HD 101930

HD 101930, also known as Gliese 3683, is an orange hued star located in the southern constellation Centaurus. It has an apparent magnitude of 8.21,[2] making it faintly visible in binoculars but not to the naked eye. The system is located relatively close at a distance of 98 light years[1] but is receding with a heliocentric radial velocity of 18.4 km/s.[5] A 2007 multicity survey found a co-moving companion located 73″ away,[13] making it a binary star. It has a class of M0-1[14] and a mass of 0.7 M☉.[13]

HD 101930
Observation data
Epoch J2000      Equinox J2000
Constellation Centaurus
Right ascension 11h 43m 30.11338s[1]
Declination –58° 00′ 24.7787″[1]
Apparent magnitude (V) 8.21[2]
Characteristics
Spectral type K2 V+[3]
B−V color index +0.91[4]
Astrometry
Radial velocity (Rv)+18.36[5] km/s
Proper motion (μ) RA: +16.680 mas/yr[1]
Dec.: +349.125 mas/yr[1]
Parallax (π)33.3814 ± 0.0180 mas[1]
Distance97.71 ± 0.05 ly
(29.96 ± 0.02 pc)
Absolute magnitude (MV)+5.88[2]
Details
Mass0.82[6] M☉
Radius0.87+0.05
−0.04[7] R☉
Luminosity0.43±0.01[8] L☉
Surface gravity (log g)4.40±0.11[9] cgs
Temperature5,079±62[5] K
Metallicity [Fe/H]+0.1±0.03[10] dex
Rotational velocity (v sin i)2[11] km/s
Age5.4±4.4[8] Gyr
Other designations
CD-57°4096, GJ 3683, HIP 57172, LTT 4350, NLTT 28356, SAO 239322[12]
Database references
SIMBADdata
ARICNSdata
Extrasolar Planets
Encyclopaedia		data

Characteristics

HD 101930 has a stellar classification of K2 V+,[3] indicating that it is an ordinary K-type main-sequence star. It has a current mass of 0.82 M☉[6] and is said to be 5.4 billion years old,[8] which is slightly older than the Sun. The object has 87% the radius of the Sun[7] and an effective temperature of 5,079 K.[5] When combined, these parameters yield a luminosity 43% that of the Sun from its photosphere.[8] As expected with planetary hosts, HD 101930 is metal enriched, having a metallicity 26% above solar levels.[10] The star's projected rotational velocity is similar to the Sun's, having a value of 2 km/s.[11]

Planetary system

In 2005, the discovery of a planet orbiting the star was announced. This is another discovery using the radial velocity method with the HARPS spectrograph.[5]

The HD 101930 planetary system[5]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 0.30 MJ 0.302 70.46 ± 0.18 0.11 ± 0.02 — —

See also

References
  1. Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
  3. Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2 June 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637. eISSN 1538-3881. ISSN 0004-6256.
  4. Cousins, A. W. J.; Stoy, R. H. (1963). Photoelectric magnitudes and colours of southern stars. Bibcode:1963pmcs.book.....C.
  5. Lovis, C.; Mayor, M.; Bouchy, F.; Pepe, F.; Queloz, D.; Santos, N. C.; Udry, S.; Benz, W.; Bertaux, J.-L.; Mordasini, C.; Sivan, J.-P. (30 June 2005). "The HARPS search for southern extra-solar planets". Astronomy & Astrophysics. 437 (3): 1121–1126. arXiv:astro-ph/0503660. Bibcode:2005A&A...437.1121L. doi:10.1051/0004-6361:20052864. eISSN 1432-0746. ISSN 0004-6361. S2CID 119492030.
  6. Margaret C Turnbull (2015). "ExoCat-1: The Nearby Stellar Systems Catalog for Exoplanet Imaging Missions". arXiv:1510.01731 [astro-ph.SR].
  7. Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. eISSN 1538-3881.
  8. Bonfanti, A.; Ortolani, S.; Piotto, G.; Nascimbeni, V. (12 February 2015). "Revising the ages of planet-hosting stars". Astronomy & Astrophysics. 575: A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951. eISSN 1432-0746. ISSN 0004-6361. S2CID 54555839.
  9. Sousa, S. G.; Santos, N. C.; Mayor, M.; Udry, S.; Casagrande, L.; Israelian, G.; Pepe, F.; Queloz, D.; Monteiro, M. J. P. F. G. (4 June 2008). "Spectroscopic parameters for 451 stars in the HARPS GTO planet search program". Astronomy & Astrophysics. 487 (1): 373–381. arXiv:0805.4826. Bibcode:2008A&A...487..373S. doi:10.1051/0004-6361:200809698. eISSN 1432-0746. ISSN 0004-6361.
  10. Tsantaki, M.; Sousa, S. G.; Santos, N. C.; Montalto, M.; Delgado-Mena, E.; Mortier, A.; Adibekyan, V.; Israelian, G. (October 2014). "Spectroscopic parameters for solar-type stars with moderate-to-high rotation". Astronomy & Astrophysics. 570: A80. arXiv:1407.6765. Bibcode:2014A&A...570A..80T. doi:10.1051/0004-6361/201424257. eISSN 1432-0746. ISSN 0004-6361.
  11. Llorente de Andrés, F.; Chavero, C.; de la Reza, R.; Roca-Fàbrega, S.; Cifuentes, C. (October 2021). "The evolution of lithium in FGK dwarf stars". Astronomy & Astrophysics. 654: A137. arXiv:2108.05852. Bibcode:2021A&A...654A.137L. doi:10.1051/0004-6361/202141339. eISSN 1432-0746. ISSN 0004-6361.
  12. "HD 101930". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved May 22, 2009.
  13. Mugrauer, M.; Seifahrt, A.; Neuhauser, R. (11 July 2007). "The multiplicity of planet host stars - new low-mass companions to planet host stars". Monthly Notices of the Royal Astronomical Society. 378 (4): 1328–1334. arXiv:0704.1767. Bibcode:2007MNRAS.378.1328M. doi:10.1111/j.1365-2966.2007.11858.x. eISSN 1365-2966. ISSN 0035-8711.
  14. Lindgren, Sara; Heiter, Ulrike; Seifahrt, Andreas (February 2016). "Metallicity determination of M dwarfs". Astronomy & Astrophysics. 586: A100. arXiv:1510.06642. Bibcode:2016A&A...586A.100L. doi:10.1051/0004-6361/201526602. eISSN 1432-0746. ISSN 0004-6361.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.