found: Brandt, J.C. Introduction to comets, 2004:p. 30 (Comet 5D/Brorsen)
found: Kronk, G.W. Comets : a descriptive catalog, 1984:p. 229 (Brorsen. T. "Brorsen (Kiel, Germany) discovered this comet on Feb. 26, 1846 during a routine comet-hunting session. [...] Astronomers are currently undecided as to the fate of Comet Brorsen, for after the 1879 appearance it was never seen again. [...] Japanese observers carried out several searches for the comet in 1973, but failed to locate any trace, thus supporting the theory that the comet no longer exists.")
found: Wikipedia, Oct. 17, 1007Theodor Brorsen (Theodor Johan Christian Ambders Brorsen (July 19, 1819-March 31, 1895) was a Danish astronomer best known for his discovery of five comets, including the lost periodic comet 5D/Brorsen and the periodic comet 23P/Brorsen-Metcalf. Brorsen discovered five comets: 1846 III, 1846 VII, 1847 V, 1851 III and 1851 IV. Two of them were named after Brorsen as they are periodic comets. The comet 1846 III is called Brorsen and the comet 1847 V is named Brorsen-Metcalf (because Joel Hastings Metcalf was its rediscoverer in 1919). The comet 5D/Brorsen (with a period of 5.46 years) was last seen in 1879. In all, five of its rotations around the sun were observed. It belonged to the Jupiter comet family, whose comets can be short-lived so it may not exist any longer today.)
