Star in the constellation Puppis
20 Puppis is a solitary[ 10] star in the southern constellation of Puppis . It is visible to the naked eye as a faint, yellow-hued star with an apparent visual magnitude of 4.99.[ 2] The star lies approximately 990 light years away from the Sun based on parallax . It is receding from the Earth with a heliocentric radial velocity of +16.8 km/s.[ 4]
This object has a stellar classification of G4 Ib-II,[ 3] matching a G-type star with a luminosity class part way between a bright giant and a supergiant star . It is just 90[ 6] million years old with around five[ 6] times the mass of the Sun . The star has expanded to 48[ 1] times the Sun's radius and is radiating 1,087[ 1] times as much luminosity as the Sun from its enlarged photosphere at an effective temperature of 4,804 K.[ 1]
References
^ a b c d e f g h i j k Brown, A. G. A. ; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties" . Astronomy & Astrophysics . 616 . A1. arXiv :1804.09365 . Bibcode :2018A&A...616A...1G . doi :10.1051/0004-6361/201833051 . Gaia DR2 record for this source at VizieR .
^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues . 2237 . Bibcode :2002yCat.2237....0D .
^ a b Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series . 71 : 245. Bibcode :1989ApJS...71..245K . doi :10.1086/191373 .
^ a b Gontcharov, G. A. (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 . S2CID 119231169 .
^ a b Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331. arXiv :1108.4971 . Bibcode :2012AstL...38..331A . doi :10.1134/S1063773712050015 . S2CID 119257644 . Vizier catalog entry
^ a b c d Lyubimkov, Leonid S.; et al. (2010). "Accurate fundamental parameters for A-, F- and G-type Supergiants in the solar neighbourhood" . Monthly Notices of the Royal Astronomical Society . 402 (2): 1369. arXiv :0911.1335 . Bibcode :2010MNRAS.402.1369L . doi :10.1111/j.1365-2966.2009.15979.x . S2CID 119096173 .
^ Soubiran, Caroline; et al. (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics . 591 : A118. arXiv :1605.07384 . Bibcode :2016A&A...591A.118S . doi :10.1051/0004-6361/201628497 . S2CID 119258214 .
^ De Medeiros, J. R.; Mayor, M. (1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series . 139 (3): 433. arXiv :astro-ph/0608248 . Bibcode :1999A&AS..139..433D . doi :10.1051/aas:1999401 . Vizier catalog entry
^ "20 Pup" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2019-06-04 .
^ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems" . Monthly Notices of the Royal Astronomical Society . 389 (2): 869. arXiv :0806.2878 . Bibcode :2008MNRAS.389..869E . doi :10.1111/j.1365-2966.2008.13596.x . S2CID 14878976 .