HD 114783

Last updated
HD 114783
Observation data
Epoch J2000       Equinox J2000
Constellation Virgo
Right ascension 13h 12m 43.78556s [1]
Declination –02° 15′ 54.1307″ [1]
Apparent magnitude  (V)7.56 [2]
Characteristics
Spectral type K1V [3]
B−V color index 0.930±0.013 [2]
Variable type Constant [4]
Astrometry
Radial velocity (Rv)−12.07±0.12 [1]  km/s
Proper motion (μ)RA: −138.362(34)  mas/yr [1]
Dec.: 10.284(22)  mas/yr [1]
Parallax (π)47.5529 ± 0.0291  mas [1]
Distance 68.59 ± 0.04  ly
(21.03 ± 0.01  pc)
Absolute magnitude  (MV)6.00 [2]
Details [5]
Mass 0.883+0.018
−0.028  M☉
Radius 0.810+0.011
−0.009  R☉
Luminosity 0.423±0.001 [6]   L☉
Surface gravity (log g)4.42±0.58  cgs
Temperature 5,114±12  K
Metallicity [Fe/H]0.08±0.11  dex
Rotational velocity (v sin i)1.9±0.5 km/s
Age 2.5+3.0
−1.6  Gyr
Other designations
BD−01°2784, GJ  3769, HD  114783, HIP  64457, SAO  139218
Database references
SIMBAD data
Exoplanet Archive data
ARICNS data

HD 114783 is a star with two exoplanetary companions in the equatorial constellation of Virgo. With an apparent visual magnitude of 7.56 [2] it is too faint to be visible with the unaided eye, but is an easy target for binoculars. Based on parallax measurements, it is located at a distance of 68.6 light-years (21.0 parsecs ) from the Sun, but is drifting closer with a radial velocity of −12 km/s. [1]

This is an orange-hued K-type main-sequence star with a stellar classification of K1V. [3] It is roughly 2.5 [5]  billion years old and is chromospherically inactive [4] with a low projected rotational velocity of 1.9 km/s. [5] The star has 88% of the mass and 81% of the radius of the Sun. [5] It is radiating 42% [6] of the luminosity of the Sun from its photosphere at an effective temperature of 5,114 K. [5]

In 2001, the California and Carnegie Planet Search team found an exoplanet, HD 114783 b, orbiting the star using the radial velocity method. The discovery was made with the Keck Telescope. [4] A second companion, HD 114783 c, was discovered in 2016, [7] and in 2023 its inclination and true mass were measured via astrometry. [8]

The HD 114783 planetary system [9] [8]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥ 1.034±0.089  MJ 1.169±0.068496.9±2.30.085±0.033——
c1.9+0.5
−0.4  MJ 		5.0±0.14,352+88
−76		0.05+0.04
−0.03		21+7
−4 or 159+4
−6 ° 		—

See also

Related Research Articles

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References

  1. 1 2 3 4 5 6 7 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.
  2. 1 2 3 4 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.
  3. 1 2 Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey. 5. Bibcode:1999MSS...C05....0H.
  4. 1 2 3 Vogt, Steven S.; et al. (2002). "Ten Low-Mass Companions from the Keck Precision Velocity Survey". The Astrophysical Journal. 568 (1): 352–362. arXiv: astro-ph/0110378 . Bibcode:2002ApJ...568..352V. doi:10.1086/338768. S2CID   2272917.
  5. 1 2 3 4 5 Soto, M. G.; Jenkins, J. S. (2018). "Spectroscopic Parameters and atmosphEric ChemIstriEs of Stars (SPECIES). I. Code description and dwarf stars catalogue". Astronomy and Astrophysics. 615: A76. arXiv: 1801.09698 . Bibcode:2018A&A...615A..76S. doi:10.1051/0004-6361/201731533. S2CID   119107228.
  6. 1 2 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.
  7. ↑ Bryan, Marta L.; et al. (2016). "Statistics of Long Period Gas Giant Planets in Known Planetary Systems". The Astrophysical Journal. 821 (2): 89. arXiv: 1601.07595 . Bibcode:2016ApJ...821...89B. doi: 10.3847/0004-637X/821/2/89 . S2CID   19709252.
  8. 1 2 Philipot, F.; Lagrange, A.-M.; et al. (August 2023). "Multi techniques approach to identify and/or constrain radial velocity sub-stellar companions". Astronomy & Astrophysics . 678: A107. arXiv: 2308.05417 . doi:10.1051/0004-6361/202346612. S2CID   260775968.
  9. ↑ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv: astro-ph/0607493 . Bibcode:2006ApJ...646..505B. doi:10.1086/504701. S2CID   119067572.
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