IC 4756

Number of stars per data source

	Reference   19 :  131 stars
	Reference   50 :   37 stars

References

 19
Kopff E.
(1943) Astron. Nach. 274, 69
Untersuchung der offenen Sternhaufen IC 4665, NGC 6633, IC 4756
1943AN....274...69K
 50
Cannon A.J., Pickering E.C.
(1918-1924), Ann. Obs. Harvard Coll. Obs. 91 to 99 and 100
Henry Draper catalogue and extension