Delta Octantis

{{Short description|Star in the constellation Octans}}

{{Starbox begin

| name = δ 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=Delta Octantis

|x=730|y=930

}}

|caption=Location of δ Octantis (circled)

}}

{{Starbox observe

| epoch = J2000

| constell = Octans

| ra = {{RA|14|26|55.23244}}{{cite journal | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | year=2007 | last1=Van Leeuwen | first1=F. | s2cid=18759600 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-S?HIP%2070638 Vizier catalog entry]

| dec = {{DEC|-83|40|04.3868}}

| appmag_v = 4.31{{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=70638 Vizier catalog entry]

}}

{{Starbox character

| class = K2III{{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 = +1.31{{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=124882 Vizier catalog entry]

| u-b = +1.45

}}

{{Starbox astrometry

| radial_v = +4.60{{cite journal | arxiv=1410.6422 | bibcode=2015A&A...574A..50J | doi=10.1051/0004-6361/201424474 | title=Stellar parameters and chemical abundances of 223 evolved stars with and without planets | journal=Astronomy & Astrophysics | volume=574 | pages=A50 | year=2015 | last1=Jofré | first1=E. | last2=Petrucci | first2=R. | last3=Saffe | first3=C. | last4=Saker | first4=L. | last5=Artur de la Villarmois | first5=E. | last6=Chavero | first6=C. | last7=Gómez | first7=M. | last8=Mauas | first8=P. J. D. | s2cid=53666931 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/A%2bA/574/A50/stars&Name=HD%20124882 Vizier catalog entry]

| prop_mo_ra = -96.12

| prop_mo_dec = -13.27

| parallax = 10.91

| p_error = 0.14

| parallax_footnote =

| absmag_v=−0.35 ± 0.09

}}

{{Starbox detail

| mass = 1.06

| radius = 24.61

| temperature = 4,311

| luminosity = 271

| rotational_velocity = 1.1{{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=124882 Vizier catalog entry]

| gravity = 1.89

| metal_fe = -0.42

}}

{{Starbox catalog

| names = CD-83 189, GC 19349, HIP 70638, HR 5339, HD 124882, NSV 6636, SAO 258698

}}

{{Starbox reference

| Simbad = Delta+Octantis

}}

{{Starbox end}}

δ Octantis, Latinised as Delta Octantis, has the distinction of being Saturn's southern pole star.{{cite web|title=Octans|url=http://www.topastronomer.com/StarCharts/Constellations/Octans.php|publisher=UK Astronomy Society|access-date=10 October 2011|archive-date=1 August 2020|archive-url=https://web.archive.org/web/20200801014846/http://www.topastronomer.com/StarCharts/Constellations/Octans.php|url-status=dead}} An orange giant of class K2III, it has 1.2 times the mass of the Sun and about 25 times the Sun's radius. This star is about 4.3 billion years old, which is similar to the age of the Sun.