HD 126053

Last updated
HD 126053
HD 126053 unWISE.jpg
HD 126053 and brown dwarf companion (blue circle)
Credit: unWISE & Meli_thev
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 sdT7.5 [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]
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 [12]   M☉
Radius 0.080-0.099 [12]   R☉
Temperature 680±55 [12]   K
Metallicity −0.35 [5]
Other designations
BD+01°2920, GJ  547, HD  126053, HIP  70319, HR  5384, SAO  120424 [13]
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. [12] 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. [14]

In 2012, a brown dwarf was discovered orbiting this star at a distance of 2630 AU. This brown dwarf has a low temperature and is a T dwarf, with an estimated spectral type of T8p in the discovery paper. Discrepancies in the Y and K bands, likely due to low metallicity. [12] Later the spectral types of low metallicity brown dwarfs, called subdwarfs, were revisited. This lead to a re-classification of sdT7.5 and a metallicity of [M/H]= −0.35. [5]

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<span class="mw-page-title-main">Alpha Mensae</span> Star in the constellation Mensa

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HD 125072 is a star in the southern constellation of Centaurus. It is a challenge to view with the naked eye, having an apparent visual magnitude of 6.637. The star is located at a distance of 38.6 light years from the Sun based on parallax. It is drifting closer with a radial velocity of −14.9 km/s. The components of the space velocity for this star are U=−18.5, V=−6.9 and W=−26.9 km/s.

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<span class="mw-page-title-main">V538 Aurigae</span> Star in constellation Auriga

V538 Aurigae is a single star in the northern constellation of Auriga. With an apparent visual magnitude of 6.23, this star requires good dark sky conditions to view with the naked eye. It is located at a distance of 40.0 light-years (12.3 pc) from Sun based on parallax. The star is drifting further away with a radial velocity of 0.9 km/s. It is a member of the Local Association, and is most likely a thin disk star.

HD 60532 is a star with two orbiting exoplanets in the southern constellation of Puppis. The designation HD 60532 takes its name from the Henry Draper Catalogue. The system is located at a distance of 85.5 light years from the Sun, and is drifting further away with a radial velocity of 61 km/s. At that distance, the star has an apparent visual magnitude of 4.45, which is bright enough to be faintly visible to the naked eye. The motion of this system through space brought it within 10.3 light-years of the Sun some 408,600 years ago.

HD 171238 is a star with an orbiting exoplanet in the southern constellation of Sagittarius. It is located at a distance of 145 light years from the Sun based on parallax measurements, and is drifting further away with a radial velocity of 21 km/s. The star has an absolute magnitude of 5.15, but at the distance of this system it is too faint to be viewed with the naked eye, having an apparent visual magnitude of 8.61.

GJ 1062 is a single red dwarf star in the constellation Eridanus, positioned about two degrees to the SSE of Epsilon Eridani. It is also known as LHS 20 and Ross 578. The star is invisible to the naked eye with an apparent visual magnitude of +13.0, requiring a telescope with at least a 25 cm (10 in) aperture to view. It is located at a distance of 52.7 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −85 km/s. The star has a high proper motion, traversing the sky at the rate of 3.033 arcseconds per year.

Gliese 251, also known as HIP 33226 or HD 265866, is a star located about 18 light years away from the Solar System. Located in the constellation of Gemini, it is the nearest star in this constellation. It is located near the boundary with Auriga, 49 arcminutes away from the bright star Theta Geminorum; due to its apparent magnitude of +9.89 it cannot be observed with the naked eye. The closest star to Gliese 251 is QY Aurigae, which is located 3.5 light years away.

HD 219623 is a solitary star in the northern circumpolar constellation of Cassiopeia. HD 219623 is its Henry Draper Catalogue designation. It has an apparent visual magnitude of 5.59, which lies in the brightness range that is visible to the naked eye. According to the Bortle scale, it can be observed from dark suburban skies. Parallax measurements place it at an estimated distance of around 67.2 light years. It has a relatively high proper motion, advancing 262 mas per year across the celestial sphere.

HD 33266 is a solitary star in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 6.17, making it faintly visible to the naked eye. Located 481 light years away, it is approaching the Sun with a heliocentric radial velocity of −4.4 km/s.

HD 46815 is a solitary star in the southern constellation Columba. It is faintly visible to the naked eye with an apparent magnitude of 5.4 and is estimated to be 408 light years away. However, it is receding with a heliocentric radial velocity of 32.2 km/s.

<span class="mw-page-title-main">HD 117566</span> High proper motion star; Camelopardalis

HD 117566, also known as HR 5091, is a solitary yellow-hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.74, making it faintly visible to the naked eye. This object is relatively close at a distance of 291 light years based on Gaia DR3 parallax measurements but is receding with a heliocentric radial velocity of 14 km/s. At its current distance, HD 117566's brightness is diminished by 0.12 magnitudes due to interstellar dust.

References

  1. 1 2 3 4 5 6 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. 1 2 3 4 5 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. 1 2 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. 1 2 3 Burgasser, Adam J.; Schneider, Adam C.; Meisner, Aaron M.; Caselden, Dan; Hsu, Chih-Chun; Gerasimov, Roman; Aganze, Christian; Softich, Emma; Karpoor, Preethi (2024-11-08). "New Cold Subdwarf Discoveries from Backyard Worlds and a Metallicity Classification System for T Subdwarfs". arXiv: 2411.01378 [astro-ph].
  6. 1 2 3 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. 1 2 3 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. 1 2 3 4 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.
  13. ↑ "HD 126053". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2015-11-13.{{cite web}}: CS1 maint: postscript (link)
  14. ↑ 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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