Hogg 22

Number of stars per data source

	Reference   82 :    3 stars
	Reference  190 :    1 star
	Reference  479 :    2 stars

References

 82
Moffat A.F.J., Vogt N.
(1973) Astron. Astrophys. Suppl. 10, 135
Southern open star clusters III. UBV Hbeta photometry of 28 clusters between galactic longitudes 297 and 353
1973A&AS...10..135M
 190
Klare G., Neckel T.
(1977) Astron. Astrophys. Suppl. 27, 215
UBV Hbeta and polarization measurements of 1660 southern OB stars
1977A&AS...27..215K
 479
Kaltcheva N.T., Georgiev L.N.
(1992) Monthly Notices Roy. Astron. Soc. 259, 166
Stromgren and HBeta photometry of OB associations and open clusters - I. Ara OB1
1992MNRAS.259..166K