Psi2 Draconis

Psi2 Draconis
ψ² Draconis
Stjärnbilden Draken (Draco)
Observationsdata
Epok: J2000
StjärnbildDraken
Rektascension17t 55m 11,15s
Deklination72° 00′ 18,46″[1]
Skenbar magnitud ()5,43[2]
Stjärntyp
SpektraltypF2III [1]
U–B+0,15[3]
B–V+0,30[3]
Astrometri
Radialhastighet ()-2,0 ± 0,25[4] km/s
Egenrörelse (µ)RA: 8,33 ± 0,21[5] mas/år
Dek.: -2,48 ± 0,25[5] mas/år
Parallax ()3,09 ± 0,20[5]
Avstånd930 ± 20 lå (287 ± 7 pc)
Absolut magnitud ()-2,12 ± 0,14[6]
Detaljer
Massa2,02[4] M☉
Radie16,78[2] R☉
Luminositet534[7] L☉
Temperatur6 874 ± 259[4] K
Metallicitet-1,29[4]
Ålder800[4] miljoner år
Andra beteckningar
34 Draconis, GCRV 10409, HR 6725, SKY# 32467, psi02 Dra, GEN# +1.00164613, IRAS 17560+7200,TD1 21458, AG+72 485, GSC 04436-01426, 2MASS, J17551110+7200185, TYC 4436-1426-1, BD+72 818, HD 164613, PMC 90-93 1403, uvby98 100164613, FK5 3429, C 87728, PPM 9681, GC 24459, HIP 87728, SAO 8961[1]

Psi2 Draconis (ψ² Draconis) är en vit jättestjärna i stjärnbilden Draken.[1]

Den befinner sig på 723,2 ljusårs (221 parsec) avstånd från Jorden och kan ses med blotta ögat på norra stjärnhimlen, med en skenbar magnitud på 5,43.[2][1]

Egenskaper

Spektralklass F2III

F2

Psi2 Draconis är av spektraltyp/-klass F2III,[1] där "F2" innebär att den är vit och har en fotosfär-temperatur på omkring 6 900 K.[4] Den är så något svalare än den tidigare A-klassen men varmare än vår sol som är av spektralklass G2V.

Hos stjärnor av spektralklass F syns inte lika starka väte-linjer som hos A-klassen och det har istället börjat synas mer absorptionslinjer från de mindre metallerna.[8]

III

Psi2 Draconis avger ca 530 gånger mer energi än solen från dess fotosfär.[7] Beteckningen "III" anger att luminositeten, ljusstyrkan, är betydligt större än hos en huvudseriestjärna med samma temperatur. Ju högre siffra desto lägre luminositet, och "V" motsvarar ljusstyrkan hos huvudseriestjärnor, den vanligaste gruppen stjärnor i sin spektralklass.

Detta innebär att Psi2 Draconis också är betydligt större än de flesta och den är klassificerad som en jättestjärna. Den beräknas ha en massa som är omkring dubbelt så stor[4] som solens massa och en radie som är ca 17 gånger solens.[2]

Referenser

  1. ^ [a b c d e f] Psi02 Dra. SIMBAD Astronomical Database. Hämtdatum 11 februari 2016.
  2. ^ [a b c d] Psi2 Draconis Universe Guide. Hämtdatum 20 januari 2019.
  3. ^ [a b] Oja, T. (April 1983), "UBV photometry of FK4 and FK4 supplement stars", Astronomy and Astrophysics Supplement Series, 52: 1311–34, Bibcode:1983A&AS...52..131O.
  4. ^ [a b c d e f g] Casagrande, L.; et al. (2011), "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey", Astronomy & Astrophysics, 530 (A138): 21, arXiv:1103.4651, Bibcode:2011A&A...530A.138C, doi:10.1051/0004-6361/201016276.
  5. ^ [a b c] van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  6. ^ Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191.
  7. ^ [a b] McDonald, I.; et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.
  8. ^ Spektralklasse F Arkiverad 22 juli 2018 hämtat från the Wayback Machine. Spektrographie.wikispaces.com. Läst 25 juli 2017.

Externa länkar

v • r
Stjärnor i Draken
Bayer
Flamsteed
Variabler
HD
Övriga

Read other articles:

Assassinio di Martin Luther King

Voce principale: Martin Luther King. Assassinio di Martin Luther King Jr.omicidioMartin Luther King nel 1964 Data4 aprile 1968 LuogoLorraine Motel, Memphis Stato Stati Uniti Coordinate35°08′04.34″N 90°03′27.25″W / 35.13454°N 90.05757°W35.13454; -90.05757Coordinate: 35°08′04.34″N 90°03′27.25″W / 35.13454°N 90.05757°W35.13454; -90.05757 ResponsabiliJames Earl Ray e Loyd Jowers ConseguenzeMorti1 Feriti0 Modifica dati su Wikidata ...

 

Bay City, Michigan

Bay city (Amerika Serikat) Bay City ialah sebuah kota kecil di Amerika Serikat di negara bagian Michigan. Pada sensus 2000 kota ini memiliki lebih dari 35.000 penduduk. Meski kecil, Bay City ialah salah satu kota pelabuhan terbesar di Danau Huron, salah satu Danau-danau Besar Amerika Utara. Merupakan bagian dari segitiga kota-kota kecil di Michigan Tengah. Kedua kota lainnya ialah Saginaw, Michigan, dan Midland, Michigan. Bay City merupakan tempat kelahiran Madonna Ciccone, penyanyi terkenal ...

 

IMI Radio

IMI Radio (PM2FGD)PT Radio Swara Rhadana DuniaKotaJakartaWilayah siarJabodetabek dan sekitarnyaFrekuensi96.7 FMMulai mengudara1993 (sebagai Radio A)2014 (sebagai Hitz FM)2022 (sebagai IMI Radio)FormatCHRBahasaIndonesianOtoritas perizinanKementerian Komunikasi dan Informatika Republik IndonesiaKelasAMakna tanda panggilIkatan Motor Indonesia RadioNama sebelumnyaRadio AHitz FMFrekuensi sebelumnya91.45 FMPemilikIndika Group (2014-2018)Indika Multimedia (2018-2022)Ikatan Motor Indonesia (2022-seka...

Tuberkulosis

Artikel ini memberikan informasi dasar tentang topik kesehatan. Informasi dalam artikel ini hanya boleh digunakan untuk penjelasan ilmiah; bukan untuk diagnosis diri dan tidak dapat menggantikan diagnosis medis. Wikipedia tidak memberikan konsultasi medis. Jika Anda perlu bantuan atau hendak berobat, berkonsultasilah dengan tenaga kesehatan profesional. TuberkulosisHasil Sinar-X dada seorang penderita Tuberkulosis tingkat lanjut. Panah putih menunjukkan adanya infeksi pada kedua belah paru-pa...

 

Utanapada

Artikel ini tidak memiliki referensi atau sumber tepercaya sehingga isinya tidak bisa dipastikan. Tolong bantu perbaiki artikel ini dengan menambahkan referensi yang layak. Tulisan tanpa sumber dapat dipertanyakan dan dihapus sewaktu-waktu.Cari sumber: Utanapada – berita · surat kabar · buku · cendekiawan · JSTOR Dalam mitologi Hindu, Utanapada (Sanskerta: उत्तानपाद; Uttānapāda) adalah nama seorang raja, putra Swayambu Manu dan Sata...

 

Ohio History Center

History museum in Columbus, Ohio Ohio History CenterEstablishedAugust 23, 1970 (1970-08-23)Location800 E. 17th Avenue,Columbus, OhioCoordinates40°00′17″N 82°59′15″W / 40.004858°N 82.987418°W / 40.004858; -82.987418AccreditationAmerican Alliance of MuseumsKey peopleBurt Logan (Executive Director and CEO), Thomas V. Chema (President)ArchitectIreland & AssociatesOwnerOhio History ConnectionNearest parkingSurface lotsWebsitewww.ohiohistory.or...

Punta Maroma

Place in Quintana Roo, MexicoPunta MaromaPunta MaromaLocation in MexicoCoordinates: 20°43′49″N 86°57′54″W / 20.73028°N 86.96500°W / 20.73028; -86.96500Country MexicoState Quintana RooMunicipalitySolidaridadHighest elevation7 m (23 ft)Lowest elevation0 m (0 ft)Time zoneUTC-5 (EST)Postal code77710Area code998 Punta Maroma is a beach located in Mexico's easternmost state, Quintana Roo, on the Yucatán Peninsula. The beach of ...

 

Koszalin University of Technology

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: Koszalin University of Technology – news · newspapers · books · scholar · JSTOR (February 2013) (Learn how and when to remove this template message) Koszalin University of TechnologyPolitechnika KoszalińskaLatin: Polytechnica CoslinensisEstablished1968RectorDr...

 

List of boxing quadruple champions

A quadruple champion in boxing refers to a boxer who has won world titles in four different categories of weight. Recognition Major sanctioning bodies There is some dispute on which sanctioning body is considered major enough to award championships. The Big 4 sanctioning bodies are always included. They are arranged in order of foundation: World Boxing Association (WBA) - founded in 1921 World Boxing Council (WBC) - founded in 1963 International Boxing Federation (IBF) - founded in 1976 Worl...

Louis Alexander Fagan

British writer (1845–1903) Louis Alexander FaganLouis Alexander Fagan by John Singer SargentBorn7 February 1845Naples, Kingdom of the Two SiciliesDied5 January 1903FlorenceNationalityItalian/BritishEmployerBritish Museum Louis Alexander Fagan (7 February 1845 – 5 January 1903) was an Anglo-Italian writer and artist. He worked in the Department of Prints and Drawings for the British Museum from 1869 to 1894, and wrote various books on the department. A painting of his by John Singer Sargen...

 

Bahasa Helong

Bahasa HelongBPS: 0135 3 Helon, Kupang, Semau Lokasi penuturan bahasa Helong berwarna biru (ujung barat). Dituturkan diIndonesiaWilayahTimor BaratPenutur14.000 (1997)[1] Rumpun bahasaAustronesia Melayu-PolinesiaTengah–TimurTimorikTimor BaratHelong DialekFunai Helong Daratan Helong Pulau Kode bahasaISO 639-3hegGlottologhelo1243[2]ELPHelongBPS (2010)0135 3 Status pemertahanan Punah EXSingkatan dari Extinct (Punah)Terancam CRSingkatan dari Critically endangered (Teran...

 

Keld Heick

Danish singer, songwriter and musician (born 1946) Keld Heick Keld Heick (born 24 February 1946 in Frederiksberg) is a Danish singer, songwriter and musician. He is best known for his contribution to the Dansk Melodi Grand Prix, where he has submitted over 30 songs. In 1963 Heick formed the band Keld & the Donkeys. The band's big breakthrough came in 1966 with the song Ved landsbyens gadekær (eng. At the village pond).[1] In 1976 he decided to merge his professional and personal ...

哈萨克斯坦总统

此条目序言章节没有充分总结全文内容要点。 (2019年3月21日)请考虑扩充序言，清晰概述条目所有重點。请在条目的讨论页讨论此问题。 哈萨克斯坦總統哈薩克總統旗現任Қасым-Жомарт Кемелұлы Тоқаев卡瑟姆若马尔特·托卡耶夫自2019年3月20日在任任期7年首任努尔苏丹·纳扎尔巴耶夫设立1990年4月24日（哈薩克蘇維埃社會主義共和國總統） 哈萨克斯坦 哈萨克斯坦政府...

 

Samuel S. Lewis

American politician Samuel S. Lewis17th Lieutenant Governor of PennsylvaniaIn officeJanuary 17, 1939 – January 19, 1943GovernorArthur JamesPreceded byThomas KennedySucceeded byJohn Bell57th Treasurer of PennsylvaniaIn officeJanuary 20, 1925 – January 15, 1929GovernorGifford PinchotJohn Stuchell FisherPreceded byCharles SnyderSucceeded byEdward Martin22nd Auditor General of PennsylvaniaIn officeJanuary 18, 1921 – January 20, 1925GovernorWilliam Cameron Spro...

 

San Marino at the 1980 Summer Olympics

Sporting event delegationSan Marino at the1980 Summer OlympicsFlag of the Olympic MovementIOC codeSMRNOCComitato Olimpico Nazionale SammarineseWebsitewww.cons.sm (in Italian)in MoscowCompetitors16 in 5 sportsMedals Gold 0 Silver 0 Bronze 0 Total 0 Summer Olympics appearances (overview)19601964196819721976198019841988199219962000200420082012201620202024 San Marino competed at the 1980 Summer Olympics in Moscow, USSR. Sixteen competitors, all men, took part in ten events in five sports.&#...

United States Department of State

Executive department of the U.S. federal government Department of State redirects here. For other uses, see Department of State (disambiguation). For the general topic, see Ministry of foreign affairs. United States Department of StateSeal of the Department of StateFlag of the Department of StateDepartment of State headquartersAgency overviewFormedJuly 27, 1789; 234 years ago (1789-07-27)Preceding agencyDepartment of Foreign AffairsTypeExecutive departmentJurisdictionU.S. fe...

 

Corrinne Tarver

American gymnastics coach (born 1968) Corrinne TarverAlternative name(s)Corrinne WrightBorn1968 (age 55–56)HometownMount Vernon, New York, U.S.Height4 ft 9 in (145 cm)[a]Years on national team1985–1986 (U.S.)College teamGeorgia (1987–1990)Former coach(es)Suzanne Yoculan (Georgia) Medal record Representing Georgia GymDogs NCAA Championships 1987 Salt Lake City Team 1989 Athens Team 1989 Athens All Around 1989 Athens Floor 1987 Salt Lake City Floor 198...

 

Budget de l'État français

Pour des articles plus généraux, voir Finances publiques en France et Budget de l'État. Le budget de l'État français est une prévision des dépenses et des recettes de l'État français, voté chaque année par le Parlement dans une loi de finances. Les principales dépenses du budget général prévues par la loi de finances initiales, hors remboursements et dégrèvements, sont dans cet ordre l’enseignement scolaire, la défense, les engagements financiers de l’État puis la rech...

Barong (mythology)

Character in Balinese mythology For other uses, see Barong. 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: Barong mythology – news · newspapers · books · scholar · JSTOR (April 2024) (Learn how and when to remove this message) BarongᬩᬭᭀᬂBarong, a Balinese mythological creatureCountryIndonesiaRe...

 

Scouting in Utah

Scouting in Utah Scouts at Camp Tracy Scouts at Topaz Center Girl Scouts  Scouting portal Scouting in Utah has a long history,[1] from the 1910s to the present day, serving thousands of youth in programs that suit the environment in which they live. History The first known Boy Scout Troop was the Episcopalian Troop One led by Reverend Rice, a missionary to Utah. This troop assembled in 1907 and continued their meetings and camp-outs through 1910.[2] The second known Boy ...