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HD 222095

HD 222095
Observationsdata
Epok: J2000.0
StjärnbildFenix
Rektascension23t 37m 50,99418 s[1]
Deklination-45° 29′ 32,4672 ″[1]
Skenbar magnitud ()+4,74 (V)[2]
Stjärntyp
SpektraltypA1/2 V[3]
U–B+0,09[2]
B–V+0,08[2]
Astrometri
Radialhastighet ()+3,40[4] km/s
Egenrörelse (µ)RA: +70,71[1] mas/år
Dek.: -12,66[1] mas/år
Parallax ()16,29 ± 0,22[1]
Avstånd200 ± 3 lå (61,4 ± 0,8 pc)
Absolut magnitud ()+0,80[5]
Detaljer
Massa2,55[6] M☉
Radie2,2[7] R☉
Luminositet41,42[5] L☉
Temperatur9 230[1] K
Metallicitet-0,01 (Fe/H) [8] dex
Vinkelhastighet141[6] km/s
Ålder482[5] miljoner år
Andra beteckningar
CD-46 14720, CPD-46 10567, FK5 889, GSC 08456-00967, HIC 116602, HIP 116602, HR 8959, IRAS 23351-4546, 2MASS J23375099-4529324, PLX 5714, PPM 329482, SAO 231707, TD1 29970, TYC 8456-967-1, uvby98 100222095, Gaia DR2 6525687925594210816 [9][10]

HD 222095 är en ensam stjärna[11] i den mellersta delen av stjärnbilden Fenix. Den har en skenbar magnitud av ca 4,74[2] och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 16,3[1] mas, beräknas den befinna sig på ett avstånd på ca 200 ljusår (ca 61 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 3 km/s.[4]

Egenskaper

HD 222095 är en vit till blå stjärna i huvudserien av spektralklass A1/2 V.[3] Den har en massa som är ca 2,6[6] solmassor, en radie som är ca 2,2[7] solradier och har ca 41 gånger solens utstrålning av energi[5] från dess fotosfär vid en effektiv temperatur av ca 9 200 K.[6]

HD 222095 roterar snabbt med en projicerad rotationshastighet av 141[6] till 165 km/s vilket ger den en ekvatoriell radie som är 4 procent större än polarradien.[12]

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, HD 222095, 9 oktober 2020..

Noter

  1. ^ [a b c d e f g] 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. S2CID 18759600. Vizier catalog entry
  2. ^ [a b c d] Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
  3. ^ [a b] Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. 2. Ann Arbor: Dept. of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
  4. ^ [a b] Gontcharov, G. A. (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. S2CID 119231169.
  5. ^ [a b c d] 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 119257644. Vizier catalog entry
  6. ^ [a b c d e] David, Trevor J.; Hillenbrand, Lynne A. (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. S2CID 33401607. Vizier catalog entry
  7. ^ [a b] Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics (Third ed.), 367 (2): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754
  8. ^ Gontcharov, G. A. (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. S2CID 118345778. Vizier catalog entry
  9. ^ HD 222095 (u-strasbg.fr)|Hämtad 2022-01-20.
  10. ^ "HD 222095". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 2019-11-19.
  11. ^ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
  12. ^ van Belle, Gerard T. (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. S2CID 119273474.
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Stjärnor i Fenix
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