HD 23753

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HD 23753
Observation data
Epoch J2000      Equinox J2000
Constellation Taurus
Right ascension  03h 48m 20.81702s[1]
Declination +23° 25′ 16.5006″[1]
Apparent magnitude (V) 5.44[2]
Evolutionary stage main sequence[3]
Spectral type B9 Vn[4]
B−V color index −0.067±0.008[2]
Radial velocity (Rv)+7.6±0.5[5] km/s
Proper motion (μ) RA: +19.481[1] mas/yr
Dec.: −47.434[1] mas/yr
Parallax (π)7.7224 ± 0.1918[1] mas
Distance420 ± 10 ly
(129 ± 3 pc)
Absolute magnitude (MV)0.00[2]
Mass3.21±0.07[3] M
Radius3.2[6] R
[3] L
[3] K
Rotation0.6994 d[7]
Rotational velocity (v sin i)335[3] km/s
Age125[8] Myr
Other designations
NSV 1321, BD+22° 563, HD 23753, HIP 17776, HR 1172, SAO 76215[9]
Database references

HD 23753 is a single[10] star in the equatorial zodiac constellation of Taurus, and is a member of the Pleiades open cluster.[11] It is dimly visible to the naked eye with an apparent visual magnitude of 5.44.[2] The distance to this star, as determined from its annual parallax shift of 7.7 mas,[1] is about 420 light years. It is moving further from the Earth with a heliocentric radial velocity of +8 km/s.[5] The star is positioned near the ecliptic and so is subject to lunar occultations.[12]

This is a B-type main-sequence star with a stellar classification of B9 Vn,[4] where the 'n' indicates "nebulous" lines due to rapid rotation. It is 125[8] million years old with a projected rotational velocity of 335 km/s,[3] completing a full revolution about its axis every 16.79 hours.[7] HD 23753 has been catalogued as a suspected variable star with the designation NSV 1321,[13] although the amplitude is no more than 0.1 magnitude and it may even be suitable for a photometric standard.[14]

HD 23753 has 3.21[3] times the mass of the Sun and 3.2[6] times the Sun's radius. It is radiating 150[3] times the Sun's luminosity from its photosphere at an effective temperature of 11,535 K.[3]

See also[edit]


  1. ^ a b c d e f 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.
  2. ^ a b c d 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.
  3. ^ a b c d e f g h i Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691.
  4. ^ a b Cowley, A. (November 1972), "Spectral classification of the bright B8 stars", Astronomical Journal, 77: 750–755, Bibcode:1972AJ.....77..750C, doi:10.1086/111348.
  5. ^ a b de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, A61.
  6. ^ a b Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy & Astrophysics (3rd ed.), 367 (2): 521–24, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
  7. ^ a b Rebull, L. M.; et al. (November 2016), "Rotation in the Pleiades with K2. I. Data and First Results", The Astronomical Journal, 152 (5): 19, arXiv:1606.00052, Bibcode:2016AJ....152..113R, doi:10.3847/0004-6256/152/5/113, 113.
  8. ^ a b Su, K. Y. L.; et al. (December 2006), "Debris Disk Evolution around A Stars", The Astrophysical Journal, 653 (1): 675–689, arXiv:astro-ph/0608563, Bibcode:2006ApJ...653..675S, doi:10.1086/508649.
  9. ^ "HD 161840". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-08-06.
  10. ^ Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
  11. ^ White, Richard E.; et al. (February 2001), "Interstellar Matter Near the Pleiades. V. Observations of NA I toward 36 Stars", The Astrophysical Journal Supplement Series, 132 (2): 253–280, Bibcode:2001ApJS..132..253W, doi:10.1086/318950
  12. ^ Eitter, J. J.; Beavers, W. I. (August 1977), "Lunar occultation summary. II", Astrophysical Journal Supplement Series, 34: 493–504, Bibcode:1977ApJS...34..493E, doi:10.1086/190460
  13. ^ Samus', N. N.; et al. (2017), "General catalogue of variable stars: Version GCVS 5.1", Astronomy Reports, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085.
  14. ^ Adelman, S. J.; et al. (October 2000), "On the Variability of Late B III-V Stars", Information Bulletin on Variable Stars, 4968: 1, Bibcode:2000IBVS.4968....1A.