[{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/wiki.edu.vn\/en\/wiki13\/hd-3-wikipedia\/#BlogPosting","mainEntityOfPage":"https:\/\/wiki.edu.vn\/en\/wiki13\/hd-3-wikipedia\/","headline":"HD 3 – Wikipedia","name":"HD 3 – Wikipedia","description":"From Wikipedia, the free encyclopedia Star in the constellation Andromeda HD 3 is a single,[8] white-hued star in the northern","datePublished":"2019-07-29","dateModified":"2019-07-29","author":{"@type":"Person","@id":"https:\/\/wiki.edu.vn\/en\/wiki13\/author\/lordneo\/#Person","name":"lordneo","url":"https:\/\/wiki.edu.vn\/en\/wiki13\/author\/lordneo\/","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/44a4cee54c4c053e967fe3e7d054edd4?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/44a4cee54c4c053e967fe3e7d054edd4?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Enzyklop\u00e4die","logo":{"@type":"ImageObject","@id":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","url":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/en.wikipedia.org\/wiki\/Special:CentralAutoLogin\/start?type=1x1","url":"https:\/\/en.wikipedia.org\/wiki\/Special:CentralAutoLogin\/start?type=1x1","height":"1","width":"1"},"url":"https:\/\/wiki.edu.vn\/en\/wiki13\/hd-3-wikipedia\/","wordCount":2986,"articleBody":"From Wikipedia, the free encyclopediaStar in the constellation AndromedaHD 3 is a single,[8] white-hued star in the northern constellation Andromeda. With an apparent visual magnitude of 6.71,[2] it is below the nominal brightness limit for visibility with the typical naked eye but may still be visible by some observers under ideal viewing conditions. It is also the first star indexed in the Bright Star Catalogue.[7] Based upon an annual parallax shift of 6.3137\u00b10.0826\u00a0mas,[1] it is located roughly 517\u00a0light years away. The star is moving closer with a heliocentric radial velocity of \u221218\u00a0km\/s,[4] and will make perihelion in around 2.9\u00a0million years at a separation of around 351\u00a0ly (107.71\u00a0pc).[5]The stellar classification of this star is A1\u00a0Vn,[3] indicating it is an  A-type main-sequence star with “nebulous” lines due to rapid rotation. It is a Lambda Bo\u00f6tis candidate star, being classified as chemically-peculiar by Abt & Morrell (1995).[9] Murphy et al. (2015) list the membership likelihood as uncertain.[2] HD 3 has 2.36[3] times the mass of the Sun and about 1.9[6] times the Sun’s radius. It is spinning with a projected rotational velocity of 228\u00a0km\/s.[3] The star is radiating around 43.5[3] times the Sun’s luminosity from its photosphere at an effective temperature of about 9,057\u00a0K.[3]HD 3 has two visual companions. Component B is a magnitude 13.70 star at an angular separation of 16\u2033 along a position angle (PA) of 107\u00b0, as of 2016. The third star, component C, is magnitude 10.58\tand lies at a separation of 21\u2033 along a PA of 235\u00b0, also as of 2016.[10]References[edit]^ a b c d e f Brown, A. G. A.;  et\u00a0al. (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\u00a0227254300. (Erratum:\u00a0doi:10.1051\/0004-6361\/202039657e).  Gaia EDR3 record for this source at VizieR.^ a b c d Murphy, Simon J.;  et\u00a0al. (October 2015), “An Evaluation of the Membership Probability of 212 \u03bb Boo Stars. I. A Catalogue”, Publications of the Astronomical Society of Australia, 32: 43, arXiv:1508.03633, Bibcode:2015PASA…32…36M, doi:10.1017\/pasa.2015.34, S2CID\u00a059405545, e036.^ a b c d e f g h i j k Zorec, J.; Royer, F. (January 2012), “Rotational velocities of A-type stars. IV. Evolution of rotational velocities”, Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A…537A.120Z, doi:10.1051\/0004-6361\/201117691, S2CID\u00a055586789.^ a b de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), “Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project”, Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A…546A..61D, doi:10.1051\/0004-6361\/201219219, S2CID\u00a059451347, A61.^ 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\u00a0119257644.^ a b Pasinetti Fracassini, L. E.;  et\u00a0al. (February 2001), “Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)”, Astronomy and Astrophysics (Third\u00a0ed.), 367 (2): 521\u2013524, arXiv:astro-ph\/0012289, Bibcode:2001A&A…367..521P, doi:10.1051\/0004-6361:20000451, S2CID\u00a0425754.^ a b “HD 3”. SIMBAD. Centre de donn\u00e9es astronomiques de Strasbourg. Retrieved 2018-04-30.^ Abt, H. A. (March 1981), “Visual multiples. VII – MK classifications”, Astrophysical Journal Supplement Series, 45: 437\u2013456, Bibcode:1981ApJS…45..437A, doi:10.1086\/190719.^ Gerbaldi, M.;  et\u00a0al. (December 2003), “The heterogeneous class of lambda Bootis stars”, Astronomy and Astrophysics, 412 (2): 447\u2013464, Bibcode:2003A&A…412..447G, doi:10.1051\/0004-6361:20031472.^ Mason, B. D.;  et\u00a0al. (2014), “The Washington Visual Double Star Catalog”, The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ….122.3466M, doi:10.1086\/323920.External links[edit]"},{"@context":"http:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki13\/#breadcrumbitem","name":"Enzyklop\u00e4die"}},{"@type":"ListItem","position":2,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki13\/hd-3-wikipedia\/#breadcrumbitem","name":"HD 3 – Wikipedia"}}]}]