Haffner 18
Number of stars per data source
Reference 233 : 33 stars
References
233
FitzGerald P.M., Moffat A.F.J.
(1974) Astron. J. 79, 873
Puppis clusters Haffner 19 and 18ab and the 15 kiloparsec arm(?)
1974AJ.....79..873F