NGC 1663

Number of stars per data source

	Reference  336 :  133 stars

References

 336

Alksnis A.

(1958) Trudy Astrofiz. Lab. Riga 7,33

Determination of size, color indices, and spectral classes of stars in an area centered on R.A.=21h24m, Dec=+58.5deg

1958TrRig...7...33A