Haffner 20

Number of stars per data source

	Reference  166 :   33 stars

References

 166

Fitzgerald M.P., Moffat A.F.J.

(1974) Publ. Astron. Soc. Pacific 86, 480

Haffner 20 and 21, two moderately old open clusters in Puppis

1974PASP...86..480F