HD 46815

HD 46815
Observationsdata
Epok: J2000.0
StjärnbildDuvan
Rektascension06t 33m 49,4800s[1]
Deklination-36° 13′ 55,2951″[1]
Skenbar magnitud ()+5,40 ± 0,01[2]
Stjärntyp
SpektraltypK3 III[3]
U–B+1,72[4]
B–V+1,42[4]
Astrometri
Radialhastighet ()+32,2 ± 2,8[5] km/s
Egenrörelse (µ)RA: -15,622[1] mas/år
Dek.: +99,481[1] mas/år
Parallax ()7,9846 ± 0,0528[1]
Avstånd408 ± 3  (125,2 ± 0,8 pc)
Absolut magnitud ()+0,03[6]
Detaljer
Massa1,17[7] M
Radie24,15[8] R
Luminositet180 ± 2[9] L
Temperatur4 297 ± 122[8] K
Metallicitet+0,08 ± 0,02 (Fe/H)[10] dex
Vinkelhastighet2,3 ± 1,2[11] km/s
Andra beteckningar
106 G. Columbae,[12] CD-36 2990, CPD-36 994, GSC 07086-01164, HIC 31299, HIP 31299, HR 2411, IRAS 06320-3611, 2MASS J06334949-3613552, PLX 1536, PPM 282830, SAO 196945, TYC 7086-1164-1, Gaia DR2 5580491384682907264 [13][14]

HD 46815, eller HR 2411, är en ensam stjärna[15] i den mellersta delen av stjärnbilden Duvan. Den har en skenbar magnitud av ca 5,40[2] och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 3 på ca 8,0 mas,[1] beräknas den befinna sig på ett avstånd på ca 408 ljusår (ca 125 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 32 km/s.[5]

Egenskaper

HD 46815 är en röd till orange jättestjärna av spektralklass K3 III,[3] som befinner sig på den röda jättegrenen. Den har en massa som är ca 1,2[7] solmassor, en radie som är ca 24[10] solradier och har ca 180 gånger solens utstrålning av energi[9] från dess fotosfär vid en effektiv temperatur av ca 4 300 K.[8] För att vara en jättestjärna har den en låg projicerad rotationshastighet av 2,3 km/s. [11]

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, HD 36848, 23 juni 2022.

Noter

  1. ^ [a b c d e f] Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 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_3. Declinations -40_ƒ0 to -26_ƒ0. Bibcode:1982mcts.book.....H.
  4. ^ [a b] Mermilliod, J. -C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV data. Bibcode:1986EgUBV........0M.
  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. 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. ISSN 1063-7737.
  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. ISSN 0004-6361.
  8. ^ [a b c] 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. ISSN 0004-6256.
  9. ^ [a b] Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  10. ^ [a b] Eggen, Olin J. (April 1989). "Large and kinematically unbiased samples of G- and K-type stars. IV - Evolved stars of the old disk population". Publications of the Astronomical Society of the Pacific. 101: 366. Bibcode:1989PASP..101..366E. doi:10.1086/132442. eISSN 1538-3873. ISSN 0004-6280.
  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: V. Southern stars⋆⋆⋆". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. 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. ^ HR 2411 (unistra.fr). Hämtad 2022-08-17.
  14. ^ "HR 2411". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 15 juni 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.

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