NGC 663

Number of stars per data source

	Reference   86 : 3000 stars
	Reference  290 :  572 stars
	Reference  438 : 2319 stars

References

 86
Phelps R.L., Janes K.A.
(1994) Astrophys. J. Suppl. 90, 31
Young open cluster as probes of the star formation process. I. An atlas of open cluster photometry
1994ApJS...90...31P
 290
Pigulski A., Kopacki G., Kolaczkowski Z.
(2001) Astron. Astrophys. 376, 144
The young open cluster NGC 663 and its Be stars
2001A&A...376..144P
 438
Pandey A.K., Upadhyay K., Ogura K., Sagar R., Mohan V., Mito H., Bhatt H.C., Bhatt B.C.
(2005) Mon. Not. R. Astron. Soc. 358, 1290
Stellar contents of two young open clusters: NGC 663 and 654
2005MNRAS.358.1290P