60 Herculis

60 Herculis
Observationsdata
Epok: J2000.0
StjärnbildHerkules
Rektascension17t 05m 22,69066s[1]
Deklination+12° 44′ 26,9816″[2]
Skenbar magnitud ()+4,87[3], +4,871 ± 0,009 (V)[2]
Stjärntyp
SpektraltypA3 V[4] eller A4 IV[5]
U–B0,12[6]
B–V0,125 ± 0,006[7]
Astrometri
Radialhastighet ()-4,2 ± 2[8] km/s
Egenrörelse (µ)RA: +49,805 ± 0,387[1] mas/år
Dek.: -12,030 ± 0,357[1] mas/år
Parallax ()24,3967 ± 0,2232[1]
Avstånd134 ± 1  (41,0 ± 0,4 pc)
Absolut magnitud ()1,83[9]
Detaljer
Massa1,93 ± 0,01[10] M
Radie1,90[11] R
Luminositet17,159[10] L
Temperatur8 299[10] K
Metallicitet0,05 ± 9,99 (Fe/H)[12] dex
Vinkelhastighet117[10] km/s
Ålder327[13] miljarder år
Andra beteckningar
HD 154494[14], HIP 83613[14], HR 6355[14], SAO 102584[14], 2MASS J17052271+1244268[14], GSC 00984-02436[14], ADS 10334 A[14], BD+12 3142[14], CCDM J17054+1245A[14], FK5 635[14], GC 23061[14], GCRV 9861[14], HIC 83613[14], IDS 17007+1253 A[14], IRAS 17030+1248[14], JP11 2818[14], N30 3811[14], PLX 3882[14], PLX 3882.00[14], PMC 90-93 453[14], PPM 132989[14], ROT 2412[14], SRS 30635[14], TD1 19934[14], TYC 984-2436-1[14], UBV 14418[14], uvby98 100154494[14], WDS J17054+1244A[14], YZ 12 5970[14], WEB 14142[14], Gaia DR2 4544196074866779904[14], 60 Her, TIC 263798437[14], Gaia DR3 4544196074866779904[14], AG+12 1768[14] och UBV M 21898[14] [15]

60 Herculis, som är stjärnans Flamsteed-beteckning, är en ensam stjärna[16] i den västra delen av stjärnbilden Herkules.[15] Den har en skenbar magnitud på ca 4,87[3] och är synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 24,4[1] mas, beräknas den befinna sig på ett avstånd på ca 134 ljusår (ca 41 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet på ca –4 km/s.[8]

Egenskaper

60 Herculis är en blå till vit stjärna i huvudserien av spektralklass A3V,[4] men tidigare studier gav emellertid den en luminositetsklass av IV,[5] vilket antydde att den skulle vara en underjättestjärna. Den har en massa som är ca 1,9[10] solmassor, en radie som är ca 1,9[10] solradier och utsänder ca 17[10] gånger mera energi än solen från dess fotosfär vid en effektiv temperatur på ca 8 300 K.[10]

60 Herculis har en hög projicerad rotationshastighet på 117 km/s,[10] vilket ger den en ekvatoriell radie som är 5 procent större än stjärnans polarradie.[17]

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, 60 Herculis, 16 januari 2020.

Noter

  1. ^ [a b c d e] 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.
  2. ^ [a b] ”Basic data: V* 60 Her – High proper-motion Star” (på engelska). Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=60+Her&submit=SIMBAD+search. Läst 5 september 2019. 
  3. ^ [a b] Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
  4. ^ [a b] Abt, Helmut A.; Morrell, Nidia I. (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.
  5. ^ [a b] Cowley, A.; et al. (April 1969). "A study of the bright A stars. I. A catalogue of spectral classifications". Astronomical Journal. 74: 375–406. Bibcode:1969AJ.....74..375C. doi:10.1086/110819.
  6. ^ Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
  7. ^ van Leeuwen (2007). ”Hipparcos, the New Reduction” (på engelska). http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&HIP=83613. Läst 5 september 2019. 
  8. ^ [a b] Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Washington. Bibcode:1953GCRV..C......0W.
  9. ^ 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.
  10. ^ [a b c d e f g h i] Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691.
  11. ^ Pasinetti Fracassini, L. E.; et al. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics". Astronomy & Astrophysics. 367: 521–24. arXiv:astro-ph/0012289. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451
  12. ^ ”60 Herculis” (på engelska). Universe Guide. https://www.universeguide.com/star/60herculis. Läst 5 september 2019. 
  13. ^ 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.
  14. ^ [a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai] SIMBAD Astronomical Database.[källa från Wikidata]
  15. ^ [a b] "60 Her". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 2019-06-14.
  16. ^ Eggleton, P. P.; Tokovinin, A. A. (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.
  17. ^ 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.

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