HD 32667
{{use dmy dates|date=September 2024}}
{{short description|A-type star in the constellation Lepus}}
{{Starbox begin}}
{{Starbox image
| image=
{{Location mark
|image=Lepus constellation map.svg|alt=|float=center|width=280
|label=|position=right
|mark=Red circle.svg|mark_width=10|mark_link=HD 32667
|x=787|y=740
}}
|caption=Location of HD 32667 (circled)
}}
{{Starbox observe
|epoch=J2000
|constell=Lepus
}}
{{Starbox character
|variable=
}}
{{Starbox astrometry
|parallax=16.9975
|p_error=0.0397
|absmag_v=
}}
{{Starbox orbit
|primary=HD 32667 Aa
|name=HD 32667 Ab
|period_unitless=~4 or ~46 d
|axis=
|axis_unitless=
|inclination=
|node=
|periastron=
|eccentricity=unknown, possibly ~0.8
|periarg=
|k1=
|k2=
}}
{{Starbox orbit
|primary=HD 32667 A
|name=HD 32667 B
|period_unitless=
|axis={{val|0.5329|0.0013}}
|axis_unitless=2808 AU
|eccentricity=
|inclination={{val|71|24|25}}
|node=
|periastron=
|periarg=
|k1=
|k2=
}}
{{Starbox detail
|component1=HD 32667 Aa
|rotational_velocity=117.17 ± 2.48
|component2=HD 32667 Ab
}}
{{Starbox detail|no_heading=y
|component1=HD 32667 B
|mass={{val|0.1053|0.0019|0.0022}}, 0.21
|mass_mj=
|luminosity={{val|0.000933|0.000067|0.000062}}
}}
{{Starbox catalog
|names={{odlist|2MASS=J05035326-2423174|CD=-24°2795|GC=6195|GSC=06477-01294|HD=32667|HIP=23554|HR=1645|PPM=248396|SAO=170029|TIC=13071322|TYC=6477-1294-1|Gaia DR3=2960561059245715968}}, Renson 8370, 10 G Leporis
}}
{{Starbox reference
|Simbad=HD+32667|sn=HD 32667
}}
{{Starbox end}}
HD 32667 is a hierarchical triple star system located about {{convert|192|ly|pc}} 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 ({{lang-zh|c=九斿增七|l=Nine flag addition seven}}), meaning it was the seventh star added to the asterism Jiǔ yóu ({{lang-zh|c=九斿|labels=no}}, "Imperial Military Flag") in the Net mansion, when the star chart {{ill|Yixiang Kaocheng|zh|仪象考成}} ({{lang-zh|c=仪象考成|labels=no}}) 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 (HD 32667 Ab) orbiting close to the primary star. The 1991 edition of the Bright Star Catalogue lists HD 32667 (HR 1645) 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 {{Solar mass}}, has either a highly eccentric (e~0.8) 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 (Aa/Ab) was discovered in 2019 from data collected by the Gemini Planet Imager. The discovery paper described it as a 110.3 {{Jupiter mass}} (0.1053 {{Solar mass}}) 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 {{convert|2,808|AU|km|abbr=on}}, a substantially higher mass of 0.21 {{Solar mass}}, and a spectral type of M4V.
References
{{reflist|refs=
{{cite simbad |title=HD 32667 |access-date=2024-08-08}}
{{cite magazine|script-title=zh:星宿爭霸戰|lang=zh|trans-title=Battle of the Stars|last=Auyang|first=Liang|pages=22–27|magazine=Taipei Skylight|publisher=Taipei Astronomical Museum|issn=1727-0022|date=30 August 2020|volume=97|url=https://www-ws.gov.taipei/Download.ashx?u=LzAwMS9VcGxvYWQvNDM5L2NrZmlsZS8yYjdkNDJlMC0yMjQ3LTRiMmUtODZhZC05MzgwZWExMzRiNWQucGRm&n=bm85N3AyMi0yNyDmmJ%2flrr%2fniK3pnLjmiLBzLnBkZg%3d%3d&icon=.pdf|access-date=8 September 2024}}
{{cite web|title=VizieR Correlated Data from III/260/notes|publisher=Centre de données astronomiques de Strasbourg|url=https://vizier.cds.unistra.fr/viz-bin/VizieR?-6N&-out.form=H0&//%2A&-source%3DIII/260/notes&Seq%3D8370|archive-url=https://web.archive.org/web/20240911022904/https://vizier.cds.unistra.fr/viz-bin/VizieR?-6N&-out.form=H0&//%2A&-source%3DIII/260/notes&Seq%3D8370|access-date=11 September 2024|archive-date=11 September 2024}}
}}
{{Stars of Lepus}}
Category:M-type main-sequence stars