HD 23127 – Wikipedia

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Star in the constellation Reticulum

HD 23127 is a star in the southern constellation of Reticulum. With an apparent visual magnitude of +8.58[4] it is not visible to the naked eye, but can be viewed with a good pair of binoculars. The star is located at a distance of 307 light years from the Sun based on parallax, and is drifting further away with a radial velocity of ~22 km/s.[4] It has an absolute magnitude of 3.62.[4]

This is a G-type main-sequence star with a stellar classification of G2V,[3] which means it is generating energy through core hydrogen fusion. HD 23127 is more massive than the Sun at 1.21 solar masses and has a 49% larger radius. It is metal-rich, having nearly double the abundance of iron in its atmosphere compared to the Sun. This star has an age of 4.5 billion years;[2] about the same as the Sun.

On Friday, February 9, 2007, a 3.32 years period jovian planet was found by using the wobble method by O’Toole and colleagues in Australia.[7] It has minimum mass 53% greater than Jupiter and orbits with a 41% eccentricity. The maximum stable period for a hypothetical inner planet is 322.1 days.[2]

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  1. ^ a b c d e

    Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). “Gaia Data Release 2: Summary of the contents and survey properties”. Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A…616A…1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ a b c d e f Barbato, D.; et al. (August 2018). “Exploring the realm of scaled solar system analogues with HARPS”. Astronomy & Astrophysics. 615: 21. arXiv:1804.08329. Bibcode:2018A&A…615A.175B. doi:10.1051/0004-6361/201832791. S2CID 119099721. A175.
  3. ^ a b Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 1. Ann Arbor, Michigan: Department of Astronomy, University of Michigan. Bibcode:1978mcts.book…..H.
  4. ^ a b c d e Anderson, E.; Francis, Ch. (2012). “XHIP: An extended hipparcos compilation”. Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL…38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
  5. ^ Bonfanti, A.; et al. (2015). “Revising the ages of planet-hosting stars”. Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A…575A..18B. doi:10.1051/0004-6361/201424951.
  6. ^ “HD 23127”. SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-08-15.
  7. ^ O’Toole, Simon J.; et al. (2007). “New Planets around Three G Dwarfs”. The Astrophysical Journal. 660 (2): 1636–1641. arXiv:astro-ph/0702213. Bibcode:2007ApJ…660.1636O. doi:10.1086/513563.

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