HD 140283

HD 140283
La stella ripresa nell'ambito del Digitized Sky Survey dall'UK Schmidt Telescope dell'Osservatorio anglo-australiano.
ClassificazioneSubgigante bianco-gialla
Classe spettraleF3IV
Distanza dal Sole188,54 ± 1,52 anni luce (58.30 ± 0.48 pc)
CostellazioneBilancia
Coordinate
(all'epoca J2000.0)
Ascensione retta15h 43m 2,1s
Declinazione-10° 56′ 4,7″
Dati fisici
Raggio medio2,04[1] R
Massa
0,81[2] M
Periodo di rotazione14,4 ore
Velocità di rotazione
(media)
≤ 3,9 m/s
Temperatura
superficiale
  • 5787 ± 48 K[1] (media)
Luminosità
4,82[1] L
Metallicità[Fe/H] = −2.40 ± 0.10
(0,04% rispetto al Sole)
Età stimata12 ± 0,5 miliardi di anni[2]
Dati osservativi
Magnitudine app.7,21[1]
Magnitudine ass.3,41
Parallasse0,01744 arcsec
Moto proprioAR: -1114,93 mas/anno
Dec: -304,36 mas/anno
Velocità radiale-169 km/s
Nomenclature alternative
SAO 159459; HIP 76976; Gliese 1195; BD-10 4149; Lalande 28607

HD 140283, soprannominata stella Matusalemme, è una stella povera di metalli, situata a circa 190 anni luce dalla Terra, appartenente alla costellazione della Bilancia. Con un livello di ferro inferiore di un fattore di 250 volte rispetto al Sole è tra le stelle della popolazione II più vicine alla Terra ed è studiata dagli astronomi per la sua grande velocità radiale e l'età molto elevata, che la pone tra le stelle più antiche conosciute.[3]

Stato attuale

Poiché HD 140283 non si trova né nella Sequenza principale né nel ramo delle giganti, la sua posizione nel Diagramma HR può essere ipotizzata solo tramite i modelli teorici dell'evoluzione stellare. Comunque contiene una discreta quantità di litio e, perciò, non dovrebbe ancora aver subito il primo dredge-up.

La questione dell'età

Posizione della stella nella Bilancia.

Per le stelle di sfondo (che cioè normalmente sono visibili durante l'osservazione di altri oggetti celesti) è raro conoscere la luminosità, la temperatura superficiale e la composizione abbastanza bene da fare una precisa valutazione dell'età della stella; a causa della loro relativa scarsità, è ancora più raro per una stella come HD 140283. Uno studio dell'astronomo Howard Bond ha stimato l'età della stella in circa 14,46 ± 0,8 miliardi di anni tramite gli interferometri del Telescopio Hubble. Questa stima non è in conflitto con l'età dell'Universo determinata dal satellite Planck in 13,798 ± 0,037 miliardi di anni, poiché 14,46-0,8 è uguale a 13,66 miliardi di anni, rendendo comunque possibile concludere che HD 140283 sia una delle stelle più antiche tra quelle attualmente osservabili.

L'importanza scientifica

Accurate determinazioni dell'età di stelle molto povere di metalli come HD 140283 e quelle appartenenti agli ammassi globulari possono porre un limite alle teorie cosmologiche sull'origine dell'Universo ma possono anche fornire preziose informazioni sulla storia più recente del cosmo. La scarsità di metalli di HD 140283 indica che appartiene alla Popolazione II e gli elementi pesanti che contiene potrebbero provenire da stelle di Popolazione III che sembrerebbero essere state scoperte di recente e di cui stelle come HD 140283 possono costituire una prova. Infine, possono anche permettere di capire i processi di nucleosintesi e la composizione delle stelle di Popolazione III.

Note

Voci correlate

Altri progetti

Collegamenti esterni

  Portale Stelle: accedi alle voci di Wikipedia che trattano di stelle e costellazioni

Read other articles:

No debe confundirse con Baetica. Bética País EspañaSede SevillaFundación noviembre de 1913Fin de publicación 1917Idioma castellanoISSN 2171-5114[editar datos en Wikidata] Bética fue una revista cultural publicada en la ciudad española de Sevilla entre noviembre de 1913 y principios de 1917. Descripción Fundada en noviembre de 1913,[1]​ fue el órgano de expresión del Ateneo de Sevilla y en ella contribuyeron algunos de los intelectuales andaluces más prestigiosos de ...

 

هذه المقالة يتيمة إذ تصل إليها مقالات أخرى قليلة جدًا. فضلًا، ساعد بإضافة وصلة إليها في مقالات متعلقة بها. (مارس 2016) فوسافنجين اعتبارات علاجية مرادفات Fusafungin ASHPDrugs.com أسماء الدواء الدولية معرّفات CAS 1393-87-9 Y ك ع ت R02R02AB03 AB03 بوب كيم 3084092  ECHA InfoCard ID 100.014.306  درغ بنك DB08965 المكون ...

 

Mercedes-Benz L 337 als Feuerwehr-DrehleiterfahrzeugL 337 als Feuerwehr-Drehleiterfahrzeug L 337 Hersteller: Daimler-Benz AG Verkaufsbezeichnung: L 337LP 337LK 337 Produktionszeitraum: 1959–1961 Vorgängermodell: keines Nachfolgemodell: L 338 Technische Daten Bauformen: Frontlenker, Kurzhauber Motoren: OM 326(Diesel, 10.809 cm³) Leistung: 127 kW Nutzlast: 7,23 t zul. Gesamtgewicht: 12 t Der Mercedes-Benz L 337 ist ein Lastkraftwagen der Marke Mercedes-Ben...

هذه المقالة يتيمة إذ تصل إليها مقالات أخرى قليلة جدًا. فضلًا، ساعد بإضافة وصلة إليها في مقالات متعلقة بها. (أبريل 2020) المخاطر المهنية في طب الأسنان هي مخاطر مهنية ترتبط على وجه التحديد ببيئة العناية بالأسنان. يجب على أعضاء فريق طب الأسنان، بما في ذلك أطباء الأسنان، وأخصائيو ا

 

American politician Richard EckstromEckstrom in 202238th Comptroller General of South CarolinaIn officeJanuary 15, 2003 – April 30, 2023GovernorMark SanfordNikki HaleyHenry McMasterPreceded byJim LanderSucceeded byBrian J. GainesTreasurer of South CarolinaIn officeJanuary 11, 1995 – January 13, 1999GovernorDavid BeasleyPreceded byGrady PattersonSucceeded byGrady Patterson Personal detailsBorn (1948-06-23) June 23, 1948 (age 75)Duluth, Minnesota, U.S.Political partyR...

 

El problema del lenguaje religioso considera si es posible hablar acerca de Dios significativamente si se aceptan las concepciones tradicionales de Dios como un ser incorpóreo, infinito, e intemporal. Debido a que estas concepciones tradicionales de Dios hacen difícil describir a Dios, el lenguaje religioso tiene el potencial de carecer de sentido. Teorías del lenguaje religioso intentan demostrar que tal lenguaje carece de sentido, o que el lenguaje religioso aún puede tener sentido. Tra...

Indian cinematographer Sathyan SooryanBornTittakudi, Tamil Nadu, India[1]OccupationCinematographerYears active2011–presentSpouseHamsa Sathyan Sooryan is an Indian cinematographer who predominantly works in Tamil and Telugu films. He is an alumnus of the College of Fine Arts, Chennai. Career Sooryan was also an assistant to P. C. Sreeram.[2] He made his debut with Yuddham Sei (2011). In a review of the film by The Hindu, a critic noted that Cinematographer Sathya's contr...

 

Boundary of New Territories West constituency from 1998 to 2021, also the mostly-recognised boundary of the region New Territories West (NTW) is the western part of Hong Kong's New Territories, covering Yuen Long, Tuen Mun, Tsuen Wan, Kwai Tsing and the Islands District. History Settlements in the area, except the Islands District, have been connected by the Castle Peak Road since its completion in 1920s, which also links Kowloon and facilitates trading. In 1985, West New Territories and Sout...

 

Koordinat: 39°43′N 126°3′E / 39.717°N 126.050°E / 39.717; 126.050 (Wawon) Pertempuran WawonBagian dari Pertempuran Sungai Ch'ongch'on, Perang KoreaPeta Serangan balik Tiongkok, 28 November – 1 Desember 1950.Tanggal27–29 November 1950LokasiWawon, timur Kunu-ri, Korea UtaraHasil Kemenangan Tiongkok;Penundaan aksi Turki yang sukses[1]Pihak terlibat  Perserikatan Bangsa-Bangsa  Turki  Amerika Serikat  TiongkokTokoh dan pemimp...

SMA Negeri 7 SurabayaInformasiDidirikan25 September 1963JenisSekolah Menengah AtasAkreditasiANomor Pokok Sekolah Nasional20532261Kepala SekolahAlif Hanifah, M.Pd, M.SiJurusan atau peminatanIPA dan IPS dan BahasaRentang kelasX MIA, X IIS, X IBB XI MIA, XI IIS, XI IBB XII MIA, XII IIS, XII IBBKurikulumKurikulum 2013Jumlah siswa± 1000 siswaStatusNegeriAlamatLokasiJl. Ngaglik 27-29, Surabaya, Jawa Timur,  IndonesiaTel./Faks.031-3718085Koordinat7°14'52.8S 112°45'10.1ESitus w...

 

Church in Cumbria, EnglandAll Saints' Church, BoltongateAll Saints' Church from the southAll Saints' Church, BoltongateLocation in Cumbria54°45′22″N 3°11′55″W / 54.7560°N 3.1986°W / 54.7560; -3.1986OS grid referenceNY 229 407LocationBoltongate, CumbriaCountryEnglandDenominationAnglicanWebsiteAll Saints, BoltongateHistoryStatusParish churchArchitectureFunctional statusActiveHeritage designationGrade IDesignated11 April 1967Architectural typeChurchSpecificati...

 

Lukisan abad ke-18 dari fabel tersebut karya Sébastien Leclerc si muda Pria dengan Dua Simpanan adalah salah satu Fabel Aesop yang berkisah tentang manusia. Cerita tersebut diberi nomor 31 dalam Perry Index.[1] Fabel Seorang pria berusia menengah memiliki dua simpanan, yang satu lebih tua, dan yang satu lebih muda. Saat merias rambutnya, yang muda mewarnai rambutnya menjadi abu-abu sehingga terlihat mendekati usia yang tua, sementara yang tua mengecat rambutnya menjadi warna tua deng...

South African actress and painter This article is an orphan, as no other articles link to it. Please introduce links to this page from related articles; try the Find link tool for suggestions. (January 2019) Miemsie HeckroodtBornMiemsie RetiefSouth AfricaEducationHugo Naude Art Centre, UNISAOccupationActressYears active1959–1969SpouseFil Heckroodt Miemsie Retief is a South African actress and painter. She started her career as a model and made her acting debut in Nooi van my hart, Afri...

 

Human settlement in EnglandFringAll Saints Church, FringFringLocation within NorfolkArea6.93 km2 (2.68 sq mi)OS grid referenceTF737346Civil parishFringDistrictKing's Lynn and West NorfolkShire countyNorfolkRegionEastCountryEnglandSovereign stateUnited KingdomPost townKING'S LYNNPostcode districtPE31PoliceNorfolkFireNorfolkAmbulanceEast of England List of places UK England Norfolk 52°52′54″N 0°34′52″E / 52.881562°N 0.581074°E&...

 

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Atlantis 1991 film – news · newspapers · books · scholar · JSTOR (May 2014) (Learn how and when to remove this template message) 1991 French filmAtlantisBlu-ray front coverDirected byLuc BessonWritten byLuc BessonProduced byLuc BessonCinematographyLuc Bess...

Víktor Guérmanovich Kazántsev Información personalNacimiento 22 de febrero de 1946 Kochanava (Bielorrusia) Fallecimiento 14 de septiembre de 2021 (75 años)Krasnodar (Rusia) Nacionalidad Rusa y soviéticaEducaciónEducación PhD in Philosophical Sciences y Doctor of Pedagogy Sciences Educado en Academia Militar del Estado Mayor de las Fuerzas Armadas de RusiaEkaterinburg Military AcademySaint Petersburg Combined-Arms Command High SchoolAcademia Militar Mijaíl V. Frunze Información profe...

 

German general Walter HörnleinWalter Hörnlein (center)Born(1893-01-02)2 January 1893Died14 September 1961(1961-09-14) (aged 68)Allegiance Nazi GermanyService/branchArmyRankGeneral of the InfantryCommands heldGroßdeutschland DivisionBattles/warsWorld War I World War IIAwardsKnight's Cross of the Iron Cross with Oak Leaves Walter Hörnlein (2 January 1893 – 14 September 1961) was a German general in the Wehrmacht during World War II, who commanded the Großdeutschland Division. H...

 

Badan Rekonstruksi復興庁Fukkō-chōGedung Pemerintah Pusat No. 4, tempat Kantor Pusat Badan Rekonstruksi Tokyo berada.Informasi lembagaDibentuk10 Februari 2012 (2012-02-10)Nomenklatur sebelumnyaMarkas Besar Rekonstruksi sebagai tanggapan atas Gempa bumi besar Jepang TimurWilayah hukum JepangKantor pusatGedung Pemerintah Pusat No. 4, 1-1 Kasumigaseki 3-chome, Chiyoda-ku, Tokyo 100-0013, Jepang35°40′23.3″N 139°44′52.8″E / 35.673139°N 139.748000°E...

João Paulo Cunha Brazilian politician João Paulo Cunha (born 1958) is a deputy of the Brazilian Workers Party from São Paulo and was elected President of the Chamber of Deputies in 2003.[1] He left this position in 2005.[2][3] In August 2012, whilst running the Brazilian municipal election in Osasco, Cunha was forced to pull out after he was convicted of corruption and money laundering. According to the accusation he received $24,000 (£15,000) from a businessman wh...

 

Bagian dari sebuah serial tentangSepuluhPerintah Allah Akulah TUHAN Allahmu Jangan ada allah lain Jangan membuat patung apa pun Jangan sembarangan menyebut nama TUHAN Kuduskanlah hari Sabat Hormatilah ayahmu dan ibumu Jangan membunuh Jangan berzinah Jangan mencuri Jangan bersaksi dusta Jangan mengingini Artikel terkait Loh Batu Dekalog Ritual Teologi Katolik lbs Jangan mencuri adalah salah satu dari Sepuluh Perintah Allah[1] yang terdapat dalam Taurat (dan Perjanjian Lama sebagai perl...

 

Strategi Solo vs Squad di Free Fire: Cara Menang Mudah!