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] |
| Variable type | Emission-line |
| 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 |
| Distance | 970 ± 80 ly (300 ± 30 pc) |
| Details | |
| Mass | 4.4±0.3[3] M☉ |
| Luminosity | 187[5] L☉ |
| Surface gravity (log g) | 3.50±0.10[3] cgs |
| Temperature | 8,298[5] K |
| Rotational velocity (v sin i) | 204[6] km/s |
| Age | 126[3] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 124639 is a Be star in the southern constellation of Apus.
References
- 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.
- 1 2 3 Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory 4 (99), Bibcode:1966CoLPL...4...99J
- 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
- ↑ 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. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776.
- 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
- ↑ 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: 897–911, arXiv:astro-ph/0205255, Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943.
External links
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