Star in the constellation of Octans
Eta Octantis , Latinized from η Octantis , is a solitary star located in the southern circumpolar constellation Octans . It has an apparent magnitude of 6.19,[ 2] naked eye . The object is situated at a distance of 358 light years [ 1] Solar System with a heliocentric radial velocity of km/s [ 6]
Eta Octantis has a stellar classification of A1 Va,[ 4] A-type main sequence star . At present it has 2.37 times the Sun's mass [ 3] Sun's radius .[ 8] luminosity of L ☉ [ 3] photosphere at an effective temperature of 9,500 K , giving a white hue.[ 9] projected rotational velocity of km/s [ 11] million years old,[ 10] main sequence lifetime.[ 3]
^ a b c d e Brown, A. G. A. ; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties" . Astronomy & Astrophysics 649 : A1. arXiv :2012.01533 Bibcode :2021A&A...649A...1G . doi :10.1051/0004-6361/202039657 S2CID 227254300 . (Erratum: doi :10.1051/0004-6361/202039657e ) . Gaia EDR3 record for this source at VizieR .^ 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. (1 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 Paunzen, E.; Duffee, B.; Heiter, U.; Kuschnig, R.; Weiss, W. W. (July 2001). "A spectroscopic survey for λ Bootis stars" . Astronomy & Astrophysics . 373 (2): 625– 632. Bibcode :2001A&A...373..625P . doi :10.1051/0004-6361:20010630 eISSN 1432-0746 . ISSN 0004-6361 . ^ 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 . 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 . ISSN 1063-7737 . S2CID 119257644 . ^ a b Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS 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 ISSN 0004-6256 . ^ a b c Lafrasse, Sylvain; Mella, Guillaume; Bonneau, Daniel; Duvert, Gilles; Delfosse, Xavier; Chesneau, Olivier; Chelli, Alain (16 July 2010). "Building the 'JMMC Stellar Diameters Catalog' using SearchCal". Optical and Infrared Interferometry II . Vol. 7734. pp. 77344E. arXiv :1009.0137 Bibcode :2010SPIE.7734E..4EL . doi :10.1117/12.857024 . S2CID 32097037 . ^ a b c 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 255201789 . ^ a b Reiners, A.; Royer, F. (February 2004). "First signatures of strong differential rotation in A-type stars" . Astronomy & Astrophysics . 415 (1): 325– 329. arXiv :astro-ph/0311341 Bibcode :2004A&A...415..325R . doi :10.1051/0004-6361:20034175 eISSN 1432-0746 . ISSN 0004-6361 . ^ 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 . ^ "eta Oct" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved June 25, 2022 .
