| absmag_v = −0.65[12]
}}{{Starbox detail
| mass = {{nowrap|3.5 ± 0.1}}[13]
| temperature = {{nowrap|5,450 ± 100}}[13]
| gravity = {{nowrap|2.60 ± 0.03}}[13]
| metal_fe = +0.05[16]
| luminosity = 171[17]
| radius = 16[18]
| rotational_velocity = 11[19]
| age_myr = 240[13]
}}{{Starbox catalog
| names = Nihal, β Lep, Beta Leporis, Beta Lep, 9 Leporis, 9 Lep, BD−20 1096, FK5 204, GC 6762, HD 36079, HIP 25606, HR 1829, PPM 248938, SAO 170457, WDS 05282-2046A.[4]
}}{{Starbox reference
| Simbad=beta+lep
}}{{Starbox end}}Beta Leporis (β Leporis, abbreviated Beta Lep, β Lep), also named Nihal,[1] is the second brightest star in the constellation of Lepus.[18]Nomenclature
Beta Leporis is the star's Bayer designation. It is also known by the traditional named Nihal, Arabic for "quenching their thirst". The occasional spelling Nibal appears to be due to a misreading.[24] In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[2] to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016[3] included a table of the first two batches of names approved by the WGSN; which included Nihal for this star.
In Chinese, {{lang|zh|廁}} ({{lang|zh-Latn|Cè}}), meaning Toilet, refers to an asterism consisting of β Leporis, α Leporis, γ Leporis and δ Leporis.[4] Consequently, β Leporis itself is known as {{lang|zh|廁二}} ({{lang|zh-Latn|Cè èr}}), "the Second Star of Toilet".[5]
Properties
Based on parallax measurements from the Hipparcos astrometry satellite,[29] this star is located about {{Convert|160|ly|pc|abbr=off|lk=on}} from the Earth. It has an apparent visual magnitude of 2.84 and a stellar classification of G5 II. The mass of this star is 3.5 times the mass of the Sun and it is about 240 million years old,[13] which is sufficient time for a star this massive to consume the hydrogen at its core and evolve away from the main sequence, becoming a G-type bright giant.[4]
This is a double star system and may be a binary. Using adaptive optics on the AEOS telescope at Haleakala Observatory, the pair was found to be separated by an angle of 2.58 arcseconds at a position angle of 1.4°.[32] Component B has been observed to fluctuate in brightness and is catalogued as suspected variable star NSV 2008.
[33]References
1. ^{{cite web | url=http://www.pas.rochester.edu/~emamajek/WGSN/IAU-CSN.txt | title=IAU Catalog of Star Names |accessdate=28 July 2016}}
2. ^{{cite web | url=https://www.iau.org/science/scientific_bodies/working_groups/280/ | title=IAU Working Group on Star Names (WGSN)|accessdate=22 May 2016}}
3. ^{{cite web | url=http://www.pas.rochester.edu/~emamajek/WGSN/WGSN_bulletin1.pdf | title=Bulletin of the IAU Working Group on Star Names, No. 1 |accessdate=28 July 2016}}
4. ^{{zh icon}} 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, {{ISBN|978-986-7332-25-7}}.
5. ^{{zh icon}} 香港太空館 - 研究資源 - 亮星中英對照表 {{webarchive|url=https://web.archive.org/web/20081025110153/http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/c_research_chinengstars_ala_alz.htm |date=2008-10-25 }}, Hong Kong Space Museum. Accessed on line November 23, 2010.
6. ^1 {{citation | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | postscript=. }}
7. ^1 {{citation | last1=Evans | first1=D. S. | contribution=The Revision of the General Catalogue of Radial Velocities | title= Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 held at the University of Toronto 20-24 June, 1966 | editor1-first=Alan Henry | editor1-last=Batten | editor2-first=John Frederick | editor2-last=Heard | publisher=Academic Press, London | page=57 | bibcode=1967IAUS...30...57E }}
8. ^1 {{citation | last1=Luck | first1=R. Earle | last2=Wepfer | first2=Gordon G. | title=Chemical Abundances for F and G Luminosity Class II Stars | journal=Astronomical Journal | volume=110 | page=2425 |date=November 1995 | doi=10.1086/117702 | bibcode=1995AJ....110.2425L }}
9. ^1 {{cite journal | author=Bernacca, P. L. | author2=Perinotto, M. | title=A catalogue of stellar rotational velocities | journal=Contributi Osservatorio Astronomico di Padova in Asiago | volume=239 | issue=1 | date=1970 | bibcode=1970CoAsi.239....1B }}
10. ^1 2 3 {{cite journal | display-authors=1 | last1=Johnson | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | date=1966 | bibcode=1966CoLPL...4...99J }}
11. ^1 {{citation | last=Perryman | first=Michael | title=The Making of History's Greatest Star Map | location=Heidelberg | publisher=Springer-Verlag | date=2010 | doi=10.1007/978-3-642-11602-5}}
12. ^1 {{citation | last1=Roberts | first1=Lewis C., Jr. | title=Astrometric and photometric measurements of binary stars with adaptive optics: observations from 2002 | journal=Monthly Notices of the Royal Astronomical Society | volume=413 | issue=2 | pages= 1200–1205 |date=May 2011 | doi=10.1111/j.1365-2966.2011.18205.x | bibcode=2011MNRAS.413.1200R |arxiv = 1012.3383 }}
13. ^1 2 3 4 5 {{citation | display-authors=1 | last1=Lyubimkov | first1=Leonid S. | last2=Lambert | first2=David L. | last3=Rostopchin | first3=Sergey I. | last4=Rachkovskaya | first4=Tamara M. | last5=Poklad | first5=Dmitry B. | title=Accurate fundamental parameters for A-, F- and G-type Supergiants in the solar neighbourhood | journal=Monthly Notices of the Royal Astronomical Society | volume=402 | issue=2 | pages=1369–1379 |date=February 2010 | doi=10.1111/j.1365-2966.2009.15979.x | bibcode=2010MNRAS.402.1369L |arxiv = 0911.1335 }}
14. ^1 {{citation | last1=Mallik | first1=Sushma V. | title=Lithium abundance and mass | journal=Astronomy and Astrophysics | volume=352 | pages=495–507 |date=December 1999 | bibcode=1999A&A...352..495M }}
15. ^1 2 3 {{citation | title=CCDM J05283-2046AB -- Double or multiple star | work=SIMBAD | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Beta+Leporis | accessdate=2011-12-27 }}
16. ^1 {{citation | title=NSV 2008, database entry | work=New Catalogue of Suspected Variable Stars, the improved version | publisher=Sternberg Astronomical Institute | location=Moscow, Russia. | url=http://www.sai.msu.su/groups/cluster/gcvs/gcvs/nsv/nsv.dat | accessdate=2008-11-18 }}
17. ^1 HR 1829, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line November 18, 2008.
18. ^1 {{citation | pages=265, 269 | url=https://books.google.com/books?id=5xQuAAAAIAAJ | title=Star-names and Their Meanings | first1=Richard Hinckley | last1=Allen | location=New York | publisher=G. E. Steichert | date=1899 }}
19. ^1 2 {{citation | url=http://www.astro.uiuc.edu/~kaler/sow/nihal.html | title=Nihal | work=Stars | first1=James B. | last1=Kaler | accessdate=2008-11-18 | deadurl=yes | archiveurl=https://web.archive.org/web/20081210154831/http://www.astro.uiuc.edu/~kaler/sow/nihal.html | archivedate=2008-12-10 | df= }}