HD 223960 is tentatively classified as anα Cygni variable; its brightness changes erratically by less than a tenth of a magnitude with a primary period of about two days.[11] It is a hot supergiant star with a luminosity several hundred thousand times higher thanthe Sun's.
^abNegueruela, I.; Simón-Díaz, S.; De Burgos, A.; Casasbuenas, A.; Beck, P. G. (2024). "The IACOB project: XII. New grid of northern standards for the spectral classification of B-type stars".Astronomy and Astrophysics.690.arXiv:2407.04163.Bibcode:2024A&A...690A.176N.doi:10.1051/0004-6361/202449298.
^Samus', N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (2017). "General catalogue of variable stars: Version GCVS 5.1".Astronomy Reports.61 (1): 80.Bibcode:2017ARep...61...80S.doi:10.1134/S1063772917010085.
^Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities".Carnegie Institute Washington D.C. Publication.Bibcode:1953GCRV..C......0W.
^abcdVerdugo, E.; Talavera, A.; Gómez De Castro, A. I. (1999). "Understanding A-type supergiants. II. Atmospheric parameters and rotational velocities of Galactic A-type supergiants".Astronomy and Astrophysics.346: 819.Bibcode:1999A&A...346..819V.
