposed that C/1880 C1 and C/1843 D1 were separate fragments of the same object. He also hypothesized that the parent body was a comet seen by Aristotle and Ephorus in 371 BC because there was a supposed claim that Ephorus witnessed the comet splitting after perihelion.