Star in the constellation of Octans
Omega Octantis , (latinized fromω Octantis ), is a solitary,[ 14] star located in the southerncircumpolar constellation Octans . It has anapparent magnitude of 5.87,[ 2] naked eye . Based on the object'sparallax measurements, it is estimated to be 328light years distant.[ 1] radial velocity km/s [ 6]
Omega Octantis has astellar classification of B9.5 V,[ 4] main-sequence star between the B9 and A0 classes.Helmut A. Abt &Nidia I. Morrell gave a slightly updated class of B9.5 Vs,[ 15] absorption lines in Omega Octantis'spectrum due to slow rotation. It has amass 2.54 times that of theSun [ 3] million years old,[ 9] main sequence lifetime.[ 3] luminosity of 50.5 L ☉ [ 3] radius of 2.35 R ☉ effective temperature ofK metallicity for Omega Octantis,[ 10] projected rotational velocity ofkm/s [ 11] [ 15]
^a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023)."Gaia Data Release 3. Summary of the content and survey properties" .Astronomy and Astrophysics .674 : A1.arXiv :2208.00211 Bibcode :2023A&A...674A...1G .doi :10.1051/0004-6361/202243940 S2CID 244398875 . Gaia DR3 record for this source atVizieR .^a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars".Astronomy and Astrophysics .355 :L27 – L30 .Bibcode :2000A&A...355L..27H .ISSN 0004-6361 . ^a b c d e f Zorec, J.; Royer, F. (January 2012)."Rotational velocities of A-type stars. IV. Evolution of rotational velocities" .Astronomy and Astrophysics .537 : A120.arXiv :1201.2052 Bibcode :2012A&A...537A.120Z .doi :10.1051/0004-6361/201117691 ISSN 0004-6361 .S2CID 55586789 . ^a b Houk, N.; Cowley, A. P. (1975).University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations −90° to −53° .Bibcode :1975mcts.book.....H . ^a b Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars".Communications of the Lunar and Planetary Laboratory .4 :99– 110.Bibcode :1966CoLPL...4...99J . ^a b Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system".Astronomy Letters .32 (11):759– 771.arXiv :1606.08053 Bibcode :2006AstL...32..759G .doi :10.1134/S1063773706110065 .eISSN 1562-6873 .ISSN 1063-7737 .S2CID 119231169 . ^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation".Astronomy Letters .38 (5):331– 346.arXiv :1108.4971 Bibcode :2012AstL...38..331A .doi :10.1134/S1063773712050015 .eISSN 1562-6873 .ISSN 1063-7737 .S2CID 119257644 . ^ Stassun, Keivan G.; et al. (9 September 2019)."The RevisedTESS Input Catalog and Candidate Target List" .The Astronomical Journal .158 (4): 138.arXiv :1905.10694 Bibcode :2019AJ....158..138S .doi :10.3847/1538-3881/ab3467 eISSN 1538-3881 . ^a b c d David, Trevor J.; Hillenbrand, Lynne A. (12 May 2015)."The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets" .The Astrophysical Journal .804 (2): 146.arXiv :1501.03154 Bibcode :2015ApJ...804..146D .doi :10.1088/0004-637X/804/2/146 eISSN 1538-4357 . ^a b Gontcharov, G. A. (December 2012). "Dependence of kinematics on the age of stars in the solar neighborhood".Astronomy Letters .38 (12):771– 782.arXiv :1606.08814 Bibcode :2012AstL...38..771G .doi :10.1134/S1063773712120031 .ISSN 0320-0108 .S2CID 118345778 . ^a b Levato, H.; Grosso, M. (June 2004). "New Projected Rotational Velocities of All Southern B-type Stars of the Bright Star Catalogue".Astronomical Society of the Pacific .215 : 51.Bibcode :2004IAUS..215...51L . ^ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas".Resultados del Observatorio Nacional Argentino .1 .Bibcode :1879RNAO....1.....G . ^ "Omega Oct" .SIMBAD Centre de données astronomiques de Strasbourg . RetrievedAugust 21, 2022 .^ Eggleton, P. P.; Tokovinin, A. A. (11 September 2008)."A catalogue of multiplicity among bright stellar systems" .Monthly Notices of the Royal Astronomical Society .389 (2):869– 879.arXiv :0806.2878 Bibcode :2008MNRAS.389..869E .doi :10.1111/j.1365-2966.2008.13596.x eISSN 1365-2966 .ISSN 0035-8711 . ^a b Abt, Helmut A.; Morrell, Nidia I. (July 1995)."The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars" .The Astrophysical Journal Supplement Series .99 : 135.Bibcode :1995ApJS...99..135A .doi :10.1086/192182 ISSN 0067-0049 .
