Kappa Doradus

κ Doradus
Location of κ Doradus on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Dorado
Right ascension 04h 44m 21.17834s[1]
Declination −59° 43′ 57.8563″[1]
Apparent magnitude (V) 5.28[2] (5.27 - 5.30)[3]
Characteristics
Spectral type A8 IV[4]
B−V color index +0.20[5]
Variable type suspected δ Scuti[3]
Astrometry
Radial velocity (Rv)0.00±3.70[6] km/s
Proper motion (μ) RA: +23.860 mas/yr[1]
Dec.: +39.974 mas/yr[1]
Parallax (π)14.8207 ± 0.0795 mas[1]
Distance220 ± 1 ly
(67.5 ± 0.4 pc)
Absolute magnitude (MV)+1.15[7]
Details
Mass1.78+0.36
−0.20[8] M☉
Radius2.88+0.21
−0.19[9] R☉
Luminosity26.6[10] L☉
Surface gravity (log g)3.79±0.08[9] cgs
Temperature7,623±123[11] K
Metallicity [Fe/H]−0.18[12] dex
Rotational velocity (v sin i)230[13] km/s
Other designations
κ Dor, 12 G. Doradus[14], NSV 16162, CPD−59°376, FK5 2354, GC 5810, HD 30478, HIP 22040, HR 1530, SAO 233664, TIC 220414802[15]
Database references
SIMBADdata

Kappa Doradus, Latinized from κ Doradus, is a solitary star[16] located in the southern constellation Dorado. It is faintly visible to the naked eye as a white-hued point of light with an apparent magnitude of 5.28.[2] The object is located relatively close at a distance of 220 light-years based on Gaia DR3 parallax measurements[1] and its distance from the Solar System is not changing, having a somewhat constrained heliocentric radial velocity of 0.00 km/s.[6] At its current distance, Kappa Doradus' brightness is diminished by two-tenths of a magnitude due to interstellar extinction[17] and it has an absolute magnitude of +1.15.[7]

The object has been given many different classes. Houk & Cowley (1975) gave a class of A8/9 III/IV,[18] indicating that it is an evolved A-type star with the characteristics of an A8 and A9 star and the blended luminosity class of a giant star and a subgiant. It has also been given a class of A8 IV and A5 III,[4][19] indicating either a slightly evolved subgiant or an evolved giant star. Kappa Doradus has 1.78 times the mass of the Sun[8] and 2.88 times the radius of the Sun.[9] However, this is only its polar radius, as it has an equatorial bulge 26% greater than its polar radius.[20] It radiates 26.6 times the luminosity of the Sun[10] from its photosphere at an effective temperature of 7,623 K.[11] Kappa Doradus is metal deficient with an iron abundance 66.1% of the Sun's or [Fe/H] = −0.18.[12] Like many hot stars it spins rapidly, having a projected rotational velocity of 230 km/s,[13] which causes the aforementioned oblation.[20]

Kappa Doradus variability was first observed in 1981 by astronomer H. M. Matizen.[21] In the paper, it is used as a comparison star for Alpha Doradus. Matizen found out that Kappa Doradus show Delta Scuti-like amplitudes of 0.03 magnitudes in the visual passband within hours.[3] As of 2004 however, it has not been confirmed to be variable.[22]

References

  1. ^ 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 at VizieR.
  2. ^ 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. S2CID 17128864.
  3. ^ a b c Samus’, N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (January 2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. eISSN 1562-6881. ISSN 1063-7729. S2CID 125853869.
  4. ^ a b Gray, R. O.; Garrison, R. F. (July 1989). "The late A-type stars - Refined MK classification, confrontation with Stromgren photometry, and the effects of rotation". The Astrophysical Journal Supplement Series. 70: 623. Bibcode:1989ApJS...70..623G. doi:10.1086/191349. eISSN 1538-4365. ISSN 0067-0049. S2CID 121737313.
  5. ^ Lake, R. (1965). "Photometric Magnitudes and Colours for Bright Southern Stars (Sixth List)". Monthly Notes of the Astronomical Society of South Africa. 24: 41. Bibcode:1965MNSSA..24...41L. ISSN 0024-8266.
  6. ^ a b Kharchenko, N.V.; Scholz, R.-D.; Piskunov, A.E.; Röser, S.; Schilbach, E. (November 2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889–896. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. eISSN 1521-3994. ISSN 0004-6337. S2CID 119323941.
  7. ^ a b 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.
  8. ^ 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. eISSN 1538-3881. hdl:1721.1/124721. S2CID 166227927.
  9. ^ a b c Allende Prieto, C.; Lambert, D. L. (December 1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555–562. arXiv:astro-ph/9911002. Bibcode:1999A&A...352..555A. ISSN 0004-6361. S2CID 13365201.
  10. ^ a b McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. eISSN 1365-2966. ISSN 0035-8711. S2CID 118665352.
  11. ^ a b Paunzen, E.; Schnell, A.; Maitzen, H. M. (October 2006). "An empirical temperature calibration for the Δa photometric system II: The A-type and mid F-type stars". Astronomy & Astrophysics. 458 (1): 293–296. arXiv:astro-ph/0607567. Bibcode:2006A&A...458..293P. doi:10.1051/0004-6361:20064889. eISSN 1432-0746. ISSN 0004-6361. S2CID 18219735.
  12. ^ a b Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. eISSN 1432-0746. ISSN 0004-6361. S2CID 131780028.
  13. ^ a b Huang, Su-Shu (September 1953). "A Statistical Study of the Rotation of the Stars". The Astrophysical Journal. 118: 285. Bibcode:1953ApJ...118..285H. doi:10.1086/145751. eISSN 1538-4357. ISSN 0004-637X. S2CID 120328179.
  14. ^ 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.
  15. ^ "* kap Dor". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved September 3, 2023.
  16. ^ 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. S2CID 14878976.
  17. ^ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv:1709.01160. Bibcode:2017MNRAS.472.3805G. doi:10.1093/mnras/stx2219. eISSN 1365-2966. ISSN 0035-8711. S2CID 118879856.
  18. ^ Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars: Declinations −90° to −53°. Vol. 1. Bibcode:1975mcts.book.....H.
  19. ^ 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. S2CID 120495962.
  20. ^ a b van Belle, Gerard T. (14 March 2012). "Interferometric observations of rapidly rotating stars". The Astronomy and Astrophysics Review. 20 (1): 51. arXiv:1204.2572. Bibcode:2012A&ARv..20...51V. doi:10.1007/s00159-012-0051-2. eISSN 1432-0754. ISSN 0935-4956. S2CID 253689867.
  21. ^ Maitzen, H. M. (April 1981). "Variability of the Extreme Silicon Star alpha Dor = HD 29305". Information Bulletin on Variable Stars. 1950: 1. Bibcode:1981IBVS.1950....1M. ISSN 0374-0676.
  22. ^ Samus, N. N.; Durlevich, O. V. (November 2004). "VizieR Online Data Catalog: Combined General Catalogue of Variable Stars (Samus+ 2004)". VizieR Online Data Catalog: II/250. Bibcode:2004yCat.2250....0S.

Read other articles:

Kepulauan Banyak

Pulau BanyakGeografiLokasiAsia TenggaraKoordinat2°10′N 97°15′E / 2.167°N 97.250°E / 2.167; 97.250Jumlah pulau63 buahPulau besarTuangku, BangkaruLuas135 km2Titik tertinggiGunung TiusaPemerintahanNegaraIndonesiaProvinsiAcehKabupatenAceh SingkilKecamatanPulau Banyak dan Pulau Banyak BaratKota terbesarPulau Balai (1.432 jiwa)KependudukanPenduduk5.926 jiwa jiwa (2006)Kepadatan46,4 jiwa/km² jiwa/km2Kelompok etnikHaloban, Aneuk Jamee ...

 

Dolores Redondo

Questa voce sull'argomento scrittori spagnoli è solo un abbozzo. Contribuisci a migliorarla secondo le convenzioni di Wikipedia. Segui i suggerimenti del progetto di riferimento. Dolores Redondo a Saragozza nel 2014 Dolores Redondo Meira (San Sebastián, 1º febbraio 1969) è una scrittrice spagnola. Indice 1 Biografia 2 Opere 2.1 Trilogia Baztán 2.2 Altri romanzi 3 Filmografia 4 Premi e riconoscimenti 5 Note 6 Altri progetti 7 Collegamenti esterni Biografia Nata a San Sebastián nel ...

 

Desana

Desana commune di Italia Tempat Negara berdaulatItaliaRegion di ItaliaPiedmontProvinsi di ItaliaProvinsi Vercelli NegaraItalia Ibu kotaDesana PendudukTotal1.085  (2023 )GeografiLuas wilayah16,48 km² [convert: unit tak dikenal]Ketinggian131 m Berbatasan denganAsigliano Vercellese Costanzana Lignana Ronsecco Vercelli Tricerro Informasi tambahanKode pos13034 Zona waktuUTC+1 UTC+2 Kode telepon0161 ID ISTAT002054 Kode kadaster ItaliaD281 Lain-lainSitus webLaman resmi Desana adalah komun...

Mallee bioregion

Biogeographic region in southern Western Australia For the region in Victoria, see The Mallee. For the region in South Australia, see Murray Mallee. MalleeWestern AustraliaThe interim Australian bioregions,with Mallee in redArea73,975.59 km2 (28,562.1 sq mi) Localities around Mallee: Avon Wheatbelt Coolgardie Coolgardie Avon Wheatbelt Mallee Hampton Avon Wheatbelt Esperance Plains Esperance Plains The IBRA regions, with Mallee in red Mallee, also known as Roe Botanical District...

 

Йездегерд I

В Википедии есть статьи о других людях с именем Йездигерд. Йездигерд Iпехл. Yazdekert; сирийск. Yazdegerd, Izdegerd или Yazdeger; арм. Հազկերտ (Hazkert); др.-греч. Ἰσδιγέρδης; араб. یزدگرد (Yazdigird, Yazdigard‎) Изображение Йездигерда I на серебряной драхме шахиншах Ирана и не-Ирана 399/400 — 420/421 Пред...

 

Associazione Sportiva Reggina 1963-1964

Questa voce sull'argomento stagioni delle società calcistiche italiane è solo un abbozzo. Contribuisci a migliorarla secondo le convenzioni di Wikipedia. Segui i suggerimenti del progetto di riferimento. Associazione Sportiva RegginaStagione 1963-1964Sport calcio Squadra Reggina Allenatore Leo Zavatti Presidente Oreste Granillo Serie C4º posto 1962-1963 1964-1965 Si invita a seguire il modello di voce Questa pagina raccoglie i dati riguardanti l'Associazione Sportiva Reggina nel...

1648 en science

Chronologies Données clés 1645 1646 1647  1648  1649 1650 1651Décennies :1610 1620 1630  1640  1650 1660 1670Siècles :XVe XVIe  XVIIe  XVIIIe XIXeMillénaires :-Ier Ier  IIe  IIIe Chronologies thématiques Art Architecture, Arts plastiques (Dessin, Gravure, Peinture et Sculpture), (), Littérature (), Musique (Classique) et Théâtre   Ingénierie (), Architecture et ()   Politique Droit et ()   Religion (,)   Sci...

 

Allemagne au Concours Eurovision de la chanson 2001

Cet article est une ébauche concernant le Concours Eurovision de la chanson et l’Allemagne. Vous pouvez partager vos connaissances en l’améliorant (comment ?) ; pour plus d’indications, visitez le projet Eurovision. Si ce bandeau n'est plus pertinent, retirez-le. Cliquez ici pour en savoir plus. Cet article ne cite pas suffisamment ses sources (décembre 2023). Si vous disposez d'ouvrages ou d'articles de référence ou si vous connaissez des sites web de qualité traitant ...

 

Promozione 1955-1956

Promozione 1955-1956 Competizione Promozione Sport Calcio Edizione 4ª Organizzatore FIGCLeghe Regionali Luogo  Italia Cronologia della competizione 1954-1955 1956-1957 Manuale Nella stagione 1955-1956, la Promozione era il quinto livello del calcio italiano (il primo livello regionale). Suddiviso in tanti gironi regionali, è l'antesignano dell'attuale Eccellenza. Per ottenere la promozione in IV Serie non era sufficiente vincere il campionato. La Federazione, nel valutare i titoli spo...

Mastertronic

British computer game publisher This article is about the original Mastertronic. For the business of the same name in existence from 2004 to 2015, see Mastertronic Group. MastertronicScreenshot of the official logoIndustryComputer game softwareFounded1983FoundersMartin AlperFrank HermanTerry MedwayAlan SharamFateMerged with Virgin Group in 1988, and acquired by Sega in 1991 Mastertronic was originally a publisher and distributor of low-cost computer game software founded in 1983.[1] T...

 

Casali del Manco

Casali del Mancocomune LocalizzazioneStato Italia Regione Calabria Provincia Cosenza AmministrazioneSindacoFrancesca Pisani (lista civica #unpassoavanti Casali del Manco 2.0) dal 15-5-2023 Data di istituzione5 maggio 2017 TerritorioCoordinate39°17′29.6″N 16°24′31″E / 39.291556°N 16.408611°E39.291556; 16.408611 (Casali del Manco)Coordinate: 39°17′29.6″N 16°24′31″E / 39.291556°N 16.408611°E39.291556; 16.408611�...

 

Sperm whale

Largest species of toothed whale Cachalot redirects here. For other uses, see Cachalot (disambiguation). Kashalot redirects here. For the Soviet submarine, see Kashalot-class submarine. For the 2015 film, see Sperm Whale (film). Sperm whale[1]Temporal range: Pliocene – Recent[2] PreꞒ Ꞓ O S D C P T J K Pg N ↓ Conservation status Vulnerable  (IUCN 3.1)[3] CITES Appendix I (CITES)[4] Scientific classification Domain: Eukaryota Kingdom: Animal...

Філософія

Частина серії проФілософіяLeft to right: Plato, Kant, Nietzsche, Buddha, Confucius, AverroesПлатонКантНіцшеБуддаКонфуційАверроес Філософи Епістемологи Естетики Етики Логіки Метафізики Соціально-політичні філософи Традиції Аналітична Арістотелівська Африканська Близькосхідна іранська Буддій�...

 

Гран-при Франции 1973 года

Гран-при Франции 1973 годафр. 59e Grand Prix de France Дата 1 июля 1973 года Место Франция Трасса Поль Рикар (5810 м) Дистанция 54 круга, 313,740 км Погода Жарко, сухо Поул 1:48,37 (193,01 км/ч) Джеки СтюартTyrrell-Ford Быстрый круг 1:50,99 (188,45 км/ч)52-й круг Денни ХалмMcLaren-Ford Подиум Победитель Ронни Петерс...

 

Zulu people

A Nguni ethnic group in Southern Africa Amazulu redirects here. For other uses, see Amazulu (disambiguation). Ethnic group Zulu peopleAmaZuluTotal population14,243,600[1]Regions with significant populations South Africa13,644,000[1][2] Zimbabwe207,000[1] Lesotho204,000[1] Eswatini99,000[1] Malawi76,000[1] Mozambique6,900[1] Botswana6,700[1]LanguagesZuluTsonga, Sotho, Xhosa, EnglishReligi...

Long Island Central Pine Barrens

Natural area in Suffolk County, New York, United States Long Island Central Pine BarrensLocation of the Long Island Central Pine BarrensLocationNew York, United StatesNearest cityManorvilleCoordinates40°50′53″N 72°47′38″W / 40.84806°N 72.79389°W / 40.84806; -72.79389Area100,000 acres (400 km2)Established1993Governing bodyCentral Pine Barrens Joint Planning and Policy Commission Long Island Pine Barrens Trail office in Manorville, New York The...

 

Volleyball at the 1976 Summer Olympics – Men's tournament

Men's volleyballat the Games of the XXI OlympiadVenueMontreal Forum andPaul Sauvé ArenaDate18–30 JulyMedalists  Poland (1st title)  Soviet Union  Cuba← 19721980 → The men's tournament in volleyball at the 1976 Summer Olympics was the 4th edition of the event at the Summer Olympics, organized by the world's governing body, the FIVB in conjunction with the IOC. It was held in Montreal, Canada from 18 to 30 July 1976.[1] Qualification Means of qual...

 

Kenosha Mountains

Mountain in Colorado, United States Kenosha MountainsKenosha Mountains viewed from Platte Peak looking southeast.Highest pointPeakKnobby Crest(Peak X)[1]Elevation12,429 ft (3,788 m)ListingMountain ranges of ColoradoCoordinates39°22′5″N 105°36′18″W / 39.36806°N 105.60500°W / 39.36806; -105.60500GeographyKenosha Mountains CountryUnited StatesStateColoradoParent rangeFront Range The Kenosha Mountains or Kenosha Mountain[2] are a ...

JazzTimes

American jazz magazine This article relies excessively on references to primary sources. Please improve this article by adding secondary or tertiary sources. Find sources: JazzTimes – news · newspapers · books · scholar · JSTOR (September 2014) (Learn how and when to remove this message) Jazz TimesFormer editorsIra Davidson Sabin & Lee C. MergnerCategoriesMusic magazineFrequency10 per yearFounderIra Davidson SabinFounded1970CompanyTitles JCMC, LLCC...

 

10 février

Pour les articles homonymes, voir Dix-Février. Éphémérides Février 1er 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29             10 janvier 10 mars Chronologies thématiques Croisades Ferroviaires Sports Disney Anarchisme Catholicisme Abréviations / Voir aussi (° 1852) = né en 1852 († 1885) = mort en 1885 a.s. = calendrier julien n.s. = calendrier grégorien Calendrier Calendrier perpétuel Liste de calendriers Naissances ...