Astronomy:HD 143361

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Short description: Star in the constellation Norma
HD 143361
Observation data
Equinox J2000.0]] (ICRS)
Constellation Norma[1]
Right ascension  16h 01m 50.34828s[2]
Declination −44° 26′ 04.3434″[2]
Apparent magnitude (V) 9.20[3]
Characteristics
Evolutionary stage main sequence[2]
Spectral type G6 V[4]
Apparent magnitude (B) ~9.93[5]
Apparent magnitude (V) ~9.16[5]
Apparent magnitude (J) 7.905±0.026}[6]
Apparent magnitude (H) 7.572±0.038[6]
Apparent magnitude (K) 7.488±0.018[6]
B−V color index 0.773[3]
Astrometry
Radial velocity (Rv)−0.56±0.16[2] km/s
Proper motion (μ) RA: −156.561[2] mas/yr
Dec.: −120.231[2] mas/yr
Parallax (π)14.5456 ± 0.0202[2] mas
Distance224.2 ± 0.3 ly
(68.75 ± 0.10 pc)
Details
Mass1.01[7] M☉
Radius1.02[7] R☉
Luminosity0.85[8] L☉
Surface gravity (log g)4.36[7] cgs
Temperature5,503[7] K
Metallicity [Fe/H]+0.18[9] dex
Rotation41 days[10]
Rotational velocity (v sin i)1.7[9] km/s
Age5.8[7] Gyr
Other designations
CD–44°10569, HD 143361, HIP 78521, SAO 226454
Database references
SIMBADdata
Extrasolar Planets
Encyclopaedia		data

HD 143361 is a star in the southern constellation Norma. With an apparent visual magnitude of 9.20,[3] this star is too dim to be seen with the naked eye. It is close enough to the Earth that its distance can be determined using parallax measurements, yielding a value of 224 light-years (69 parsecs).[2]

This is a G-type main sequence star with a stellar classification of G6 V.[4] It has around 101% of the Sun's mass and is around 5.8 billion years old.[7]

HD 143361 is part of a binary star system. A red dwarf star has a similar distance and similar proper motions with the primary. Its orbit is very wide, as the angular separation of 33 arcminutes translates to a projected separation of 135,000 astronomical unit|AU (2.13 light-years).[11]

Planetary system

In October 2008 the exoplanet HD 143361 b was reported to be orbiting this star. This object was detected using the radial velocity method during an astronomical survey conducted by the Magellan Planet Search Program using the MIKE echelle spectrograph on the 6.5-m Magellan II (Clay) telescope.[12] In 2023, the inclination and true mass of HD 143361 b were determined via astrometry.[13]

The HD 143361 planetary system[13]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(years) 		Eccentricity Inclination Radius
b 4.35+1.2
−0.66 MJ 		1.994±0.018 2.8538+0.0031
−0.003 		0.1938+0.0047
−0.0046 		55+22
−15 or 125+15
−22° 		—

See also

  • List of extrasolar planets

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R  Constellation record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ 3.0 3.1 3.2 Jenkins, J. S. et al. (July 2008), "Metallicities and activities of southern stars", Astronomy and Astrophysics 485 (2): 571–584, doi:10.1051/0004-6361:20078611, Bibcode: 2008A&A...485..571J 
  4. ↑ 4.0 4.1 Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1978mcts.book.....H 
  5. ↑ 5.0 5.1 "NLTT 41735 -- High proper-motion Star", SIMBAD Astronomical Object Database (Centre de Données astronomiques de Strasbourg), http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HD+143361, retrieved 2009-06-10 
  6. ↑ 6.0 6.1 6.2 Cutri, R. M. et al. (June 2003), 2MASS All Sky Catalog of point sources, NASA/IPAC, Bibcode: 2003tmc..book.....C 
  7. ↑ 7.0 7.1 7.2 7.3 7.4 7.5 Tejada Arevalo, Roberto A.; Winn, Joshua N.; Anderson, Kassandra R. (2021). "Further Evidence for Tidal Spin-up of Hot Jupiter Host Stars". The Astrophysical Journal 919 (2): 138. doi:10.3847/1538-4357/ac1429. Bibcode: 2021ApJ...919..138T. 
  8. ↑ De Laverny, Patrick; Ligi, Roxanne; Crida, Aurélien; Recio-Blanco, Alejandra; Palicio, Pedro A. (2025). "The Gaia spectroscopic catalogue of exoplanets and host stars". Astronomy and Astrophysics 699: A100. doi:10.1051/0004-6361/202554739. Bibcode: 2025A&A...699A.100D. 
  9. ↑ 9.0 9.1 Pavlenko, Y. V.; Kaminsky, B. M.; Jenkins, J. S.; Ivanyuk, O. M.; Jones, H. R. A.; Lyubchik, Y. P. (2019). "Masses, oxygen, and carbon abundances in CHEPS dwarf stars". Astronomy and Astrophysics 621: A112. doi:10.1051/0004-6361/201834138. Bibcode: 2019A&A...621A.112P. 
  10. ↑ Arriagada, Pamela (2011). "Chromospheric Activity of Southern Stars from the Magellan Planet Search Program". The Astrophysical Journal 734 (1): 70. doi:10.1088/0004-637X/734/1/70. Bibcode: 2011ApJ...734...70A. 
  11. ↑ González-Payo, J.; Caballero, J. A.; Gorgas, J.; Cortés-Contreras, M.; Gálvez-Ortiz, M.-C.; Cifuentes, C. (2024-07-29). "Multiplicity of stars with planets in the solar neighbourhood". Astronomy & Astrophysics 689: A302. doi:10.1051/0004-6361/202450048. Bibcode: 2024A&A...689A.302G. 
  12. ↑ Minniti, Dante et al. (2009), "Low-Mass Companions for Five Solar-Type Stars From the Magellan Planet Search Program", The Astrophysical Journal 693 (2): 1424–1430, doi:10.1088/0004-637X/693/2/1424, Bibcode: 2009ApJ...693.1424M 
  13. ↑ 13.0 13.1 Xiao, Guang-Yao et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics 23 (5): 055022. doi:10.1088/1674-4527/accb7e. Bibcode: 2023RAA....23e5022X. 

Coordinates: Sky map 16h 01m 50.348s, −44° 26′ 04.33″



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