NGC 1647

Number of stars per data source

	Reference  382 :  331 stars
	Reference  485 :    6 stars

382: Francic S.; (1989) Astron. J. 98, 888; Mass functions for eight nearby galactic clusters; 1989AJ.....98..888F
485: Baumgardt H., Dettbarn C., Wielen R.; (2000) Astron. Astrophys. Suppl. 146, 251; Absolute proper motions of open clusters. I. Observational data; 2000A&AS..146..251B