HD 125288

HD 125288
HD 125288
Classe spettraleB5Ib/II[2] o B6Ib[3]
Distanza dal Sole1230±90 anni luce
CostellazioneCentauro
Coordinate
Ascensione retta14h 20m 19,54262s[1]
Declinazione−56° 23′ 11,3900″[1]
Dati fisici
Raggio medio18,87+1,35
−1,50
[4] R
Massa
7,9±0,4[5] M
Temperatura
superficiale
  • 7 081+299
    −242
    K[4] (media)
Luminosità
806,3±142,9[4] L
Età stimata37,3±4,2 miliardi di anni[5]
Dati osservativi
Magnitudine app.4,30[6]
Magnitudine ass.-3,56[6]
Parallasse2,66±0,20[1]
Velocità radiale4,2±2,7[6]
Nomenclature alternative
v Cen, CP −55°5984, FK5 529, HIP 70069 , HR 5358, SAO 241641, GC 19318[7]

HD 125288 è una stella nella costellazione australe del Centauro, nota anche come v Centauri, in base alla nomenclatura Bayer, mentre la nomenclatura con HD è riferita al catalogo Henry Draper. La stella ha una tonalità blu-bianca ed è debolmente visibile, avendo una magnitudine apparente di 4,30.[6] Sulla base delle misurazioni della parallasse, si trova a una distanza di circa 1.230 anni luce dal Sole[1] e potrebbe trattarsi di una stella in fuga che si sta muovendo verso ovest e sta ricadendo nel piano galattico. Ha una magnitudine assoluta di -3,56.

La stella è una supergigante di tipo B,[8] classificabile come B5Ib/II[2] o B6Ib,[3] con un'età di circa 37 milioni di anni, una massa pari a 8 volte la massa del Sole,[5] una circonferenza 19 volte quella del Sole e ruota su sé stessa con una velocità di rotazione di 23 km/sec. La sua luminosità è 806 volte quella del Sole,[5] con una temperatura efficace di 7.081 K.

Nel 2016, un asterismo che includeva HD 125288 (SAO 241641) è stato identificato ufficiosamente in onore di David Bowie.[9][10]

Note

  1. ^ a b c d (EN) F. van Leeuwen, Validation of the new Hipparcos reduction, in Astronomy & Astrophysics, vol. 474, n. 2, 1º novembre 2007, pp. 653–664, DOI:10.1051/0004-6361:20078357. URL consultato il 17 settembre 2023.
  2. ^ a b Nancy Houk, Michigan catalogue of two-dimensional spectral types for the HD stars, 1º gennaio 1978. URL consultato il 17 settembre 2023.
  3. ^ a b (EN) J. Maíz Apellániz, M. Pantaleoni González e R. H. Barbá, Search for Galactic runaway stars using Gaia Data Release 1 and HIPPARCOS proper motions, in Astronomy & Astrophysics, vol. 616, 1º agosto 2018, pp. A149, DOI:10.1051/0004-6361/201832787. URL consultato il 17 settembre 2023.
  4. ^ a b c (EN) A. G. A. Brown, A. Vallenari e T. Prusti, Gaia Data Release 2 - Summary of the contents and survey properties, in Astronomy & Astrophysics, vol. 616, 1º agosto 2018, pp. A1, DOI:10.1051/0004-6361/201833051. URL consultato il 17 settembre 2023.
  5. ^ a b c d (EN) N. Tetzlaff, R. Neuhäuser e M. M. Hohle, A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun: Catalogue of young runaway stars, in Monthly Notices of the Royal Astronomical Society, vol. 410, n. 1, 1º gennaio 2011, pp. 190–200, DOI:10.1111/j.1365-2966.2010.17434.x. URL consultato il 17 settembre 2023.
  6. ^ a b c d (EN) E. Anderson e Ch. Francis, XHIP: An extended hipparcos compilation, in Astronomy Letters, vol. 38, n. 5, 1º maggio 2012, pp. 331–346, DOI:10.1134/S1063773712050015. URL consultato il 17 settembre 2023.
  7. ^ HD 125288, su simbad.u-strasbg.fr. URL consultato il 17 settembre 2023.
  8. ^ (EN) M. Fraser, P. L. Dufton e I. Hunter, Atmospheric parameters and rotational velocities for a sample of Galactic B-type supergiants, in Monthly Notices of the Royal Astronomical Society, 2010-03, DOI:10.1111/j.1365-2966.2010.16392.x. URL consultato il 17 settembre 2023.
  9. ^ (EN) David Bowie Honored With Lightning Bolt-Shaped Constellation, su HuffPost, 18 gennaio 2016. URL consultato il 17 settembre 2023.
  10. ^ (EN) Guy, Constellation Bowie? I don't think so, su Universal Workshop, 18 gennaio 2016. URL consultato il 17 settembre 2023.
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