11 Lacertae

{{Starbox begin

| name=11 Lacertae

}}

{{Starbox image

| image = 300px

| caption = 11 Lacertae in optical light

}}

{{Starbox observe

| epoch=J2000

| ra={{RA|22|40|30.85848}}

| dec={{DEC|+44|16|34.7069}}

| constell=Lacerta

| appmag_v=4.46

}}

{{Starbox character

| type = red clump

| class=K2.5 III

| b-v=+1.33

| u-b=+1.36

| variable=

}}

{{Starbox astrometry

| radial_v={{Val|−10.91|0.09}}

| prop_mo_ra=+93.728

| prop_mo_dec=+10.946

| pm_footnote=

| parallax=9.317

| p_error=0.105

| parallax_footnote=

| absmag_v={{val|-0.54}}

}}

{{Starbox detail

| mass=1.38

| radius={{val|29.5|0.5}}

| luminosity={{val|279|10}}

| temperature=4,352

| metal_fe={{val|-0.2|0.02}}

| rotational_velocity=8

| gravity={{val|1.56|0.06}}

| age_gyr=3.2

}}

{{Starbox catalog

| names={{odlist | F=11 Lac | BD=+43°4266 | FK5= | HD=214868 | HIP=111944 | HR=8632 | SAO=52251 }}

}}

{{Starbox reference

| Simbad = 11+Lacertae

}}

11 Lacertae is a star in the northern constellation of Lacerta. It is visible to the naked eye as a faint orange-hued star with an apparent visual magnitude of 4.46. It lies at a distance of about 350 light years and has an absolute magnitude -0.54. The object is moving closer to the Earth with a heliocentric radial velocity of −10.9 km/s.

This is an evolved giant star with a stellar classification of K2.5 III. It is a red clump giant, meaning it is fusing helium in its core after passing through the red giant branch. The star is 3.2 billion years old with 1.38 times the mass of the Sun and has expanded to 39 times the Sun's radius. It is radiating 280 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,352 K.

References

{{reflist|refs=

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{{cite journal |bibcode=2021AJ....162..198B |title=Angular Diameters and Fundamental Parameters of Forty-four Stars from the Navy Precision Optical Interferometer |last1=Baines |first1=Ellyn K. |last2=Thomas Armstrong |first2=J. |last3=Clark |first3=James H. |last4=Gorney |first4=Jim |last5=Hutter |first5=Donald J. |last6=Jorgensen |first6=Anders M. |last7=Kyte |first7=Casey |last8=Mozurkewich |first8=David |last9=Nisley |first9=Ishara |last10=Sanborn |first10=Jason |last11=Schmitt |first11=Henrique R. |last12=Van Belle |first12=Gerard T. |journal=The Astronomical Journal |date=2021 |volume=162 |issue=5 |page=198 |doi=10.3847/1538-3881/ac2431 |doi-access=free |arxiv=2211.09030}}

{{cite journal|bibcode= 1989ApJS...71..245K |title= The Perkins catalog of revised MK types for the cooler stars |journal= Astrophysical Journal Supplement Series |volume= 71 |pages= 245 |last1= Keenan |first1= Philip C. |last2= McNeil |first2= Raymond C. |year= 1989 |doi= 10.1086/191373}}

{{cite journal|bibcode=2016A&A...588A..98M|doi=10.1051/0004-6361/201527883|arxiv=1602.00835|title=Evolved stars and the origin of abundance trends in planet hosts|journal=Astronomy and Astrophysics|volume=588|pages=A98|last1=Maldonado|first1=J.|last2=Villaver|first2=E.|last3=Niedzielski|first3=A.|year=2016|s2cid=119212009}}

{{cite journal|bibcode=2012AstL...38..331A|arxiv=1108.4971|title=XHIP: An extended hipparcos compilation|journal=Astronomy Letters|volume=38|issue=5|pages=331|last1=Anderson|first1=E.|last2=Francis|first2=Ch.|last3=Niedzielski|first3=A.|year=2012|doi=10.1134/S1063773712050015|s2cid=119257644}}

{{cite journal | display-authors=1 | last1=Famaey | first1=B. | last2=Jorissen | first2=A. | last3=Luri | first3=X. | last4=Mayor | first4=M. | last5=Udry | first5=S. | last6=Dejonghe | first6=H. | last7=Turon | first7=C. | title=Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters | journal=Astronomy and Astrophysics | volume=430 | pages=165–186 | date=2005 | doi = 10.1051/0004-6361:20041272 | bibcode = 2005A&A...430..165F |arxiv = astro-ph/0409579 | s2cid=17804304}}

{{Cite journal |last1=Soubiran |first1=C. |last2=Creevey |first2=O. L. |last3=Lagarde |first3=N. |last4=Brouillet |first4=N. |last5=Jofré |first5=P. |last6=Casamiquela |first6=L. |last7=Heiter |first7=U. |last8=Aguilera-Gómez |first8=C. |last9=Vitali |first9=S. |last10=Worley |first10=C. |last11=de Brito Silva |first11=D. |date=2024-02-01 |title=Gaia FGK benchmark stars: Fundamental Teff and log g of the third version |bibcode=2024A&A...682A.145S |journal=Astronomy and Astrophysics |volume=682 |pages=A145 |doi=10.1051/0004-6361/202347136 |arxiv=2310.11302 |issn=0004-6361}} [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/A%2BA/682/A145&HIP=HIP111o44 11 Lacertae's database entry] at VizieR.

}}

Category:K-type giants

Category:Horizontal-branch stars