IC 4651

Number of stars per data source

	Reference  405 :   63 stars
	Reference  420 :   10 stars

405: Anthony-Twarog B.J., Twarog B.A.; (1988) Astron. J. 94, 1222; uvby beta photoelectric and CCD photometry of IC 4651; 1988AJ.....94.1222A
420: Nissen P.E.; (1988) Astron. Astrophys. 199, 146; The fourth-parameter problem in uvby-beta: photometry of open clusters; 1988A&A...199..146N