HD 133131

Last updated
HD 133131
Observation data
Epoch J2000        Equinox J2000
Constellation Libra [1]
A
Right ascension 15h 03m 35.44599s [2]
Declination −27° 50′ 33.2195″ [2]
Apparent magnitude  (V)8.40 [3]
B
Right ascension 15h 03m 35.80805s [4]
Declination −27° 50′ 27.5843″ [4]
Apparent magnitude  (V)8.42 [3]
Characteristics
A
Evolutionary stage main sequence [2]
Spectral type G2V [3]
B−V color index +0.622 [5]
B
Evolutionary stage main sequence [4]
Spectral type G2V [3]
B−V color index +0.622 [5]
Astrometry
A
Radial velocity (Rv)−16.37±0.19 [2] km/s
Proper motion (μ)RA: +156.227 mas/yr [2]
Dec.: −133.767 mas/yr [2]
Parallax (π)19.4325±0.0265  mas [2]
Distance 167.8 ± 0.2  ly
(51.46 ± 0.07  pc)
B
Radial velocity (Rv)−15.70±0.18 [4] km/s
Proper motion (μ)RA: +159.010 mas/yr [4]
Dec.: −139.133 mas/yr [4]
Parallax (π)19.4131 ± 0.0293  mas [4]
Distance 168.0 ± 0.3  ly
(51.51 ± 0.08  pc)
Orbit [3]
Period (P)~4240 yr
Details
HD 133131A
Mass 0.95 [3]   M☉
Radius 1.00 [2]   R☉
Luminosity 9.6 [2]   L☉
Surface gravity (log g)4.39±0.050 [3]   cgs
Temperature 5,799±19 [3]   K
Metallicity [Fe/H]−0.306±0.016 [3]   dex
Rotation 23 days [6]
Rotational velocity (v sin i)4.0 [7]  km/s
Age 6.3 [5]   Gyr
HD 133131B
Mass 0.93 [3]   M☉
Radius 1.01 [4]   R☉
Luminosity0.98 [4]   L☉
Surface gravity (log g)4.41±0.045 [3]   cgs
Temperature 5,805±15 [3]   K
Metallicity [Fe/H]−0.281±0.013 [3]   dex
Rotation 22 days [6]
Rotational velocity (v sin i)7.0 [7]  km/s
Age 5.9 [5]   Gyr
Other designations
CPD−27°5116, HD 133131, HIP 73674 [8]
HD 133131A: SAO 183128, TYC 6756-1541-1, 2MASS J15033543-2750330 [9]
HD 133131B: SAO 183129, TYC 6756-867-1, 2MASS J15033579-2750273 [10]
Database references
SIMBAD The system
A
B
Exoplanet Archive data

HD 133131 is a binary star in the constellation of Libra. It is 168 light-years (51.5 parsecs) away from the Sun. [3] It consists of two G-type main-sequence stars; [3] neither are bright enough to be seen with the naked eye. The star was first catalogued as a binary in 1972. [11] [3]

Contents

Both components, HD 133131 A and B, are very similar to the Sun but are far older, about 6 billion years old. They also have low metallicities (50% of solar abundance), and HD 133131A is additionally depleted in heavy elements compared to HD 133131B, indicating a possibly past planetary engulfment event for HD 133131 B. [6]

Planetary system

In 2016, two planets orbiting HD 133131A and one planet orbiting HD 133131B were discovered utilizing the radial velocity method. All three are long-period giant planets. [3]

The HD 133131A planetary system [3]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b≥1.43  MJ 1.446490.32——
c≥0.63  MJ 4.7939250.20——
The HD 133131B planetary system [3]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b≥2.50  MJ 6.4061190.62——

See also

Other systems with multiple planet-hosting stars:

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 3 4 5 6 7 8 9 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.
  3. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Teske, Johanna K; Shectman, Stephen A; Vogt, Steve S; Díaz, Matías; Butler, R. Paul; Crane, Jeffrey D; Thompson, Ian B; Arriagada, Pamela (2016). "The Magellan PFS Planet Search Program: Radial Velocity and Stellar Abundance Analyses of the 360 AU, Metal-Poor Binary "Twins" HD 133131A & B". The Astronomical Journal. 152 (6): 167. arXiv: 1608.06216 . Bibcode:2016AJ....152..167T. doi: 10.3847/0004-6256/152/6/167 . S2CID   118852162.
  4. 1 2 3 4 5 6 7 8 9 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.
  5. 1 2 3 4 Arriagada, Pamela (2011). "Chromospheric Activity of Southern Stars from the Magellan Planet Search Program". The Astrophysical Journal. 734 (1): 70. arXiv: 1104.3186 . Bibcode:2011ApJ...734...70A. doi:10.1088/0004-637X/734/1/70. S2CID   118384591.
  6. 1 2 3 Oh, Semyeong; Price-Whelan, Adrian M.; Brewer, John M.; Hogg, David W.; Spergel, David N.; Myles, Justin (2017). "Kronos and Krios: Evidence for Accretion of a Massive, Rocky Planetary System in a Comoving Pair of Solar-type Stars". The Astrophysical Journal. 854 (2): 138. arXiv: 1709.05344 . doi: 10.3847/1538-4357/aaab4d . S2CID   119076217.
  7. 1 2 Glebocki, R.; Gnacinski, P. (2005). "VizieR Online Data Catalog: Catalog of Stellar Rotational Velocities (Glebocki+ 2005)". VizieR On-line Data Catalog: III/244. Originally Published in: 2005csss...13..571G; 2005yCat.3244....0G. 3244. Bibcode:2005yCat.3244....0G.
  8. ↑ "HD 133131". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 29 September 2020.
  9. ↑ "HD 133131A". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 29 September 2020.
  10. ↑ "HD 133131B". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 29 September 2020.
  11. ↑ Stock, J.; Wroblewski, H. (May 1972). "Double stars of equal components". Astronomy and Astrophysics . 18: 341. Bibcode:1972A&A....18..341S.
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