# HD 143699

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Star in the constellation of Lupus

HD 143699 Location of HD 143699 (circled in red) Observation data Epoch J2000 Equinox J2000 Constellation Lupus[1] Right ascension 16h 03m 24.18956s[2] Declination −38° 36′ 09.1424″[2] Apparent magnitude (V) 4.90[1] Characteristics Evolutionary stage main sequence[3] Spectral type B5/7 III/IV[4] B−V color index −0.146±0.043[1] Astrometry Radial velocity (Rv) −1.9±2.8[1] km/s Proper motion (μ) RA: −18.488[2] mas/yr Dec.: −28.147[2] mas/yr Parallax (π) 9.2268±0.4693 mas[2] Distance 350 ± 20 ly (108 ± 6 pc) Absolute magnitude (MV) −0.54[1] Details Mass 4.58[5] M☉ Radius 3.89[6] R☉ Luminosity 447[5] L☉ Surface gravity (log g) 3.82[6] cgs Temperature 15,480[6] K Rotation 0.894 days[5] Rotational velocity (v sin i) 115[5] km/s Age 60[6] Myr Other designations CD−38°10832, FK5 3267, HD 143699, HIP 78655, HR 5967, SAO 207276[7] Database references SIMBAD data

**HD 143699** is a single[8] [star](/source/Star) in the southern [constellation](/source/Constellation) of [Lupus](/source/Lupus_(constellation)). It is a dim star but visible to the naked eye with an [apparent visual magnitude](/source/Apparent_visual_magnitude) of 4.90.[1] Based upon an annual [parallax shift](/source/Stellar_parallax) of 9.2 [mas](/source/Milliarcsecond),[2] it is located around 350 [light years](/source/Light_year) away. It is most likely (90%[9] chance) a member of the Upper Centaurus–Lupus[10] subgroup of the [Sco OB2](/source/Sco_OB2) [moving group](/source/Moving_group).

This star has a [stellar classification](/source/Stellar_classification) of B5/7 III/IV,[4] suggesting it is an [evolving](/source/Stellar_evolution) star that is entering the [giant stage](/source/Giant_star). However, according to Zorec and Royer (2012) it is only 56% of the way through its [main sequence](/source/Main_sequence) lifespan.[3] It is a [chemically peculiar](/source/Chemically_peculiar_star) [magnetic](/source/Stellar_magnetic_field) B star,[11] showing an averaged quadratic [field strength](/source/Magnetic_field) of (167.2±140.4)×10−3 [T](/source/Tesla_(unit)).[12] Helium-weak, it displays an underabundance of helium in its [spectrum](/source/Stellar_spectrum).[13] [Radio](/source/Radio) emissions have been detected from this source.[11]

HD 143699 has 4.6 times the [mass of the Sun](/source/Mass_of_the_Sun)[5] and 3.9 times the [Sun's radius](/source/Sun's_radius).[6] It has a high rate of spin with a [projected rotational velocity](/source/Projected_rotational_velocity) of 115 km/s, resulting in a short rotation period of 0.894 days.[5] The star is radiating 447 times the [Sun's luminosity](/source/Sun's_luminosity)[5] from its [photosphere](/source/Photosphere) at an [effective temperature](/source/Effective_temperature) of 15,480 [K](/source/Kelvin).[6]

## References

1. ^ [***a***](#cite_ref-Anderson2012_1-0) [***b***](#cite_ref-Anderson2012_1-1) [***c***](#cite_ref-Anderson2012_1-2) [***d***](#cite_ref-Anderson2012_1-3) [***e***](#cite_ref-Anderson2012_1-4) [***f***](#cite_ref-Anderson2012_1-5) Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". *[Astronomy Letters](/source/Astronomy_Letters)*. **38** (5): 331. [arXiv](/source/ArXiv_(identifier)):[1108.4971](https://arxiv.org/abs/1108.4971). [Bibcode](/source/Bibcode_(identifier)):[2012AstL...38..331A](https://ui.adsabs.harvard.edu/abs/2012AstL...38..331A). [doi](/source/Doi_(identifier)):[10.1134/S1063773712050015](https://doi.org/10.1134%2FS1063773712050015). [XHIP record for this object](https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-ref=VIZ681510a8389ecb&-out.src=V%2F137D%2FXHIP&-nav=cat%3AV%2F137D%26tab%3A{V%2F137D%2FXHIP}%26key%3Asource%3DV%2F137D%2FXHIP%26HTTPPRM%3A&-source=V%2F137D%2FXHIP&-out=HIP&HIP=78655&-out=Comp&-out=Gr&-out=RAJ2000&-out=DEJ2000&-out=Dist&-out=X&-out=Y&-out=Z&-out=SpType&-out=Simbad&-out=Hpmag&-out=Lum&-out=Cst) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-GaiaDR2_2-0) [***b***](#cite_ref-GaiaDR2_2-1) [***c***](#cite_ref-GaiaDR2_2-2) [***d***](#cite_ref-GaiaDR2_2-3) [***e***](#cite_ref-GaiaDR2_2-4) [***f***](#cite_ref-GaiaDR2_2-5) [Brown, A. G. A.](/source/Anthony_Brown_(scientist)); et al. ([Gaia collaboration](/source/Data_Processing_and_Analysis_Consortium)) (August 2018). ["*Gaia* Data Release 2: Summary of the contents and survey properties"](https://doi.org/10.1051%2F0004-6361%2F201833051). *[Astronomy & Astrophysics](/source/Astronomy_%26_Astrophysics)*. **616**. A1. [arXiv](/source/ArXiv_(identifier)):[1804.09365](https://arxiv.org/abs/1804.09365). [Bibcode](/source/Bibcode_(identifier)):[2018A&A...616A...1G](https://ui.adsabs.harvard.edu/abs/2018A&A...616A...1G). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201833051](https://doi.org/10.1051%2F0004-6361%2F201833051).

1. ^ [***a***](#cite_ref-zorec2012_3-0) [***b***](#cite_ref-zorec2012_3-1) Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", *Astronomy & Astrophysics*, **537**: A120, [arXiv](/source/ArXiv_(identifier)):[1201.2052](https://arxiv.org/abs/1201.2052), [Bibcode](/source/Bibcode_(identifier)):[2012A&A...537A.120Z](https://ui.adsabs.harvard.edu/abs/2012A&A...537A.120Z), [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201117691](https://doi.org/10.1051%2F0004-6361%2F201117691), [S2CID](/source/S2CID_(identifier)) [55586789](https://api.semanticscholar.org/CorpusID:55586789).

1. ^ [***a***](#cite_ref-houk1979_4-0) [***b***](#cite_ref-houk1979_4-1) 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](/source/Bibcode_(identifier)):[1982mcts.book.....H](https://ui.adsabs.harvard.edu/abs/1982mcts.book.....H).

1. ^ [***a***](#cite_ref-shultz2022_5-0) [***b***](#cite_ref-shultz2022_5-1) [***c***](#cite_ref-shultz2022_5-2) [***d***](#cite_ref-shultz2022_5-3) [***e***](#cite_ref-shultz2022_5-4) [***f***](#cite_ref-shultz2022_5-5) [***g***](#cite_ref-shultz2022_5-6) Shultz, M. E.; Owocki, S. P.; Ud-Doula, A.; Biswas, A.; Bohlender, D.; Chandra, P.; Das, B.; David-Uraz, A.; Khalack, V.; Kochukhov, O.; Landstreet, J. D.; Leto, P.; Monin, D.; Neiner, C.; Rivinius, Th; Wade, G. A. (2022). ["MOBSTER - VI. The crucial influence of rotation on the radio magnetospheres of hot stars"](https://doi.org/10.1093%2Fmnras%2Fstac136). *Monthly Notices of the Royal Astronomical Society*. **513** (1): 1429. [arXiv](/source/ArXiv_(identifier)):[2201.05512](https://arxiv.org/abs/2201.05512). [Bibcode](/source/Bibcode_(identifier)):[2022MNRAS.513.1429S](https://ui.adsabs.harvard.edu/abs/2022MNRAS.513.1429S). [doi](/source/Doi_(identifier)):[10.1093/mnras/stac136](https://doi.org/10.1093%2Fmnras%2Fstac136).

1. ^ [***a***](#cite_ref-glagolevskij2019_6-0) [***b***](#cite_ref-glagolevskij2019_6-1) [***c***](#cite_ref-glagolevskij2019_6-2) [***d***](#cite_ref-glagolevskij2019_6-3) [***e***](#cite_ref-glagolevskij2019_6-4) [***f***](#cite_ref-glagolevskij2019_6-5) Glagolevskij, Yu. V. (2019). "On Properties of Main Sequence Magnetic Stars". *Astrophysical Bulletin*. **74** (1): 66. [Bibcode](/source/Bibcode_(identifier)):[2019AstBu..74...66G](https://ui.adsabs.harvard.edu/abs/2019AstBu..74...66G). [doi](/source/Doi_(identifier)):[10.1134/S1990341319010073](https://doi.org/10.1134%2FS1990341319010073).

1. **[^](#cite_ref-SIMBAD_7-0)** ["HD 143699"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+143699). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 2018-07-29.

1. **[^](#cite_ref-Eggleton2008_8-0)** 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](/source/ArXiv_(identifier)):[0806.2878](https://arxiv.org/abs/0806.2878), [Bibcode](/source/Bibcode_(identifier)):[2008MNRAS.389..869E](https://ui.adsabs.harvard.edu/abs/2008MNRAS.389..869E), [doi](/source/Doi_(identifier)):[10.1111/j.1365-2966.2008.13596.x](https://doi.org/10.1111%2Fj.1365-2966.2008.13596.x), [S2CID](/source/S2CID_(identifier)) [14878976](https://api.semanticscholar.org/CorpusID:14878976).

1. **[^](#cite_ref-Rizzuto2011_9-0)** 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](/source/ArXiv_(identifier)):[1106.2857](https://arxiv.org/abs/1106.2857), [Bibcode](/source/Bibcode_(identifier)):[2011MNRAS.416.3108R](https://ui.adsabs.harvard.edu/abs/2011MNRAS.416.3108R), [doi](/source/Doi_(identifier)):[10.1111/j.1365-2966.2011.19256.x](https://doi.org/10.1111%2Fj.1365-2966.2011.19256.x), [S2CID](/source/S2CID_(identifier)) [54510608](https://api.semanticscholar.org/CorpusID:54510608).

1. **[^](#cite_ref-Bobylev2007_10-0)** Bobylev, V. V.; Bajkova, A. T. (September 2007), "Kinematics of the Scorpius–Centaurus OB association", *Astronomy Letters*, **33** (9): 571–583, [arXiv](/source/ArXiv_(identifier)):[0708.0943](https://arxiv.org/abs/0708.0943), [Bibcode](/source/Bibcode_(identifier)):[2007AstL...33..571B](https://ui.adsabs.harvard.edu/abs/2007AstL...33..571B), [doi](/source/Doi_(identifier)):[10.1134/S1063773707090010](https://doi.org/10.1134%2FS1063773707090010), [S2CID](/source/S2CID_(identifier)) [15785349](https://api.semanticscholar.org/CorpusID:15785349).

1. ^ [***a***](#cite_ref-Linsky1992_11-0) [***b***](#cite_ref-Linsky1992_11-1) Linsky, Jeffrey L.; et al. (July 1992), "Radio Emission from Chemically Peculiar Stars", *Astrophysical Journal*, **393**: 341, [Bibcode](/source/Bibcode_(identifier)):[1992ApJ...393..341L](https://ui.adsabs.harvard.edu/abs/1992ApJ...393..341L), [doi](/source/Doi_(identifier)):[10.1086/171509](https://doi.org/10.1086%2F171509).

1. **[^](#cite_ref-bychkov2009_12-0)** 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](/source/Bibcode_(identifier)):[2009MNRAS.394.1338B](https://ui.adsabs.harvard.edu/abs/2009MNRAS.394.1338B), [doi](/source/Doi_(identifier)):[10.1111/j.1365-2966.2008.14227.x](https://doi.org/10.1111%2Fj.1365-2966.2008.14227.x), [S2CID](/source/S2CID_(identifier)) [120268049](https://api.semanticscholar.org/CorpusID:120268049).

1. **[^](#cite_ref-Kilambi1992_13-0)** 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](/source/Bibcode_(identifier)):[1992JApA...13..175K](https://ui.adsabs.harvard.edu/abs/1992JApA...13..175K), [doi](/source/Doi_(identifier)):[10.1007/BF02702309](https://doi.org/10.1007%2FBF02702309), [S2CID](/source/S2CID_(identifier)) [119896529](https://api.semanticscholar.org/CorpusID:119896529)

v t e Constellation of Lupus List of stars in Lupus Lupus in Chinese astronomy Stars Bayer α (Uridim) β γ δ ε ζ η θ ι κ λ μ ν1 ν2 ξ ο π ρ σ τ1 τ2 υ φ1 φ2 χ ψ1 ψ2 ω Flamsteed 1 (i) 2 (f) Variable RU EX GG GQ HR II IL IM KT (d) V407 V462 HR 5362 5364 5401 5651 (e) 5724 (k) 5825 (g) 5943 5967 HD 134004 135344 136164 141943 142527 143811 Other Gliese 588 HIP 70849 Lupus-TR-3 SSSPM J1549−3544 WASP-132 Exoplanets GQ Lupi b HIP 70849 b Lupus-TR-3b WASP-178b Star clusters NGC 5749 NGC 5822 NGC 5824 NGC 5927 NGC 5986 Nebulae IC 4406 NGC 5882 Galaxies IC 4444 NGC 5530 NGC 5643 Astronomical events SN 1006 Category

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Adapted from the Wikipedia article [HD 143699](https://en.wikipedia.org/wiki/HD_143699) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/HD_143699?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.