NGC 663

Number of stars per data source

	Reference  273 :  477 stars
	Reference  290 : 1099 stars
	Reference  438 : 2532 stars

References

 273
Pigulski A., Kopacki G., Kolaczkowski Z.
(2001) Acta Astron. 51, 159
A CCD search for variable stars of spectral B in the northern hemisphere open clusters. IV. NGC 663
2001AcA....51..159P
 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