HD 98176

HD 98176, also designated as HIP 55133 and rarely 22 G. Centauri, is a solitary, white hued star located in the southern constellation Centaurus. It has an apparent magnitude of 6.44,^[2] placing it near the limit for naked eye visibility. Based on parallax measurements from Gaia DR3, the object is estimated to be 348 light years distant.^[1] At its current distance, its brightness is diminished by 0.32 magnitudes due to interstellar dust.^[13] Pauzen et al. (2001) lists it as a potential λ Boötis star.^[14]

This is an ordinary A-type main-sequence star with a stellar classification of A0 V.^[3] Pauzen et al. (2001) gives it a slightly cooler class of A1 Vn,^[14] which includes broad absorption lines due to rapid rotation. It has 2.5 times the mass of the Sun^[6] and double its radius.^[7] It radiates 28.3 times the luminosity of the Sun^[8] from its photosphere at an effective temperature of 9,774 K.^[6] Based on parameters derived from extinction in the Gaia passband, HD 98176 has an iron abundance 19% below solar levels.