HD 121228 is a
blue supergiant star located in the constellation
Centaurus. The star is noted for its close visual proximity to the planetary nebula
SuWt 2.[9]
^Zacharias, N.; Finch, C. T.; Girard, T. M.; Henden, A.;
Bartlett, J. L.; Monet, D. G.; Zacharias, M. I. (2012). "VizieR Online Data Catalog: UCAC4 Catalogue (Zacharias+, 2012)". VizieR On-line Data Catalog.
Bibcode:
2012yCat.1322....0Z.
^Houk, Nancy (1975). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 1. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan.
Bibcode:
1975MSS...C01....0H.
^Westin, T. N. G. (1985). "The local system of early type stars. Spatial extent and kinematics". Astronomy and Astrophysics Supplement Series. 60: 99.
Bibcode:
1985A&AS...60...99W.