NGC 2421

Number of stars per data source

	Reference  393 :    2 stars
	Reference  459 :   28 stars

393: Wramdemark S.; (1980) Astron. Astrophys. 86, 64; A study of early-type stars in an area in Puppis; 1980A&A....86...64W
459: Moffat A.F.J., Vogt N.; (1975) Astron. Astrophys. Suppl. 20, 85; Southern open star cluster. IV. UBV Hbeta photometry of 26 clusters from Monocerotis to Vela; 1975A&AS...20...85M