HD 126053

HD 126053 is the Henry Draper Catalogue designation for a star in the equatorial constellation of Virgo. It has an apparent magnitude of 6.25,[2] which means it is faintly visible to the naked eye. According to the Bortle scale, it requires dark suburban or rural skies to view. Parallax measurements made by the Hipparcos spacecraft provide an estimated distance of 57 light years to this star.[1] It is drifting closer with a heliocentric radial velocity of −19.2 km/s.[2]

HD 126053
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Virgo
Right ascension 14h 23m 15.285s[1]
Declination +01° 14′ 29.64″[1]
Apparent magnitude (V) 6.25[2]
Characteristics
HD 126053 A
Evolutionary stage Main sequence
Spectral type G1 V[3]
U−B color index +0.09[4]
B−V color index 0.639[2]
HD 126053 B
Evolutionary stage Brown dwarf
Spectral type T8[5]
Astrometry
Radial velocity (Rv)−19.17±0.06[2] km/s
Proper motion (μ) RA: 223.531 mas/yr[1]
Dec.: −478.275 mas/yr[1]
Parallax (π)57.2706 ± 0.0375 mas[1]
Distance56.95 ± 0.04 ly
(17.46 ± 0.01 pc)
Details
HD 126053 A
Mass0.89[6] M☉
Radius0.93[7] R☉
Luminosity0.83[6] L☉
Luminosity (bolometric)0.812[8] L☉
Surface gravity (log g)4.57[9] cgs
Temperature5,722[9] K
Metallicity [Fe/H]−0.28[9] dex
Rotation22 d[10]
Rotational velocity (v sin i)3.08[3] km/s
Age5.490[11] Gyr
HD 126053 B
Mass0.019-0.047[5] M☉
Radius0.080-0.099[5] R☉
Temperature680±55[5] K
Metallicity [Fe/H]−0.38±0.06[5] dex
Other designations
BD+01°2920, GJ 547, HD 126053, HIP 70319, HR 5384, SAO 120424[12]
Database references
SIMBADdata

This star is considered a solar analog—meaning that it is photometrically analogous to the Sun.[6] The physical properties of this star are similar to the Sun, although it is metal poor.[5] Like the Sun, it has a magnetic activity cycle. It shares a common proper motion through space with the spectroscopic binary star system HD 122742, and in the past the three may have formed a triple star system. In the Bright Star Catalogue, it was noted as having an infrared excess. This may have been accreted from the HD 122742 system when the three stars were closer to each other.[13]

In 2012, a brown dwarf was discovered orbiting this star at a distance of 2630 AU.[5]

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. Soubiran, C.; et al. (April 2013), "The catalogue of radial velocity standard stars for Gaia. I. Pre-launch release", Astronomy & Astrophysics, 552: 11, arXiv:1302.1905, Bibcode:2013A&A...552A..64S, doi:10.1051/0004-6361/201220927, S2CID 56094559, A64.
  3. Martínez-Arnáiz, R.; et al. (September 2010), "Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter" (PDF), Astronomy and Astrophysics, 520: A79, arXiv:1002.4391, Bibcode:2010A&A...520A..79M, doi:10.1051/0004-6361/200913725, S2CID 43455849, archived from the original (PDF) on 2017-09-22, retrieved 2018-11-04.
  4. Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data, SIMBAD, Bibcode:1986EgUBV........0M.
  5. Pinfield, D. J.; et al. (May 2012), "Discovery of the benchmark metal-poor T8 dwarf BD +01° 2920B", Monthly Notices of the Royal Astronomical Society, 422 (3): 1922–1932, arXiv:1201.3243, Bibcode:2012MNRAS.422.1922P, doi:10.1111/j.1365-2966.2012.20549.x, S2CID 6257539.
  6. Do Nascimento, J. D.; et al. (September 2010), "Rotation and lithium abundance of solar-analog stars. Theoretical analysis of observations", Astronomy and Astrophysics, 519: 9, arXiv:1006.3861, Bibcode:2010A&A...519A.101D, doi:10.1051/0004-6361/200811026, S2CID 56098215, A101.
  7. Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy & Astrophysics, 367 (2): 521–24, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
  8. Eiroa, C.; et al. (July 2013), "DUst around NEarby Stars. The survey observational results", Astronomy & Astrophysics, 555: A11, arXiv:1305.0155, Bibcode:2013A&A...555A..11E, doi:10.1051/0004-6361/201321050, S2CID 377244.
  9. Gray, R. O.; et al. (July 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, S2CID 119476992.
  10. Baliunas, S.; Sokoloff, D.; Soon, W. (1996), "Magnetic Field and Rotation in Lower Main-Sequence Stars: an Empirical Time-dependent Magnetic Bode's Relation?", Astrophysical Journal Letters, 457 (2): L99, Bibcode:1996ApJ...457L..99B, doi:10.1086/309891.
  11. Vican, Laura (June 2012), "Age Determination for 346 Nearby Stars in the Herschel DEBRIS Survey", The Astronomical Journal, 143 (6): 135, arXiv:1203.1966, Bibcode:2012AJ....143..135V, doi:10.1088/0004-6256/143/6/135, S2CID 118539505.
  12. "HD 126053". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2015-11-13.{{cite web}}: CS1 maint: postscript (link)
  13. Frisch, P. C. (April 1993), "G-star astropauses - A test for interstellar pressure", Astrophysical Journal, Part 1, 407 (1): 198–206, Bibcode:1993ApJ...407..198F, doi:10.1086/172505.
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