HD 168592

HD 168592
Observationsdata
Epok: J2000.0
StjärnbildSödra kronan
Rektascension18t 22m 18,57340s[1]
Deklination-38° 39′ 24,8261″[1]
Skenbar magnitud ()5,07 ± 0,01[2]
Stjärntyp
SpektraltypK4/5 III[3]
B–V+1,49[4]
Astrometri
Radialhastighet ()+17,8 ± 2,8[5] km/s
Egenrörelse (µ)RA: -41,570[1] mas/år
Dek.: -29,379[1] mas/år
Parallax ()6,7176 ± 0,1706[1]
Avstånd490 ± 10  (149 ± 4 pc)
Absolut magnitud ()-0,76[6]
Detaljer
Massa1,18[7] M
Radie43,6 ± 2,2[8] R
Luminositet666 +44−40[1] L
Temperatur4 148 ± 122[9] K
Metallicitet-0,13 ± 0,01[10]
Vinkelhastighet1,9 ± 1,3<[11] km/s
Andra beteckningar
7 G Coronae Australis,[12] HD 168592, CD-38 12729, CPD-38 7475, GSC 07901-03102, HIC 90037, HIP 90037, HR 6862, IRAS 18188-3840, 2MASS J18221857-3839246, PLX 4209, PPM 297606, RAFGL 6985S, SAO 210048, TYC 7901-3102-1, Gaia DR2 6727439895482929536, Gaia DR3 6727439895482929536[13][14]

HD 168592 eller HR 6862, är en ensam stjärna[15] belägen i norra delen av stjärnbilden Södra kronan. Den har en skenbar magnitud av ca 5,07[2] och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 3 på ca 6,72 mas[1] beräknas den befinna sig på ett avstånd av ca 490 ljusår (ca 149 parsec) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet av ca 18 km/s.[5] Stjärnan minskas på dess nuvarande avstånd i ljusstyrka genom skymning av interstellärt stoft med 0,38 magnitud[16] och den har en absolut magnitud på -0,76.[6]

Egenskaper

HD 168592 är en orange till gul jättestjärna av spektralklass K4/5 III,[3] som anger att den är en utvecklad stjärna med karaktär av spektraltyp K4 och K5. Den har en massa av ca 1,2[7] solmassa, en radie av ca 44[8] solradier och utsänder energi från dess fotosfär motsvarande ca 666[1] gånger solen vid en effektiv temperatur av ca 4 150[8] K. Den har en lätt metallbrist med en järnmängd på 26 procent under solens.[10] Stjärnan roterar långsamt, vilket är vanligt för jättestjärnor, med en projicerad rotationshastighet på 1,9 km/s.[11]

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, HD 168592, 27 juli 2023.

Noter

  1. ^ [a b c d e f g h] 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] Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume III: Declinations −40° to −26°. Bibcode:1982mcts.book.....H.
  4. ^ Corben, P. M.; Stoy, R. H. (1968). "Photoelectric Magnitudes and Colours for Bright Southern Stars". Monthly Notes of the Astronomical Society of South Africa. 27: 11. Bibcode:1968MNSSA..27...11C. ISSN 0024-8266.
  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. ^ [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.
  7. ^ [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.
  8. ^ [a b c] Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants". Astronomy & Astrophysics. 426 (1): 297–307. arXiv:astro-ph/0404180. Bibcode:2004A&A...426..297K. doi:10.1051/0004-6361:20035930. eISSN 1432-0746. ISSN 0004-6361.
  9. ^ 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.
  10. ^ [a b] Poggio, E.; Recio-Blanco, A.; Palicio, P. A.; Re Fiorentin, P.; de Laverny, P.; Drimmel, R.; Kordopatis, G.; Lattanzi, M. G.; Schultheis, M.; Spagna, A.; Spitoni, E. (30 September 2022). "The chemical signature of the Galactic spiral arms revealed by Gaia DR3". Astronomy & Astrophysics. 666: L4. arXiv:2206.14849. Bibcode:2022A&A...666L...4P. doi:10.1051/0004-6361/202244361. eISSN 1432-0746. ISSN 0004-6361.
  11. ^ [a b] De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. eISSN 1432-0746. ISSN 0004-6361.
  12. ^ 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.
  13. ^ https://simbad.cds.unistra.fr/simbad/sim-id?Ident=HR+6862. Hämtad 2024-10-29.
  14. ^ "HD 168592". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 22 december 2022.
  15. ^ 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.
  16. ^ 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.

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