Astronomy:HD 126053
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[1] mas/yr Dec.: −478.275[1] mas/yr |
| Parallax (π) | 57.2706 ± 0.0375[1] mas |
| Distance | 56.95 ± 0.04 ly (17.46 ± 0.01 pc) |
| Details | |
| HD 126053 A | |
| Mass | 0.89[6] M☉ |
| Radius | 0.93[7] R☉ |
| Luminosity | 0.83[6] L☉ |
| Luminosity (bolometric) | 0.812[8] L☉ |
| Surface gravity (log g) | 4.57[9] cgs |
| Temperature | 5,722[9] K |
| Metallicity [Fe/H] | −0.28[9] dex |
| Rotation | 22 d[10] |
| Rotational velocity (v sin i) | 3.08[3] km/s |
| Age | 5.490[11] Gyr |
| HD 126053 B | |
| Mass | 0.019-0.047[5] M☉ |
| Radius | 0.080-0.099[5] R☉ |
| Temperature | 680±55[5] K |
| Metallicity [Fe/H] | −0.38±0.06[5] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
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]
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
- ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 Soubiran, C. et al. (April 2013), "The catalogue of radial velocity standard stars for Gaia. I. Pre-launch release", Astronomy & Astrophysics 552: 11, doi:10.1051/0004-6361/201220927, A64, Bibcode: 2013A&A...552A..64S.
- ↑ 3.0 3.1 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", Astronomy and Astrophysics 520: A79, doi:10.1051/0004-6361/200913725, Bibcode: 2010A&A...520A..79M, http://eprints.ucm.es/37826/1/davidmontes17libre.pdf, retrieved 2018-11-04.
- ↑ Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data (SIMBAD), Bibcode: 1986EgUBV........0M.
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 5.6 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, doi:10.1111/j.1365-2966.2012.20549.x, Bibcode: 2012MNRAS.422.1922P.
- ↑ 6.0 6.1 6.2 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, doi:10.1051/0004-6361/200811026, A101, Bibcode: 2010A&A...519A.101D.
- ↑ 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, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
- ↑ Eiroa, C. et al. (July 2013), "DUst around NEarby Stars. The survey observational results", Astronomy & Astrophysics 555: A11, doi:10.1051/0004-6361/201321050, Bibcode: 2013A&A...555A..11E.
- ↑ 9.0 9.1 9.2 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, doi:10.1086/504637, Bibcode: 2006AJ....132..161G.
- ↑ 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, doi:10.1086/309891, Bibcode: 1996ApJ...457L..99B.
- ↑ Vican, Laura (June 2012), "Age Determination for 346 Nearby Stars in the Herschel DEBRIS Survey", The Astronomical Journal 143 (6): 135, doi:10.1088/0004-6256/143/6/135, Bibcode: 2012AJ....143..135V.
- ↑ "HD 126053". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+126053.
- ↑ Frisch, P. C. (April 1993), "G-star astropauses - A test for interstellar pressure", Astrophysical Journal, Part 1 407 (1): 198–206, doi:10.1086/172505, Bibcode: 1993ApJ...407..198F.
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