Beta Lacertae

---

title: "Beta Lacertae" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["g-type-giants", "horizontal-branch-stars", "lacerta", "bayer-objects", "durchmusterung-objects", "flamsteed-objects", "henry-draper-catalogue-objects", "hipparcos-objects", "bright-star-catalogue-objects"] description: "G-type giant star in the constellation Lacerta" topic_path: "science/astronomy" source: "https://en.wikipedia.org/wiki/Beta_Lacertae" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary G-type giant star in the constellation Lacerta ::

| name = β Lacertae | image = |image=Lacerta constellation map.svg|alt=|float=center|width=240 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=β Lacertae |x=530|y=480 | caption = Location of β Lacertae (circled in red) | epoch = J2000.0 | constell = Lacerta | ra = | dec = | appmag_v=4.43 | type = red clump | class = G8 III | u-b = +0.77 | b-v = +1.02 | v-r = 0.6 | r-i = +0.57 | radial_v = −10.4 ± 0.9 | prop_mo_ra = | prop_mo_dec = | parallax = 19.19 | p_error = 0.16 | parallax_footnote = | absmag_v= +0.67 | source = | mass = | radius = | luminosity = | metal_fe = −0.33 | gravity = 2.43 | temperature = | rotational_velocity = | age_gyr = | 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 | Simbad = beta+lac

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.

::figure[src="https://upload.wikimedia.org/wikipedia/commons/d/de/Beta_Lacertae.jpg" caption="β Lacertae in optical light"] ::

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, 螣蛇 (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 螣蛇十 (Téng Shé shí, ).

References

| 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=. }}

| 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=. }}

References

1. CDS]] ID [http://vizier.u-strasbg.fr/viz-bin/Cat?V/50 V/50]. Accessed on line November 17, 2008.
2. {{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. link. (2011-05-21)
3. (2018). "Fundamental Parameters of 87 Stars from the Navy Precision Optical Interferometer". The Astronomical Journal.
4. "bet Lac".
5. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics.

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::