39 Arietis
{{Short description|Star in the constellation Aries}}
{{Starbox begin
| name = 39 Arietis
}}
{{Starbox image
| image = 250px
| caption = 39 Arietis in optical light
}}
{{Starbox observe
| epoch = J2000
| constell = Aries
| dec = {{DEC|+29|14|49.6132}}
}}
{{Starbox character
| type = red clump
| r-i = 0.58
| v-r =
| variable =
}}
{{Starbox astrometry
| radial_v = {{val|−15.53|0.14}}
| prop_mo_ra = {{val|+149.47|0.25}}
| prop_mo_dec = {{val|−127.05|0.18}}
| parallax = 19.01
| p_error = 0.21
| absmag_v =
}}
{{Starbox detail
| luminosity = {{val|48.7|0.7}}
| temperature = {{val|4768|167|fmt=commas}}
| age_gyr =
}}
{{Starbox catalog
| names= Lilii Borea, BD+28°462, HD 17361, HIP 13061, HR 824, SAO 75578.
}}
{{Starbox reference
|Simbad=39+Ari
}}
{{Starbox end}}
39 Arietis (abbreviated 39 Ari), officially named Lilii Borea {{IPAc-en|ˈ|l|ɪ|l|i|aɪ|_|ˈ|b|ɔər|i|ə}},{{cite web | url=https://www.iau.org/public/themes/naming_stars/ | title=Naming Stars |publisher=IAU.org |access-date=16 December 2017}} is a star in the northern constellation of Aries. It is visible to the naked eye with an apparent visual magnitude of +4.5. The distance to this star, as determined from an annual parallax shift of 19.01 mas, is approximately {{Convert|172|ly|pc|abbr=off|lk=on}}.
This star was formerly located in the obsolete constellation Musca Borealis.
Nomenclature
39 Arietis is the star's Flamsteed designation.
This star was described as Lilii Borea by Nicolas-Louis de Lacaille in 1757,{{cite book |first=Nicolas-Louis |last=de Lacaille |title=Astronomiae fundamenta novissimis solis et stellarum observationibus stabilita, Lutetiae in Collegio mazarineo et in Africa ad caput Bonae Spei peractis a Nicolao Ludovico de La Caille |url=https://books.google.com/books?id=LXm0RAf6fk0C |publisher=J.-J.-St. Collombat |date=1757 |pages=227, 233}}{{cite book |first=Francis |last=Baily |title=La Caille's Catalogue of 398 principal Stars, Memoirs of the Royal Astronomical Society, Vol 5 |url=https://books.google.com/books?id=1l9dAAAAcAAJ |publisher=Priestley and Weale |date=1833 |pages=110, 121}}
as a star of the now-defunct constellation of Lilium (the Lily). The words are simply the Latin phrase Līliī Boreā 'in the north of Lilium'. Līliī Austrīnā {{IPAc-en|ɔː|ˈ|s|t|r|aɪ|n|ə}} 'in the south of Lilium' was 41 Arietis.
In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN){{cite web | url=https://www.iau.org/science/scientific_bodies/working_groups/280/ | title=IAU Working Group on Star Names (WGSN)|access-date=22 May 2016}} to catalog and standardize proper names for stars. The WGSN approved the name Lilii Borea for this star on 5 September 2017 and it is now so included in the List of IAU-approved Star Names.
In Chinese, {{lang|zh|胃宿}} ({{lang|zh-Latn|Wèi Su}}), meaning Stomach, refers to an asterism consisting of 39 Arietis, 35 Arietis and 41 Arietis.{{in lang|zh}} 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}}. Consequently, the Chinese name for 39 Arietis itself is {{lang|zh|胃宿二}} ({{lang|zh-Latn|Wèi Su èr}}, {{langx|en|the Second Star of Stomach}}).{{in lang|zh}} 白羊座
Properties
39 Arietis is a giant star with a stellar classification of K1.5 III. It is currently at an evolutionary stage known as the red clump, indicating that it is generating energy through the fusion of helium at its core. It has 1.6 times the mass of the Sun, but its outer envelope has expanded to around 10 times the Sun's radius. It shines with 49 times the luminosity of the Sun. This energy is being radiated into outer space from its outer atmosphere at an effective temperature of 4,768 K, giving it the cool orange-hued glow of a K-type star.
See also
References
{{reflist|refs=
{{citation | display-authors=1 | last1=Tautvaišienė | first1=G. | last2=Edvardsson | first2=B. | last3=Puzeras | first3=E. | last4=Barisevičius | first4=G. | last5=Ilyin | first5=I. | title=C, N and O abundances in red clump stars of the Milky Way | journal=Monthly Notices of the Royal Astronomical Society | volume=409 | issue=3 | pages=1213–1219 | doi=10.1111/j.1365-2966.2010.17381.x | bibcode=2010MNRAS.409.1213T | postscript=. |arxiv = 1007.4064 |date=December 2010| doi-access=free | s2cid=119182458 }}
{{cite simbad | title=* 39 Ari | access-date=2012-07-18 }}
{{citation|title=The Colour of Stars |date=December 21, 2004 |work=Australia Telescope, Outreach and Education |publisher=Commonwealth Scientific and Industrial Research Organisation |url=http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html |access-date=2012-01-16 |archive-url=https://web.archive.org/web/20120222183238/http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html |archive-date=February 22, 2012 }}
}}
External links
- [http://aladin.u-strasbg.fr/AladinPreview?-c=02+47+54.5407%2B29+14+49.625&ident=NLTT++8982&submit=Aladin+previewer Aladin previewer]
- [http://aladin.u-strasbg.fr/java/nph-aladin.pl?script=get+Aladin+NLTT++8982+11arcmin%3Bget+simbad+NLTT++8982+11arcmin&from=Simbad4&submit=Aladin+applet Aladin sky atlas]
- [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%20824 HR 824]
{{Stars of Aries}}
{{Portal bar|Astronomy|Stars|Outer space}}
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Category:Horizontal-branch stars