HD 143699

Short description: Star in the constellation of Lupus

HD 143699  Observation data
Equinox J2000.0]] (ICRS)

Constellation | Lupus
Right ascension |  16h 03m 24.18956s[1]
Declination | −38° 36′ 09.1424″[1]
Apparent magnitude (V) | 4.90[2]
Characteristics
Spectral type | B5/7 III/IV[3]
B−V color index | −0.146±0.043[2]
Astrometry
Radial velocity (Rv)| −1.9±2.8[2] km/s
Proper motion (μ)|  RA: −18.488[1] mas/yr
Dec.: −28.147[1] mas/yr
Parallax (π)| 9.2268 ± 0.4693[1] mas
Distance| 350 ± 20 ly
(108 ± 6 pc)
Absolute magnitude (MV)| −0.54[2]
Details
Mass| 4.31±0.07[4] M☉
Radius| 4.4[5] R☉
Luminosity| 438+39
−36[4] L☉
Temperature| 14521+202
−401[4] K
Rotational velocity (v sin i)| 123[4] km/s
Other designations

CD−38°10832, FK5 3267, HD 143699, HIP 78655, HR 5967, SAO 207276[6]

Database references
SIMBAD| data

HD 143699 is a single[7] 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.[2] Based upon an annual parallax shift of 9.2 mas,[1] it is located around 350 light years away. It is most likely (90%[8] chance) a member of the Upper Centaurus–Lupus[9] subgroup of the Sco OB2 moving group.

This star has a stellar classification of B5/7 III/IV,[3] 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.[4] It is a chemically peculiar magnetic B star,[10] showing an averaged quadratic field strength of (167.2±140.4)×10−3 T.[11] Helium-weak, it displays an underabundance of helium in its spectrum.[12] Radio emissions have been detected from this source.[10]

HD 143699 has 4.3[4] times the mass of the Sun and 4.4[5] times the Sun's radius. It has a high rate of spin with a projected rotational velocity of 123 km/s.[4] The star is radiating 438[4] times the Sun's luminosity from its photosphere at an effective temperature of 14,521 K.[4]

## References

1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.
2. ↑ 2.0 2.1 2.2 2.3 2.4 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
3. ↑ 3.0 3.1 Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 3, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode: 1982mcts.book.....H.
4. ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z.
5. ↑ 5.0 5.1 Pasinetti Fracassini, L. E. et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics 367 (2): 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
6. ↑ "HD 143699". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+143699.
7. ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
8. ↑ 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, doi:10.1111/j.1365-2966.2011.19256.x, Bibcode: 2011MNRAS.416.3108R.
9. ↑ Bobylev, V. V.; Bajkova, A. T. (September 2007), "Kinematics of the Scorpius–Centaurus OB association", Astronomy Letters 33 (9): 571–583, doi:10.1134/S1063773707090010, Bibcode: 2007AstL...33..571B.
10. ↑ 10.0 10.1 Linsky, Jeffrey L. et al. (July 1992), "Radio Emission from Chemically Peculiar Stars", Astrophysical Journal 393: 341, doi:10.1086/171509, Bibcode: 1992ApJ...393..341L.
11. ↑ 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, doi:10.1111/j.1365-2966.2008.14227.x, Bibcode: 2009MNRAS.394.1338B.
12. ↑ Kilambi, Gopal C. et al. (June 1992), "Mid-ultraviolet and optical photometry of helium stars", Journal of Astrophysics and Astronomy 13 (2): 175–194, doi:10.1007/BF02702309, Bibcode: 1992JApA...13..175K

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Stars of Lupus

Bayer|

* α
* β
* γ
* δ
* ε
* ζ
* η
* θ
* ι
* κ1
* κ2
* λ
* μ
* ν1
* ν2
* ξ1
* ξ2
* ο
* π
* ρ
* σ
* τ1
* τ2
* υ
* φ1
* φ2
* χ
* ψ1
* ψ2
* ω

Flamsteed|

* 1 (i)
* 2 (f)

Variable|

* RU
* RY
* BR
* EX
* FT
* FW
* GG
* GM
* GQ
* HR
* HX
* HZ
* II
* IM
* KT (d)
* NY
* NZ

HR|

* 5362
* 5364
* 5377
* 5380
* 5401
* 5412
* 5413
* 5426
* 5427
* 5444
* 5450 (a)
* 5457
* 5458
* 5494
* 5495 (b)
* 5498
* 5509
* 5556 (c)
* 5559
* 5566
* 5580
* 5595
* 5607
* 5615
* 5617
* 5625
* 5636
* 5637
* 5642
* 5650
* 5651 (e)
* 5653
* 5663
* 5667
* 5668
* 5682
* 5688
* 5689
* 5696
* 5724 (k)
* 5736
* 5738
* 5742
* 5751
* 5753
* 5767
* 5773
* 5784
* 5790
* 5807
* 5821
* 5822
* 5825 (g)
* 5837 (h)
* 5846
* 5860
* 5862
* 5864
* 5893
* 5916
* 5918
* 5923
* 5929
* 5935
* 5943
* 5952
* 5956
* 5967
* 5970
* 5974
* 5975
* 5991

HD|

* 125809
* 126093
* 126525
* 126759
* 128154
* 129624
* 133399
* 133469
* 133518
* 135430
* 135468
* 136607
* 137785
* 137919
* 138395
* 142527

Gliese|

* Gliese 588

Other|

* He 2-113
* HIP 70849
* Lupus-TR-3
* SAO 206462
* SSSPM J1549-3544
* 4U 1543-47

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