Nu Leporis
{{Short description|Star in the constellation Lepus}}
{{Starbox begin
| name = Nu Leporis
}}
{{Starbox observe
| epoch = J2000.0
| constell = Lepus
| dec = {{DEC|−12|18|56.1139}}
}}
{{Starbox character
| class = B7/8 V or B7 IVnn
| variable =
}}
{{Starbox astrometry
| radial_v = {{Val|+16.0|7.4}}
| parallax = 9.78
| p_error = 0.37
}}
{{Starbox detail
| source =
| gravity =
| metal_fe =
| age_myr =
}}
{{Starbox catalog
| names = {{odlist | B=ν Lep | F=7 Lep | BD=−12° 1132 | FK5=2380 | HD=34863 | HIP=24873 | HR=1757 | SAO=150345 | GC=6538 }}
}}
{{Starbox reference
| Simbad =nu.+Lep
}}
{{Starbox end}}
Nu Leporis, Latinized from ν Leporis, is a probable astrometric binary star system in the constellation Lepus. It is visible to the naked eye as a faint star with an apparent visual magnitude of 5.29. Based upon an annual parallax shift of 7.70 mas as seen from the Earth, it is 420 light years from the Sun.
The visible component is a B-type star with an estimated 3.3 times the mass of the Sun. Lesh (1968) gave a stellar classification of B7 IVnn, which would indicate this is a somewhat evolved subgiant star. The 'nn' notation indicates especially "nebulous" absorption lines caused by rapid rotation. Houk and Smith-Moore (1978) listed it as B7/8 V, suggesting this is instead a B-type main sequence star that has not yet consumed all the hydrogen at its core.
Nu Leporis is spinning rapidly with a projected rotational velocity of 285 km/s. The star has a radius about three times that of the Sun and is radiating 138 times the Sun's luminosity from its photosphere at an effective temperature of 12,417 K.
References
{{reflist|refs=
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| volume=474 | issue=2 | pages=653–664 | date=2007
| arxiv=0708.1752 | bibcode=2007A&A...474..653V
| doi=10.1051/0004-6361:20078357 | s2cid=18759600 | postscript=. }}
| title=XHIP: An extended hipparcos compilation
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| volume=38 | issue=5 | pages=331 | year=2012
| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015
| arxiv=1108.4971 | s2cid=119257644 | postscript=. }}
| title=Rotational Velocities of B Stars
| journal=The Astrophysical Journal
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| postscript=.
| bibcode=2002ApJ...573..359A | doi=10.1086/340590 | doi-access=free }}
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| title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)
| edition=Third | journal=Astronomy and Astrophysics
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| arxiv=astro-ph/0012289 | s2cid=425754 | postscript=. }}
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| title=A catalogue of multiplicity among bright stellar systems
| journal=Monthly Notices of the Royal Astronomical Society
| volume=389 | issue=2 | pages=869–879 | date=September 2008
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| arxiv=0806.2878 | s2cid=14878976 | postscript=. }}
| last=Lesh | first=Janet Rountree | postscript=.
| title=The Kinematics of the Gould Belt: an Expanding Group?
| journal=Astrophysical Journal Supplement
| volume=17 | page=371 | date=December 1968
| doi=10.1086/190179 | bibcode=1968ApJS...17..371L | doi-access=free }}
| last1=Houk | first1=Nancy | last2=Smith-Moore | first2=M.
| title=Michigan catalogue of two-dimensional spectral types for the HD stars
| volume=4 | publication-place=Ann Arbor | year=1978
| publisher=Dept. of Astronomy, University of Michigan
| bibcode=1988mcts.book.....H | postscript=. }}
| display-authors=1 | last1=Crawford | first1=D. L.
| last2=Barnes | first2=J. V. | last3=Golson | first3=J. C.
| title=Four-color, H-beta, and UBV photometry for bright B-type stars in the northern hemisphere
| journal=The Astronomical Journal
| year=1971 | pages=1058 | volume=76
| bibcode=1971AJ.....76.1058C | doi=10.1086/111220
| postscript=. }}
| last1=de Bruijne | first1=J. H. J. | last2=Eilers | first2=A.-C.
| title=Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project
| journal=Astronomy & Astrophysics
| volume=546 | id=A61 | pages=14 | date=October 2012
| doi=10.1051/0004-6361/201219219 | bibcode=2012A&A...546A..61D
| arxiv=1208.3048 | s2cid=59451347 | postscript=. }}
| last1=Zorec | first1=J. | last2=Royer | first2=F.
| title=Rotational velocities of A-type stars. IV. Evolution of rotational velocities
| journal=Astronomy & Astrophysics
| volume=537 | page=A120 | date=January 2012
| doi=10.1051/0004-6361/201117691 | bibcode=2012A&A...537A.120Z
| arxiv=1201.2052 | s2cid=55586789 | postscript=. }}
| title=nu. Lep | accessdate=2017-08-18 | postscript=. }}
}}
{{Stars of Lepus|state=collapsed}}
{{DEFAULTSORT:Nu Leporis}}
Category:B-type main-sequence stars
Category:Lepus (constellation)