NGC 2099

Number of stars per data source

	Reference   25 :    4 stars
	Reference   39 :  108 stars
	Reference   50 :   11 stars

References

 25

Zug R.S.

(1933) Lick Obs. Bull. 16, 119

An investigation of color excess in galactic star clusters

 39

Lindblad P.-O.

(1954) Stockholms Obs. Ann. 18 no 1

On the proper motion of the cluster Messier 37

1954StoAN...1.....L

 50

Cannon A.J., Pickering E.C.

(1918-1924), Ann. Obs. Harvard Coll. Obs. 91 to 99 and 100

Henry Draper catalogue and extension