Adolph Cornelius Petersen

In 1849 Petersen found the open cluster NGC 2194 in Orion with the 7" Repsold refractor at Altona Observatory (near Hamburg). However, the very discoverer is W. Herschel.

D N NI Y Ap I T Discoverer Observer Con Type S Author Title Source
  N 2194 1849 7,0 Rr v Herschel W. 11.2.1784 d'Arrest 18.9.1862 ORI III1r 4 Petersen, A. C. Letter from Dr. A. C. Petersen of the Altona Observatory to the editor AJ 1, 47-48 (1850)