Giovanni Domenico Cassini

Cassini discovered the open cluster M 50 in Monoceros about 1709. It was later found by Messier and Bode again; see: Messier C., Catalogue des Nébuleuses et des amas d'Etoiles, Connoissance des Temps 1784, 227-272 (1781).

D N NI Y Ap I T Observer Name Con Type S
1 N 2323 1709? 5,0 Rr v Messier 5.4.1772
Bode 2.12.1774
M 50 MON II3m 4

Paris Observatory