NGC 1664
Number of stars per data source
Reference 37 : 179 stars
Reference 50 : 3 stars
Reference 51 : 6 stars
Reference 53 : 26 stars
References
- 37
- Larsson-Leander G.
- (1957) Stockholms Obs. Ann 20 no 2
- A study of the galactic cluster NGC 1664
- 1957StoAn..20b...1L
- 50
- Cannon A.J., Pickering E.C.
- (1918-1924), Ann. Obs. Harvard Coll. Obs. 91 to 99 and 100
- Henry Draper catalogue and extension
-
- 51
- Cannon A.J., Mayall W.M.
- 1949) Ann. Harvard Coll. Obs. 112
- Henry Draper extension 2
-
- 53
- Schwassmann A., van Rhijn P.J.
- (1935-1953) Hamburger Sternw. Bergedorf vol. 1 - 5
- Bergedorfer Spektral-Durchmusterung der 115 nordlichen Kapteynschen Eichfelder
-