HD 124639

HD 124639
Observation data
Epoch J2000      Equinox J2000
Constellation Apus
Right ascension 14h 24m 22.07440s[1]
Declination −82° 50′ 53.70″[1]
Apparent magnitude (V) 6.42[2]
Characteristics
Spectral type B8Ve[3]
U−B color index -0.33[2]
B−V color index +0.02[2]
Astrometry
Radial velocity (Rv)+26.70±1.78[4] km/s
Proper motion (μ) RA: −21.98±0.28[1] mas/yr
Dec.: −10.85±0.24[1] mas/yr
Parallax (π)3.37 ± 0.29[1] mas
Distance970 ± 80 ly
(300 ± 30 pc)
Details
Mass4.4±0.3[3] M☉
Luminosity187[5] L☉
Surface gravity (log g)3.50±0.10[3] cgs
Temperature8,298[5] K
Rotational velocity (v sin i)204[6] km/s
Age126[3] Myr
Other designations
CD-82° 255, HD 124639, HIP 70418, HR 5327, SAO 258697.
Database references
SIMBADdata

HD 124639 is a Be star in the southern constellation of Apus.

References

  1. 1 2 3 4 5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. 1 2 3 Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J
  3. 1 2 3 4 Levenhagen, R. S.; Leister, N. V. (February 2004), "Physical Parameters of Southern B- and Be-Type Stars", The Astronomical Journal, 127 (2): 1176–1180, Bibcode:2004AJ....127.1176L, doi:10.1086/381063
  4. ↑ Kharchenko, N. V.; et al. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889–896. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776.
  5. 1 2 McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x
  6. ↑ Royer, F.; et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i", Astronomy and Astrophysics, 393 (3): 897–911, arXiv:astro-ph/0205255, Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943.
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