HD 143361

HD 143361 is a star in the southern constellation Norma. With an apparent visual magnitude of 9.20,[2] 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 roughly 224 light-years (69 parsecs).[1]

HD 143361
Observation data
Epoch J2000      Equinox J2000
Constellation Norma
Right ascension 16h 01m 50.3484s[1]
Declination −44° 26′ 04.341″[1]
Apparent magnitude (V) 9.20[2]
Characteristics
Spectral type G6 V[3]
Apparent magnitude (B) ~9.93[4]
Apparent magnitude (V) ~9.16[4]
Apparent magnitude (J) 7.905 ± 0.026[5]
Apparent magnitude (H) 7.572 ± 0.038[5]
Apparent magnitude (K) 7.488 ±0.018[5]
B−V color index 0.773[2]
Astrometry
Radial velocity (Rv)–1.5 ± 0.7[4] km/s
Proper motion (μ) RA: −156.658±0.089[1] mas/yr
Dec.: −120.428±0.058[1] mas/yr
Parallax (π)14.55 ± 0.27[1] mas
Distance224 ± 4 ly
(69 ± 1 pc)
Details
Mass0.93[6] M☉
Temperature5,420[7] K
Metallicity [Fe/H]0.06[2] dex
Age8.1[7] Gyr
Other designations
CD–44 10569, HD 143361, HIP 78521, SAO 226454.
Database references
SIMBADdata
Extrasolar Planets
Encyclopaedia		data

This is a G-type main sequence star with a stellar classification of G6 V.[3] It has around 95% of the Sun's mass and is around 8.1[7] billion years old.

Planetary system

In October 2008 the planet 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.[6]

The HD 143361 planetary system[8]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥3.48±0.24 MJ 1.98±0.07 1046.2±3.2 0.193±0.015 — —

See also
  • List of extrasolar planets

References
  1. Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. S2CID 1828208.Gaia Data Release 1 catalog entry
  2. Jenkins, J. S.; et al. (July 2008), "Metallicities and activities of southern stars", Astronomy and Astrophysics, 485 (2): 571–584, arXiv:0804.1128, Bibcode:2008A&A...485..571J, doi:10.1051/0004-6361:20078611, S2CID 8813298
  3. 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
  4. "NLTT 41735 -- High proper-motion Star", SIMBAD Astronomical Object Database, Centre de Données astronomiques de Strasbourg, retrieved 2009-06-10
  5. Cutri, R. M.; et al. (June 2003), 2MASS All Sky Catalog of point sources, NASA/IPAC, Bibcode:2003tmc..book.....C
  6. 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, arXiv:0810.5348, Bibcode:2009ApJ...693.1424M, doi:10.1088/0004-637X/693/2/1424, S2CID 119224845
  7. Nordström, B.; et al. (May 2004), "The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ˜14 000 F and G dwarfs", Astronomy and Astrophysics, 418: 989–1019, arXiv:astro-ph/0405198, Bibcode:2004A&A...418..989N, doi:10.1051/0004-6361:20035959, S2CID 11027621
  8. Jenkins, J. S.; et al. (2017). "New planetary systems from the Calan–Hertfordshire Extrasolar Planet Search". Monthly Notices of the Royal Astronomical Society. 466 (1): 443–473. arXiv:1603.09391. Bibcode:2017MNRAS.466..443J. doi:10.1093/mnras/stw2811. S2CID 18016219.


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