HD 32667
HD 32667 is a hierarchical triple star system located about away in the southern constellation of Lepus. The brightest of the three components, and the only one visible, is a hot white subgiant star. With an apparent magnitude of 5.582, it is faintly visible by the naked eye in dark skies. In Chinese astronomy, the star was given the name Jiǔ yóu zēng qī, meaning it was the seventh star added to the asterism Jiǔ yóu in the Net mansion, when the star chart was compiled between 1744 and 1752.
The star is listed in the Catalogue of Ap, HgMn and Am Stars as an A2-type Am star designated Renson 8370, although astronomer Dorrit Hoffleit suggested the contrary, classing it as an A3 weak-line star.
Stellar companions
HD 32667 Ab
Radial velocity variations were reported as early as 1930, indicating the existence of an unresolved companion orbiting close to the primary star. The 1991 edition of the Bright Star Catalogue lists HD 32667 as a spectroscopic binary. However, this secondary star would remain hardly studied, with existing measurements being of "very bad" quality. In 2019, rough constraints were made on the nature of the secondary, namely that it does not weigh more than 1.44, has either a highly eccentric 46-day orbit or a 4-day orbit with an indeterminate eccentricity, and has a substantial magnitude difference with the brighter primary. Further research is needed to determine its precise characteristics.
HD 32667 B
A distant red dwarf companion revolving around the inner binary was discovered in 2019 from data collected by the Gemini Planet Imager. The discovery paper described it as a 110.3 ultra-cool dwarf with a spectral type of M8, located at a separation of 0.533" from the inner binary. A 2023 study presented a semi-major axis of, a substantially higher mass of 0.21, and a spectral type of M4V.