HD 150248

HD 150248
Observationsdata
Epok: J2000.0
StjärnbildSkorpionen
Rektascension16t 41m 49,80149s[1]
Deklination-45° 22′ 07,4106″[1]
Skenbar magnitud ()+7,02 (V)[2]
Stjärntyp
SpektraltypG3 V + ?[3]
U–B+0,17[2]
B–V+0,68[2]
Astrometri
Radialhastighet ()+65,74 ± 0,13[4] km/s
Egenrörelse (µ)RA: +61,288 ± 0,086=SIMBAD/> mas/år
Dek.: -93,660 ± 0,058=SIMBAD/> mas/år
Parallax ()37,54 ± 0,50[1]
Avstånd87 ± 1  (26,6 ± 0,4 pc)
Detaljer
Massa1,02 M
Temperatur5 715 ± 5[5] K
Metallicitet-0,086 ± 0,004 (Fe/H)[5] dex
Vinkelhastighet1,43 ± 0,12[5] km/s
Ålder7,53 ± 0,58[5] miljarder år
Andra beteckningar
CD-45 10847, CPD-45 8085GSC, 08326-03248, HIC 81746, HIP 817462, MASS J16414979-4522075, PPM 322046, SAO 227066, SSTGLMC G339.3159+00.6042, TYC 8326-3248-1, uvby98 100150248, WISEA J164149.87-452208.0, Gaia DR2 5943191236735787520, Gaia DR1 5943191232411634048 [4]

HD 150248 är en ensam stjärna belägen i den södra delen av stjärnbilden Skorpionen. Den har en skenbar magnitud av ca 7,02[2] och kräver åtminstone en handkikare för att kunna observeras. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 37,5[1] mas, beräknas den befinna sig på ett avstånd på ca 87 ljusår (ca 27 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 66 km/s.[4]

Egenskaper

HD 150248 är en solliknande gul till vit stjärna i huvudserien av spektralklass G3 V.[3] Den har en massa som är ungefär lika med en[6] solmassa och en effektiv temperatur av ca 5 700 K.[5]

HD 150248 är en nära soltvilling.[5] Dess fotometriska färg är också mycket nära solens men har ett lägre överskott av metaller. En exakt soltvilling skulle vara en G2 V-stjärna med en temperatur på 5 778 K, vara 4,6 miljarder år gammal, med solmetallicitet och en avvikelse från solens ljusstyrka på 0,1 procent.[7] Stjärnor med en ålder av 4,6 miljarder år, som vår sol, är i det mest stabila tillståndet. Korrekt metallicitet och storlek är också mycket viktigt för variationer i låg ljusstyrka.[8][6][9]

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, HD 150248, 8 januari 2021.

Noter

  1. ^ [a b c d] Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  2. ^ [a b c d] Przybylski, A.; Kennedy, P. M. (1965). "Radial velocities and three-colour photometry of 166 southern stars". Monthly Notices of the Royal Astronomical Society. 131: 95. Bibcode:1965MNRAS.131...95P. doi:10.1093/mnras/131.1.95.
  3. ^ [a b] Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample". The Astronomical Journal. 132: 161. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637.
  4. ^ [a b c] http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HD+150248 |Hämtad 2021-01-08.
  5. ^ [a b c d e f] dos Santos, Leonardo A.; et al. (August 2016), "The Solar Twin Planet Search. IV. The Sun as a typical rotator and evidence for a new rotational braking law for Sun-like stars", Astronomy & Astrophysics, 592: 8, arXiv:1606.06214, Bibcode:2016A&A...592A.156D, doi:10.1051/0004-6361/201628558, A156.
  6. ^ [a b] National Center for Atmospheric Research, The Effects of Solar Variability on Earth's Climate, 2012 Report
  7. ^ NASA, Science News, Solar Variability and Terrestrial Climate, 8 januari 2013
  8. ^ University of Nebraska-Lincoln astronomy education group, Stellar Luminosity Calculator
  9. ^ Most of Earth’s twins aren’t identical, by Ethan on June 5, 2013

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