NGC 1857

Number of stars per data source

	Reference  476 :  480 stars
	Reference  516 :  320 stars

References

 476
Sujatha S., Babu G.S.D., Ananthamurthy S.
(2006) Bull. Astr. Soc. India 34, 357
Mass function of open clusters NGC 1857 and Czernik 25
2006BASI...34..357S
 516
Colegrove P.T.
(1999) Thesis (PhD). University of Nevada, Reno
Open cluster ages and an apparent periodicity in the history of star formation in the solar neighborhood
1999PhDT.......164C