Beta Lacertae
{{short description|G-type giant star in the constellation Lacerta}}
{{Starbox begin
| name = β Lacertae}}
{{Starbox image
| image = 295px
| caption = β Lacertae in optical light
}}
{{Starbox observe
| epoch = J2000.0
| constell = Lacerta
}}
{{Starbox character
| type = red clump
| u-b = +0.77[http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=V/50/catalog&recno=8538 HR 8538], database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID [http://vizier.u-strasbg.fr/viz-bin/Cat?V/50 V/50]. Accessed on line November 17, 2008.
}}
{{Starbox astrometry
| prop_mo_ra = {{val|−13.25|0.13}}
| prop_mo_dec = {{val|−186.77|0.13}}
| parallax = 19.19
| p_error = 0.16
}}
{{Starbox detail
| luminosity = {{val|57.7|3.0}}
| metal_fe = −0.33
| gravity = 2.43
| temperature = {{val|4803|75}}
}}
{{Starbox catalog
| names = β Lac, Beta Lacertae, Beta Lac, 3 Lacertae, 3 Lac, BD+51 3358, FK5 844, GC 31310, HD 212496, HIP 110538, HR 8538, NLTT 53741, PPM 40598, SAO 34395
}}
{{Starbox reference
| Simbad = beta+lac
}}
{{Starbox end}}
Beta Lacertae (Beta Lac, β Lacertae, β Lac) is the fourth-brightest star in the constellation of Lacerta. Based upon an annual parallax shift of 19.19 mas, it is 170 light-years distant from Earth. At that distance, the visual magnitude is diminished by an extinction factor of 0.17 due to interstellar dust.
This is an evolved G-type giant with an apparent visual magnitude of approximately 4.43. It is a red clump star and the primary component of a suspected binary system, with the pair having an angular separation of 0.2 arcsecond.
Naming
In Chinese, {{lang|zh|螣蛇}} ({{lang|zh-Latn|Téng Shé}}), meaning Flying Serpent, refers to an asterism consisting of β Lacertae, α Lacertae, 4 Lacertae, π2 Cygni, π1 Cygni, HD 206267, ε Cephei, σ Cassiopeiae, ρ Cassiopeiae, τ Cassiopeiae, AR Cassiopeiae, 9 Lacertae, 3 Andromedae, 7 Andromedae, 8 Andromedae, λ Andromedae, κ Andromedae, ι Andromedae and ψ Andromedae. Consequently, the Chinese name for β Lacertae itself is {{lang|zh|螣蛇十}} ({{lang|zh-Latn|Téng Shé shí}}, {{langx|en|the Tenth Star of Flying Serpent}}).{{in lang|zh}} [http://aeea.nmns.edu.tw/2006/0607/ap060707.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 7 日] {{Webarchive|url=https://web.archive.org/web/20110521232711/http://aeea.nmns.edu.tw/2006/0607/ap060707.html |date=2011-05-21 }}
References
{{reflist|refs=
| last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A.
| 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
| doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | postscript=.
| bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | s2cid=14878976 }}
| display-authors=1 | last1=Mishenina | first1=T. V.
| last2=Bienaymé | first2=O. | last3=Gorbaneva | first3=T. I.
| last4=Charbonnel | first4=C. | last5=Soubiran | first5=C.
| last6=Korotin | first6=S. A. | last7=Kovtyukh | first7=V. V.
| title=Elemental abundances in the atmosphere of clump giants
| journal=Astronomy and Astrophysics
| volume=456 | issue=3 | pages=1109–1120 | date=September 2006
| doi=10.1051/0004-6361:20065141 | bibcode=2006A&A...456.1109M
| arxiv=astro-ph/0605615 | s2cid=18764566 | postscript=. }}
{{cite simbad | title=bet Lac | accessdate=November 17, 2008}}
| display-authors=1 | last1=Takeda | first1=Yoichi
| last2=Sato | first2=Bun'ei | last3=Murata | first3=Daisuke
| title=Stellar Parameters and Elemental Abundances of Late-G Giants
| journal=Publications of the Astronomical Society of Japan
| date=August 2008 | volume=60 | issue=4 | pages=781–802
| bibcode=2008PASJ...60..781T | arxiv=0805.2434
| doi=10.1093/pasj/60.4.781 | s2cid=16258166 | postscript=. }}
}}
{{Stars of Lacerta}}
{{DEFAULTSORT:Beta Lacertae}}
Category:Horizontal-branch stars