Gamma1 Octantis

{{Short description|Yellow-hued giant star in the constellation Octans}}

{{DISPLAYTITLE:Gamma¹ Octantis}}

{{other stars by Bayer designation|Gamma Octantis{{!}}γ Octantis}}

{{Starbox begin

| name = γ¹ Octantis

}}

{{Starbox image

|image=

{{Location mark

|image=Octans constellation map.svg|alt=|float=center|width=280

|label=|position=right

|mark=Red circle.svg|mark_width=10|mark_link=Gamma¹ Octantis

|x=350|y=552

}}

|caption=Location of γ¹ Octantis (circled)

}}

{{Starbox observe

| epoch = J2000

| constell = Octans

| ra = {{RA|23|52|06.47318}}

| dec = {{DEC|-82|01|07.7636}}

| appmag_v = 5.10{{cite journal | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | title=XHIP: An extended hipparcos compilation | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | s2cid=119257644 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=V/137D/XHIP&HIP=117689 Vizier catalog entry]

}}

{{Starbox character

| type = red clump{{cite journal | bibcode=2008AstL...34..785G | doi=10.1134/S1063773708110078 | arxiv=1607.00619 | title=Red giant clump in the Tycho-2 catalogue | journal=Astronomy Letters | volume=34 | issue=11 | pages=785–796 | year=2009 | last1=Gontcharov | first1=G. A. | s2cid=73524157 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/PAZh/34/868/table&HIP=117689 Vizier catalog entry]

| class = G7III{{cite journal | bibcode=1995yCat.5050....0H | title=VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991) | journal=VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H | volume=5050 | last1=Hoffleit | first1=D. | last2=Warren | first2=W. H. | year=1995 }}

| b-v = +0.92{{cite journal | bibcode=2014JAVSO..42..443M | title=Sloan Magnitudes for the Brightest Stars | journal=The Journal of the American Association of Variable Star Observers | volume=42 | pages=443 | last1=Mallama | first1=A. | year=2014 | issue=2 }}[http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/other/JAVSO/42.443/ugriz&HD=223647 Vizier catalog entry]

| u-b = +0.60

}}

{{Starbox astrometry

| radial_v = {{Val|+15.4|0.1}}{{Cite journal | doi=10.1134/S1063773706110065 | bibcode=2006AstL...32..759G| title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system| journal=Astronomy Letters| volume=32| issue=11| pages=759–771| year=2006| last1=Gontcharov| first1=G. A.|arxiv = 1606.08053 | s2cid=119231169}}

| prop_mo_ra = −45.670

| prop_mo_dec = −15.666

| parallax = 12.1790

| p_error = 0.0552

| parallax_footnote = {{cite Gaia DR3|6350681790832883840}}

| absmag_v = 0.55

}}

{{Starbox detail

| mass = 1.81{{cite journal | bibcode=1999A&A...352..555A | arxiv=astro-ph/9911002 | title=Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures | journal=Astronomy and Astrophysics | volume=352 | pages=555–562 | last1=Allende Prieto | first1=C. | last2=Lambert | first2=D. L. | year=1999 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/A%2bA/352/555/table1&Name=HIP117689 Vizier catalog entry]

| radius = 10.3

| temperature = 5,017

| luminosity = 60{{cite journal |bibcode=2023ApJS..268....4F |title=Variability Catalog of Stars Observed during the TESS Prime Mission |last1=Fetherolf |first1=Tara |last2=Pepper |first2=Joshua |last3=Simpson |first3=Emilie |last4=Kane |first4=Stephen R. |last5=Močnik |first5=Teo |last6=English |first6=John Edward |last7=Antoci |first7=Victoria |last8=Huber |first8=Daniel |last9=Jenkins |first9=Jon M. |last10=Stassun |first10=Keivan |last11=Twicken |first11=Joseph D. |last12=Vanderspek |first12=Roland |last13=Winn |first13=Joshua N. |journal=The Astrophysical Journal Supplement Series |date=2023 |volume=268 |issue=1 |page=4 |doi=10.3847/1538-4365/acdee5 |doi-access=free |arxiv=2208.11721 }}

| rotational_velocity = 1.8{{cite journal | bibcode=2014A&A...561A.126D | doi=10.1051/0004-6361/201220762 | arxiv=1312.3474 | title=A catalog of rotational and radial velocities for evolved stars | journal=Astronomy & Astrophysics | volume=561 | pages=A126 | year=2014 | last1=De Medeiros | first1=J. R. | last2=Alves | first2=S. | last3=Udry | first3=S. | last4=Andersen | first4=J. | last5=Nordström | first5=B. | last6=Mayor | first6=M. | s2cid=54046583 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/A%2bA/561/A126/table1&HD=223647 Vizier catalog entry]

| gravity = 2.64

| metal_fe = −0.34{{cite journal | bibcode=2016A&A...591A.118S | doi=10.1051/0004-6361/201628497 |arxiv=1605.07384 | title=The PASTEL catalogue: 2016 version | journal=Astronomy & Astrophysics | volume=591 | pages=A118 | year=2016 | last1=Soubiran | first1=Caroline | last2=Le Campion | first2=Jean-François | last3=Brouillet | first3=Nathalie | last4=Chemin | first4=Laurent | s2cid=119258214 }}

}}

{{Starbox catalog

| names = {{odlist | B=γ¹ Oct | CPD=−82°905 | FK5=3997 | HD=223647 | HIP=117689 | HR=9032 | SAO=258989 | GC=33107 | Gould = 86 G. Octantis }}{{Cite simbad|title=HD 223647|access-date= 7 June 2022}}{{cite journal | last=Gould | first=Benjamin Apthorp | title=Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas | journal=Resultados del Observatorio Nacional Argentino | volume=1 | bibcode=1879RNAO....1.....G | year=1878 | page=}}

}}

{{Starbox reference

| Simbad = Gamma1+Octantis

}}

{{Starbox end}}

Gamma¹ Octantis, Latinized from γ¹ Octantis, is a single,{{cite journal | 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 | bibcode=2008MNRAS.389..869E |arxiv = 0806.2878 | s2cid=14878976 }} yellow-hued star in the constellation which includes the southern celestial pole, Octans. Its apparent visual magnitude is 5.10, meaning that in good conditions it is bright enough to be faintly visible to the naked eye.