NGC 1976
Number of stars per data source
Reference 251 : 263 stars
Reference 252 : 1132 stars
Reference 269 : 17 stars
References
- 251
- Andrews A.D.
- (1972) Bol. Obs. Tonantzintla Tacubaya 6, 161
- Comparative UBVR photometry of Orion flare stars and Halpha emission-line stars
- 1972BOTT....6..161A
- 252
- Andrews A.D.
- (1974) Bol. Inst. Tonantzintla 1, 101
- Catalogue of photometric and astrometric data for 4000 stars in the Orion nebula aggregate
- 1974BITon...1..101A
- 269
- Gasparyan K.G.
- (1985) Astrophysics 21, 195
- UBV photometry of new Halpha stars in the association Orion OB1d
-