HD 218108

HD 218108
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Octans
Right ascension 23h 08m 23.84044s[1]
Declination −79° 28′ 50.4748″[1]
Apparent magnitude (V) 6.11±0.01[2]
Characteristics
Spectral type A6 Vn[3]
U−B color index +0.10[4]
B−V color index +0.14[4]
Astrometry
Radial velocity (Rv)−7±4.4[5] km/s
Proper motion (μ) RA: +93.016 mas/yr[1]
Dec.: −35.907 mas/yr[1]
Parallax (π)13.1893 ± 0.0236 mas[1]
Distance247.3 ± 0.4 ly
(75.8 ± 0.1 pc)
Absolute magnitude (MV)+1.78[6]
Details
Mass1.80[7] M☉
Radius2±0.1[8] R☉
Luminosity15.24[9] L☉
Surface gravity (log g)4.17±0.07[10] cgs
Temperature8,213±244[11] K
Metallicity [Fe/H]−0.01[12] dex
Rotational velocity (v sin i)194±2[13] km/s
Age249[7] Myr
Other designations
79 G. Octantis[14], CPD−80°1064, FK5 3847, GC 32194, HD 218108, HIP 114258, HR 8786, SAO 258105[15]
Database references
SIMBADdata

HD 218108, also known as HR 8786, is a solitary, white hued star located in the southern circumpolar constellation Octans. It has an apparent magnitude of 6.11,[2] making it faintly visible to the naked eye under ideal conditions. Based on parallax measurements from Gaia DR3, the object is estimated to be 247 light years away.[1] It appears to be approaching the Solar System with a fairly constrained radial velocity of −7 km/s.[5] Paunzen et al. (2001) lists it as a λ Boötis star with a weak magnesium line.[16]

HD 218108 has a stellar classification of A6 Vn,[3] indicating that it is an A-type main-sequence star with broad or nebulous absorption lines due to rapid rotation. In 1966, David Stanley Evans gave it a slightly cooler class of A7 Vn.[17] However, Houk and Cowley (1975) give it a classification of A3/4 V, a main sequence star with the characteristics of an A3 and A4 star.[18] Paunzen et al. (2001) gives it a class of A3 V, indicating that it is instead an ordinary A-type main-sequence star.[16]

Nevertheless, it has 1.8 times the mass of the Sun[7] and twice its radius.[8] It radiates 15.24 times the luminosity of the Sun[9] from its photosphere at an effective temperature of 8,213 K. It is estimated to be 249 million years old[7] and is currently spinning with a high projected rotational velocity of 149 km/s.[13] A solar metallicity was calculated for HD 218108.[12]

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.
  3. ^ a b 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.
  4. ^ a b Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
  5. ^ a b Gontcharov, G. A. (November 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. eISSN 1562-6873. ISSN 1063-7737. S2CID 119231169.
  6. ^ 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.
  7. ^ a b c d David, Trevor J.; Hillenbrand, Lynne A. (12 May 2015). "The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv:1501.03154. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146. eISSN 1538-4357.
  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 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.
  10. ^ 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.
  11. ^ 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.
  12. ^ a b Gontcharov, G. A. (December 2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. eISSN 1562-6873. ISSN 1063-7737.
  13. ^ a b Díaz, C. G.; González, J. F.; Levato, H.; Grosso, M. (July 2011). "Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum". Astronomy & Astrophysics. 531: A143. arXiv:1012.4858. Bibcode:2011A&A...531A.143D. doi:10.1051/0004-6361/201016386. eISSN 1432-0746. ISSN 0004-6361.
  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. ^ "HD 218108". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 22, 2022.
  16. ^ a b Paunzen, E.; Duffee, B.; Heiter, U.; Kuschnig, R.; Weiss, W. W. (July 2001). "A spectroscopic survey for λ Bootis stars". Astronomy & Astrophysics. 373 (2): 625–632. Bibcode:2001A&A...373..625P. doi:10.1051/0004-6361:20010630. eISSN 1432-0746. ISSN 0004-6361.
  17. ^ Evans, D. S. (1966). "Fundamental data for Southern stars (6th list)". Royal Greenwich Observatory Bulletins. 110: 185. Bibcode:1966RGOB..110..185E.
  18. ^ Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations −90° to −53°. Bibcode:1975mcts.book.....H.

Read other articles:

Saint-Vitte-sur-Briance

Peta infrastruktur dan tata guna lahan di Komune Saint-Vitte-sur-Briance.  = Kawasan perkotaan  = Lahan subur  = Padang rumput  = Lahan pertanaman campuran  = Hutan  = Vegetasi perdu  = Lahan basah  = Anak sungaiSaint-Vitte-sur-Briance merupakan sebuah komune di departemen Haute-Vienne di Prancis. Lihat pula Komune di departemen Haute-Vienne Referensi INSEE lbsKomune di departemen Haute-Vienne Aixe-sur-Vienne Ambazac Arnac-la-Poste Augne Aureil Azat-le-...

 

Bourg-en-Bresse

Pusat kota Bourg-en-Bresse Bourg-en-Bresse merupakan sebuah munisipalitas di Prancis bagian barat. Kota ini terletak 36 km timur laut dari Lyon. Penduduknya berjumlah 40.666 jiwa (1999). Luas wilayah 23,86 km². Terletak di bagian barat pegunungan Jura. Kota kembar Bad Kreuznach, Jerman Aylesbury, Inggris San Severo, Italia Parma, Italia Namur, Belgia Córdoba, Spanyol Lihat pula Bressan Arpitania Bahasa Arpitan Pranala luar Wikimedia Commons memiliki media mengenai Bourg-en-Bresse....

 

Chandan Roy Sanyal

Chandan Roy SanyalSanyal (kiri) di acara Esha Deol's SangeetLahirChandan Roy SanyalNew Delhi, IndiaPekerjaanPemeran, Peraga busanaTahun aktif2006–sekarang Chandan Roy Sanyal (kelahiran 30 Januari) adalah seorang pemeran asal India yang dikenal atas karyanya dalam film Hindi dan Bengali.[1] Setelah lulus dengan gelar dalam bidang matematika, ia membuat debut aktingnya dalam film 2006 Rang de Basanti, dalam sebuah peran kecil. Referensi ^ Discovery Of Chandan Roy Sanyal. Calcutt...

جامعة محمد السادس لعلوم الصحة

جامعة محمد السادس لعلوم الصحة شعار جامعة محمد السادس لعلوم الصحة معلومات التأسيس 2014 النوع جامعة غير ربحية لغات التدريس الفرنسية الموقع الجغرافي إحداثيات 33°35′10″N 7°37′38″W / 33.586004514067°N 7.6272314576732°W / 33.586004514067; -7.6272314576732[1]  المدينة الدار البيضاء المكان الدار �...

 

فوكوان، قويتشو

فوكوان، قويتشو 福泉市    خريطة الموقع تقسيم إداري البلد  الصين[1] خصائص جغرافية إحداثيات 26°42′14″N 107°30′31″E / 26.70387°N 107.50868°E / 26.70387; 107.50868   [2] المساحة 1692.37 كيلومتر مربع  السكان التعداد السكاني 283904 (2010)  الكثافة السكانية 167.7 نسمة/كم2 معلومات أخرى...

 

Futbol'nyj Klub Dinamo Sankt-Peterburg

FK Dinamo San PietroburgoCalcio Segni distintivi Uniformi di gara Casa Trasferta Colori sociali Dati societari Città San Pietroburgo Nazione  Russia Confederazione UEFA Federazione RFU Fondazione 1923 Scioglimento1953Rifondazione1960Scioglimento2003Rifondazione2007Scioglimento2018 Presidente Leonid Tsapu Stadio Stadio Petrovskij(21.570 posti) Sito web www.fc-dynamospb.ru Palmarès Si invita a seguire il modello di voce Il Futbol'nyj Klub Dinamo Sankt-Peterburg (in russo Футбо...

Home (Kobi Marimi song)

2019 song by Kobi Marimi HomeSingle by Kobi MarimiReleased10 March 2019Recorded2019LabelUnicellSongwriter(s)Ohad ShragaiInbar WizmanProducer(s)Amos Ben DavidKobi Marimi singles chronology Home (2019) Yalla Bye (2019) Music videoHome on YouTubeEurovision Song Contest 2019 entryCountryIsraelArtist(s)Kobi MarimiLanguagesEnglishComposer(s)Ohad ShragaiInbar WizmanLyricist(s)Ohad ShragaiInbar WizmanFinals performanceFinal result23rdFinal points35Entry chronology◄ Toy (2018)Feker Libi (2020) ► H...

 

Bulan Sejarah Hitam

Bulan Sejarah HitamPerayaan Bulan Sejarah Hitam oleh Wikipedia pada 2020Nama lainBulan Sejarah Afrika-AmerikaDirayakan olehAmerika Serikat, Kanada,[1] Britania Raya[2]MaknaPerayaan diaspora Afrika termasuk sejarah Afrika-AmerikaTanggal Februari (AS dan Kanada) Oktober (Eropa) FrekuensiTahunan Bulan Sejarah Hitam adalah peringatan tahunan yang berasal dari Amerika Serikat, yang juga dikenal sebagai Bulan Sejarah Afrika-Amerika. Ini telah menerima pengakuan resmi dari pemerintah...

 

Fuga da Seattle

Questa voce sull'argomento film d'azione è solo un abbozzo. Contribuisci a migliorarla secondo le convenzioni di Wikipedia. Segui i suggerimenti del progetto di riferimento. Fuga da SeattleJake Gyllenhaal e Jared Leto in una scena del filmTitolo originaleHighway Paese di produzioneStati Uniti d'America Anno2002 Durata97 min Genereazione RegiaJames Cox SceneggiaturaScott Rosenberg ProduttoreScott Rosenberg, Guy Riedel Produttore esecutivoMichal Gruber, Donna Langley FotografiaMauro Fior...

Associazione Calcio Reggiana 1994-1995

Voce principale: Associazione Calcio Reggiana 1919. AC ReggianaStagione 1994-1995Sport calcio Squadra Reggiana Allenatore Giuseppe Marchioro, poi Enzo Ferrari[1], poi Cesare Vitale[2] Presidente Luciano Fantinel Serie A17º (retrocesso in Serie B) Coppa ItaliaTerzo turno Maggiori presenzeCampionato: De Agostini (33) Miglior marcatoreCampionato: Padovano (7) StadioMirabello, poiGiglio[3] Abbonati10 596 Maggior numero di spettatori22 662 vs Juventus(15 ap...

 

Сергеев, Феофан Сергеевич

В Википедии есть статьи о других людях с фамилией Сергеев.Феофан Сергеевич Сергеев Основные сведения Страна  Российская империя →  СССР Дата рождения 19 декабря 1906(1906-12-19) Место рождения Бичурино, Чебоксарский уезд, Казанская губерния, Российская империя Дата...

 

Несторианство

ХристианствоБиблия Ветхий Завет Новый Завет Евангелие Десять заповедей Нагорная проповедь Апокрифы Бог, Троица Бог Отец Иисус Христос Святой Дух История христианства Апостолы Хронология христианства Раннее христианство Гностическое христианство Вселенские соборы Н...

2016年美國總統選舉

2016年美國總統選舉 ← 2012 2016年11月8日 2020 → 538個選舉人團席位獲勝需270票民意調查投票率55.7%[1][2] ▲ 0.8 %   获提名人 唐納·川普 希拉莉·克林頓 政党 共和黨 民主党 家鄉州 紐約州 紐約州 竞选搭档 迈克·彭斯 蒂姆·凱恩 选举人票 304[3][4][註 1] 227[5] 胜出州/省 30 + 緬-2 20 + DC 民選得票 62,984,828[6] 65,853,514[6]...

 

Hiram Percy Maxim

American inventor Hiram Percy MaximHiram Percy Maxim, c.1914Born(1869-09-02)September 2, 1869Brooklyn, New YorkDiedFebruary 17, 1936(1936-02-17) (aged 66)La Junta, ColoradoResting placeRose Hill CemeteryAlma materMassachusetts Institute of Technology (1886)OccupationInventorSpouseJosephine HamiltonChildrenHiram Hamilton Maxim Percy Maxim LeeParentHiram Stevens MaximRelativesHudson Maxim (uncle)Call signW1AW (most notable) Hiram Percy Maxim (September 2, 1869 – February 17, 193...

 

Töölö Sports Hall

Sports venue in Helsinki, Finland Töölö Sports HallFinnish: Töölön kisahalliSwedish: Tölö sporthallTöölö Sports Hall photographed from the tower of the Olympic Stadium (2004)Former namesMessuhalliAddressPaavo Nurmen kuja 1cLocationTaka-Töölö, Helsinki, FinlandCoordinates60°11′00″N 024°55′32″E / 60.18333°N 24.92556°E / 60.18333; 24.92556Capacity2,000 (seated)ConstructionBuilt1935Opened1935Expanded1952ArchitectAarne HytönenRisto-Veikko Luukkone...

The Legend of Sword and Fairy 6

2015 video game 2015 video gameChinese Paladin 6Developer(s)Softstar Technology (Beijing) Co. Ltd.Publisher(s)TW: SoftstarCHN: ChangyouNA: EastAsiaSoftDirector(s)Yao ZhuangxianProducer(s)Luan JingComposer(s)Zeng ZhihaoWu XinruiZhou ZhihuaSeriesThe Legend of Sword and FairyEngineUnityPlatform(s)Microsoft WindowsXbox OnePlayStation 4ReleaseMicrosoft WindowsTW: July 8, 2015CHN: July 8, 2015WW: November 14, 2017 (Steam)PlayStation 4NA: April 2, 2019CHN: April 2, 2019Xbox OneTBAGenre(s)Role-playin...

 

Food prices

Average price level for food across countries, regions and on a global scale The Food and Agriculture Organization (FAO) Food Price Index 1961–2021 in nominal and real terms. The Real Price Index is the Nominal Price Index deflated by the World Bank Manufactures Unit Value Index (MUV). Years 2014–2016 is 100. Food prices refer to the average price level for food across countries, regions and on a global scale.[1] Food prices affect producers and consumers of food. Price levels dep...

 

Action Lab Comics

American comic book publisher This article relies excessively on references to primary sources. Please improve this article by adding secondary or tertiary sources. Find sources: Action Lab Comics – news · newspapers · books · scholar · JSTOR (January 2020) (Learn how and when to remove this message) Action Lab Entertainment / Action Lab ComicsIndustryPublishingFoundedOctober 2010; 13 years ago (October 2010)FounderShawn Pryor, Dave Dwonch...

Edgar Snow

Edgar Snow (kiri) bersama dengan Zhou Enlai dan istrinya Deng Yingchao, sekitar 1938. Setengah abu Edgar Snow dikuburkan di kampus Universitas Peking, Beijing, di samping Danau Weiming. Edgar Parks Snow (17 Juli 1905 – 15 Februari 1972) adalah seorang jurnalis Amerika yang dikenal karena buku-buku dan artikel-artikel buatannya tentang Komunisme di China dan revolusi Komunis Tiongkok. Ia adalah jurnalis Barat pertama yang memberikan catatan penuh dari sejarah Partai Komunis Tiongkok setelah ...

 

جامع يزد

جامع يزد إحداثيات 31°54′05″N 54°22′07″E / 31.901388888889°N 54.368611111111°E / 31.901388888889; 54.368611111111   [1] معلومات عامة الموقع يزد[2][3]  القرية أو المدينة يزد، محافظة يزد الدولة  إيران الارتفاع عن سطح الأرض 52 متر[4]  تاريخ الافتتاح الرسمي القرن 9[3]،  و1119 ...