Observation data Epoch J2000 Equinox J2000 | |
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Constellation | Lupus |
Right ascension | 16 03 24.18956 |
Declination | −38° 36′ 09.1424″ |
Apparent magnitude (V) | 4.90 |
Characteristics | |
Spectral type | B5/7 III/IV |
B−V color index | −0.146±0.043 |
Astrometry | |
Radial velocity (Rv) | −1.9±2.8 km/s |
Proper motion (μ) | RA: −18.488 mas/yr Dec.: −28.147 mas/yr |
Parallax (π) | 9.2268 ± 0.4693 mas |
Distance | 350 ± 20 ly (108 ± 6 pc) |
Absolute magnitude (MV) | −0.54 |
Details | |
Mass | 4.31±0.07 M☉ |
Radius | 4.4 R☉ |
Luminosity | 438+39 −36 L☉ |
Temperature | 14521+202 −401 K |
Rotational velocity (v sin i) | 123 km/s |
Other designations | |
CD−38°10832, FK5 3267, HD 143699, HIP 78655, HR 5967, SAO 207276 | |
Database references | |
SIMBAD | data |
HD 143699 is a single star in the southern constellation of Lupus. It is a dim star but visible to the naked eye with an apparent visual magnitude of 4.90. Based upon an annual parallax shift of 9.2 mas, it is located around 350 light years away. It is most likely (90% chance) a member of the Upper Centaurus–Lupus subgroup of the Sco OB2 moving group.
This star has a stellar classification of B5/7 III/IV, suggesting it is an evolving star that is entering the giant stage. However, according to Zorec and Royer (2012) it is only 56% of the way through its main sequence lifespan. It is a chemically peculiar magnetic B star, showing an averaged quadratic field strength of (167.2±140.4)×10 T. Helium-weak, it displays an underabundance of helium in its spectrum. Radio emissions have been detected from this source.
HD 143699 has 4.3 times the mass of the Sun and 4.4 times the Sun's radius. It has a high rate of spin with a projected rotational velocity of 123 km/s. The star is radiating 438 times the Sun's luminosity from its photosphere at an effective temperature of 14,521 K.
References
- ^ 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.
- ^ 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, S2CID 119257644.
- ^ Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 3, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1982mcts.book.....H.
- ^ Zorec, J.; Royer, F. (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, S2CID 55586789.
- ^ Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (2) (Third ed.): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
- "HD 143699". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-29.
- 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, S2CID 14878976.
- Rizzuto, Aaron; et al. (October 2011), "Multidimensional Bayesian membership analysis of the Sco OB2 moving group", Monthly Notices of the Royal Astronomical Society, 416 (4): 3108–17, arXiv:1106.2857, Bibcode:2011MNRAS.416.3108R, doi:10.1111/j.1365-2966.2011.19256.x, S2CID 54510608.
- Bobylev, V. V.; Bajkova, A. T. (September 2007), "Kinematics of the Scorpius–Centaurus OB association", Astronomy Letters, 33 (9): 571–583, arXiv:0708.0943, Bibcode:2007AstL...33..571B, doi:10.1134/S1063773707090010, S2CID 15785349.
- ^ Linsky, Jeffrey L.; et al. (July 1992), "Radio Emission from Chemically Peculiar Stars", Astrophysical Journal, 393: 341, Bibcode:1992ApJ...393..341L, doi:10.1086/171509.
- Bychkov, V. D.; et al. (2009), "Catalogue of averaged stellar effective magnetic fields - II. Re-discussion of chemically peculiar A and B stars", Monthly Notices of the Royal Astronomical Society, 394 (3): 1338, Bibcode:2009MNRAS.394.1338B, doi:10.1111/j.1365-2966.2008.14227.x, S2CID 120268049.
- Kilambi, Gopal C.; et al. (June 1992), "Mid-ultraviolet and optical photometry of helium stars", Journal of Astrophysics and Astronomy, 13 (2): 175–194, Bibcode:1992JApA...13..175K, doi:10.1007/BF02702309, S2CID 119896529
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